INTEL DG41TX
Specifications
AA# (Altered Assembly)
E78178-XXX
An Intel Core 2 Quad processor
in an LGA775 socket with a 1333/1066/800 MHz system bus
BIOS ID string
TXG4110H.86A
Chipset
Intel G41 Express Chipset
Expansion capabilities
One PCI Express* 2.0 x 16 bus add-in card connector. One PCI Express 2.0 x 1 connector. Two PCI Conventional bus connectors.
Form factor
micro-ATX
Intel Core 2 Duo processor
in an LGA775 socket with a 1333/1066/800 MHz system bus
Intel High Definition Audio? subsystem in the following configuration
8-channel (5.1+ 2 independent multi-streaming) audio subsystem with three analog audio outputs using the Realtek* ALC888 audio codec
LAN support
Gigabit (10/100/1000 Mbits/sec) LAN subsystem using the Broadcom* Gigabit Ethernet Controller
Memory
Two 240-pin DDR3 SDRAM Dual Inline Memory Module (DIMM) sockets. Support for DDR3 1333(OC)/1066/800 MHz DIMMs. Support for up to 4 GBS of system memory.
Peripheral interfaces
Up to eight USB 2.0 ports. Four Serial ATA 3.0 Gb/s ports. One DVI-D and one VGA display port. Two PS2 ports (Mouse and Keyboard). One parallel port. One serial header. One Parallel ATA port.
Processor
Intel Core 2 Quad
Features
- G41 Chipset
- Intel Core 2 Duo
- Intel Core 2 Quad
- LGA775
- micro-ATX
Datasheet
Intel-DG41TX-ds1-1973945368.pdf
3269 KiB
Extracted Text
Intel® Desktop Board
DG41TX
Technical Product Specification
March 2010
Order Number: E89691-001US
®
The Intel Desktop Board DG41TX may contain design defects or errors known as errata that may cause the product to deviate from published
specifications. Current characterized errata are documented in the Intel Desktop Board DG41TX Specification Update.
Revision History
Revision Revision History Date
®
-001 March 2010
First release of the Intel Desktop Board DG41TX Technical Product
Specification
®
This product specification applies to only the standard Intel Desktop Board DG41TX with BIOS
identifier TXG4110H.86A.
Changes to this specification will be published in the Intel Desktop Board DG41TX Specification
Update before being incorporated into a revision of this document.
®
INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL PRODUCTS. NO LICENSE,
EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS
GRANTED BY THIS DOCUMENT. EXCEPT AS PROVIDED IN INTEL’S TERMS AND CONDITIONS OF SALE FOR
SUCH PRODUCTS, INTEL ASSUMES NO LIABILITY WHATSOEVER, AND INTEL DISCLAIMS ANY EXPRESS OR
IMPLIED WARRANTY, RELATING TO SALE AND/OR USE OF INTEL PRODUCTS INCLUDING LIABILITY OR
WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR INFRINGEMENT
OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS OTHERWISE AGREED IN
WRITING BY INTEL, THE INTEL PRODUCTS ARE NOT DESIGNED NOR INTENDED FOR ANY APPLICATION IN
WHICH THE FAILURE OF THE INTEL PRODUCT COULD CREATE A SITUATION WHERE PERSONAL INJURY OR
DEATH MAY OCCUR.
Intel Corporation may have patents or pending patent applications, trademarks, copyrights, or other
intellectual property rights that relate to the presented subject matter. The furnishing of documents and
other materials and information does not provide any license, express or implied, by estoppel or otherwise,
to any such patents, trademarks, copyrights, or other intellectual property rights.
Intel may make changes to specifications and product descriptions at any time, without notice.
Designers must not rely on the absence or characteristics of any features or instructions marked “reserved”
or “undefined.” Intel reserves these for future definition and shall have no responsibility whatsoever for
conflicts or incompatibilities arising from future changes to them.
®
Intel desktop boards may contain design defects or errors known as errata, which may cause the product
to deviate from published specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your
product order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel
literature, may be obtained from:
Intel Corporation
P.O. Box 5937
Denver, CO 80217-9808
or call in North America 1-800-548-4725, Europe 44-0-1793-431-155, France 44-0-1793-421-777,
Germany 44-0-1793-421-333, other Countries 708-296-9333.
Intel, the Intel logo, Pentium, Core, Xeon, and Celeron are trademarks of Intel Corporation in the U.S. and
other countries.
* Other names and brands may be claimed as the property of others.
** The Intel G41 Express Chipset is a variant derived from the Intel G41 Express Chipset.
Copyright © 2010, Intel Corporation. All rights reserved.
Preface
This Technical Product Specification (TPS) specifies the board layout, components,
®
connectors, power and environmental requirements, and the BIOS for the Intel
Desktop Board DG41TX. It describes the standard product and available
manufacturing options.
Intended Audience
The TPS is intended to provide detailed, technical information about the Intel Desktop
Board DG41TX and its components to the vendors, system integrators, and other
engineers and technicians who need this level of information. It is specifically not
intended for general audiences.
What This Document Contains
Chapter Description
1 A description of the hardware used on the board
2 A map of the resources of the board
3 The features supported by the BIOS Setup program
4 A description of the BIOS error messages, beep codes, and POST codes
5 Regulatory compliance and battery disposal information
Typographical Conventions
This section contains information about the conventions used in this specification. Not
all of these symbols and abbreviations appear in all specifications of this type.
Notes, Cautions, and Warnings
NOTE
Notes call attention to important information.
CAUTION
Cautions are included to help you avoid damaging hardware or losing data.
iii
Intel Desktop Board DG41TX Technical Product Specification
Other Common Notation
# Used after a signal name to identify an active-low signal (such as USBP0#)
GB Gigabyte (1,073,741,824 bytes)
GB/s Gigabytes per second
Gb/s Gigabits per second
KB Kilobyte (1024 bytes)
Kbit Kilobit (1024 bits)
kbits/s 1000 bits per second
MB Megabyte (1,048,576 bytes)
MB/s Megabytes per second
Mbit Megabit (1,048,576 bits)
Mbits/s Megabits per second
xxh An address or data value ending with a lowercase h indicates a hexadecimal value.
x.x V Volts. Voltages are DC unless otherwise specified.
* This symbol is used to indicate third-party brands and names that are the property of their
respective owners.
# Used after a signal name to identify an active-low signal (such as USBP0#)
GB Gigabyte (1,073,741,824 bytes)
GB/s Gigabytes per second
Gb/s Gigabits per second
KB Kilobyte (1024 bytes)
Kbit Kilobit (1024 bits)
kbits/s 1000 bits per second
MB Megabyte (1,048,576 bytes)
MB/s Megabytes per second
Mbit Megabit (1,048,576 bits)
Mbits/s Megabits per second
xxh An address or data value ending with a lowercase h indicates a hexadecimal value.
x.x V Volts. Voltages are DC unless otherwise specified.
* This symbol is used to indicate third-party brands and names that are the property of their
respective owners.
iv
Contents
1 Product Description
1.1 Overview.......................................................................................... 9
1.1.1 Feature Summary .................................................................. 9
1.1.2 Board Layout....................................................................... 11
1.1.3 Block Diagram ..................................................................... 13
1.2 Legacy Considerations...................................................................... 14
1.3 Online Support................................................................................ 14
1.4 Processor ....................................................................................... 14
1.5 System Memory .............................................................................. 15
1.5.1 Memory Configurations ......................................................... 16
®
1.6 Intel G41 Express Chipset** ........................................................... 18
®
1.6.1 Intel G41 Graphics Subsystem** .......................................... 18
1.6.2 USB ................................................................................... 20
1.6.3 Serial ATA Interfaces ............................................................ 21
1.7 Parallel ATA IDE Controller................................................................ 22
1.8 Real-Time Clock Subsystem .............................................................. 23
1.9 Legacy I/O Controller....................................................................... 23
1.9.1 Serial Port Interface.............................................................. 23
1.9.2 PS/2 Interfaces.................................................................... 24
1.10 Audio Subsystem............................................................................. 24
1.10.1 Audio Subsystem Software .................................................... 25
1.10.2 Audio Connectors and Headers............................................... 25
1.11 LAN Subsystem............................................................................... 26
1.11.1 LAN Subsystem Software....................................................... 26
1.11.2 RJ-45 LAN Connector with Integrated LEDs .............................. 27
1.12 Hardware Management Subsystem .................................................... 28
1.12.1 Hardware Monitoring and Fan Control...................................... 28
1.12.2 Fan Monitoring..................................................................... 28
1.12.3 Chassis Intrusion Detection.................................................... 28
1.12.4 Thermal Monitoring .............................................................. 29
1.13 Power Management ......................................................................... 30
1.13.1 ACPI................................................................................... 30
1.13.2 Hardware Support ................................................................ 33
1.13.3 ENERGY STAR*, e-Standby, and EuP Compliance...................... 37
2 Technical Reference
2.1 Memory Map................................................................................... 39
2.1.1 Addressable Memory............................................................. 39
2.2 Connectors and Headers................................................................... 42
2.2.1 Back Panel Connectors.......................................................... 43
2.2.2 Component-side Connectors and Headers ................................ 44
2.3 Jumper Block.................................................................................. 53
2.4 Mechanical Considerations ................................................................ 55
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Intel Desktop Board DG41TX Technical Product Specification
2.4.1 Form Factor......................................................................... 55
2.5 Electrical Considerations................................................................... 56
2.5.1 Power Supply Considerations ................................................. 56
2.5.2 Fan Header Current Capability................................................ 57
2.5.3 Add-in Board Considerations .................................................. 57
2.6 Thermal Considerations.................................................................... 57
2.7 Reliability ....................................................................................... 59
2.8 Environmental ................................................................................ 60
3 Overview of BIOS Features
3.1 Introduction ................................................................................... 61
3.2 BIOS Flash Memory Organization....................................................... 62
3.3 Resource Configuration .................................................................... 62
3.3.1 PCI Autoconfiguration ........................................................... 62
3.3.2 PCI IDE Support................................................................... 63
3.4 System Management BIOS (SMBIOS)................................................. 63
3.5 Legacy USB Support ........................................................................ 64
3.6 BIOS Updates ................................................................................. 65
3.6.1 Language Support ................................................................ 65
3.6.2 Custom Splash Screen .......................................................... 66
3.7 BIOS Recovery................................................................................ 66
3.8 Boot Options................................................................................... 67
3.8.1 Optical Drive Boot ................................................................ 67
3.8.2 Network Boot....................................................................... 67
3.8.3 Booting Without Attached Devices........................................... 67
3.8.4 Changing the Default Boot Device During POST ........................ 67
3.9 Adjusting Boot Speed....................................................................... 68
3.9.1 Peripheral Selection and Configuration..................................... 68
3.9.2 BIOS Boot Optimizations ....................................................... 68
3.10 BIOS Security Features .................................................................... 69
4 Error Messages and Beep Codes
4.1 Speaker ......................................................................................... 71
4.2 BIOS Beep Codes ............................................................................ 71
4.3 Front-panel Power LED Blink Codes.................................................... 72
4.4 BIOS Error Messages ....................................................................... 72
4.5 Port 80h POST Codes ....................................................................... 73
5 Regulatory Compliance and Battery Disposal Information
5.1 Regulatory Compliance..................................................................... 79
5.1.1 Safety Standards.................................................................. 79
5.1.2 European Union Declaration of Conformity Statement................ 80
5.1.3 Product Ecology Statements................................................... 81
5.1.4 EMC Regulations .................................................................. 85
5.1.5 Product Certification Markings (Board Level)............................. 86
5.2 Battery Disposal Information............................................................. 87
vi
Contents
Figures
1. Major Board Components.................................................................. 11
2. Block Diagram................................................................................ 13
3. Memory Channel Configuration and DIMM Configuration........................ 17
4. Back Panel Audio Connector Options .................................................. 25
5. LAN Connector LED Locations............................................................ 27
6. Thermal Sensors and Fan Headers ..................................................... 29
7. Location of the Standby Power Indicator LED....................................... 36
8. Detailed System Memory Address Map ............................................... 40
9. Back Panel Connectors ..................................................................... 43
10. Component-side Connectors and Headers ........................................... 44
11. Connection Diagram for Front Panel Header ........................................ 50
12. Connection Diagram for Front Panel USB Headers ................................ 52
13. Location of the Jumper Block............................................................. 53
14. Board Dimensions........................................................................... 55
15. Localized High Temperature Zones..................................................... 58
Tables
1. Feature Summary.............................................................................. 9
2. Board Components Shown in Figure 1 ................................................ 12
3. Supported Memory Configurations ..................................................... 15
4. Audio Jack Retasking Support ........................................................... 24
5. LAN Connector LED States................................................................ 27
6. Effects of Pressing the Power Switch .................................................. 30
7. Power States and Targeted System Power........................................... 31
8. Wake-up Devices and Events ............................................................ 32
9. System Memory Map ....................................................................... 41
10. Component-side Connectors and Headers Shown in Figure 10................ 45
11. Serial ATA Connectors...................................................................... 46
12. Serial Port Header ........................................................................... 46
13. Chassis Intrusion Header.................................................................. 46
14. Processor (4-pin) Fan Header............................................................ 46
15. Front and Rear Chassis Fan Headers .................................................. 46
16. Front Panel Audio Header for Intel HD Audio........................................ 47
17. Front Panel Audio Header for AC ’97 Audio .......................................... 47
18. Intel HD Audio Link Header............................................................... 47
19. S/PDIF Header................................................................................ 47
20. Processor Core Power Connector........................................................ 49
21. Main Power Connector...................................................................... 49
22. Front Panel Header .......................................................................... 50
23. States for a One-Color Power LED...................................................... 51
24. States for a Two-Color Power LED...................................................... 51
25. Alternate Front Panel Power LED Header............................................. 51
26. BIOS Setup Configuration Jumper Settings.......................................... 54
27. Recommended Power Supply Current Values ....................................... 56
28. Fan Header Current Capability........................................................... 57
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Intel Desktop Board DG41TX Technical Product Specification
29. Thermal Considerations for Components ............................................. 59
30. Intel Desktop Board DG41TX Environmental Specifications .................... 60
31. BIOS Setup Program Menu Bar.......................................................... 62
32. BIOS Setup Program Function Keys.................................................... 62
33. Acceptable Drives/Media Types for BIOS Recovery ............................... 66
34. Boot Device Menu Options ................................................................ 67
35. Supervisor and User Password Functions............................................. 69
36. BIOS Beep Codes ............................................................................ 71
37. Front-panel Power LED Blink Codes.................................................... 72
38. BIOS Error Messages ....................................................................... 72
39. Port 80h POST Code Ranges.............................................................. 73
40. Port 80h POST Codes ....................................................................... 74
41. Typical Port 80h POST Sequence........................................................ 77
42. Safety Standards............................................................................. 79
43. Lead-Free Board Markings ................................................................ 84
44. EMC Regulations............................................................................. 85
45. Product Certification Markings ........................................................... 86
viii
1 Product Description
1.1 Overview
1.1.1 Feature Summary
Table 1 summarizes the major features of the Intel Desktop Board DG41TX.
Table 1. Feature Summary
Form Factor MicroATX (9.60 inches by 8.60 inches [243.84 millimeters by 218.44 millimeters])
Processor Support for the following:
®
• Intel Core™2 Quad processor Q6000/Q8000/Q9000 series in an LGA775 socket
®
• Intel Core™2 Duo processor E4000/E6000/E7000/E8000 series in an LGA775
socket
® ®
• Intel Pentium Dual-Core processor E2000/E5000 series in an LGA775 socket
® ®
• Intel Celeron processor 400/1000 series in an LGA775 socket
® ®
• Intel Xeon processor 3000/X3000 series in an LGA775 socket
• Two 240-pin DDR3 SDRAM Dual Inline Memory Module (DIMM) sockets
Memory
• Support for DDR3 800 MHz, DDR3 1066 MHz, or DDR3 1333 (OC) MHz DIMMs
• Support for up to 4 GB of system memory
• Support for non-ECC memory
®
Chipset
Intel G41 Express Chipset**, consisting of:
®
• Intel 82G41 Graphics and Memory Controller Hub (GMCH)
®
• Intel 82801GB I/O Controller Hub (ICH7)
Video Integrated Graphics:
® ®
• Intel Graphics Media Accelerator X4500 (Intel GMA X4500) onboard graphics
subsystem with support for:
― Analog Displays (VGA)
― Digital Displays (DVI-D)
External Graphics:
• PCI Express* x16 add-in graphics card connector
• PCI Express x1 add-in card connector
• Conventional PCI* bus add-in card connectors
Audio 8-channel (5.1 +2) audio using the Realtek* ALC888VC high definition audio codec
Legacy I/O ITE IT8721F based legacy I/O controller with support for hardware management,
Control and PS/2*, parallel, and serial ports
continued
9
Intel Desktop Board DG41TX Technical Product Specification
Table 1. Feature Summary (continued)
• Eight USB 2.0 ports:
Peripheral
Interfaces
― Four ports are implemented with stacked back panel connectors
― Four ports are routed to two separate front panel headers
• Four Serial ATA (SATA) connectors
• One Parallel ATA (PATA) connector
• PS/2 keyboard/mouse ports on the back panel
• One serial port header
• Diskette drive connector
LAN Support 10/100/1000 Mbits/s LAN subsystem using Broadcom* BCM57788 Gigabit
Ethernet Controller
®
• Intel BIOS (resident in the SPI Flash device)
BIOS
• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
and SMBIOS
• Support for PCI* Local Bus Specification Revision 2.3
Instantly Available
PC Technology
• Support for PCI Express* Revision 1.1
• Suspend to RAM support
• Wake on PCI, serial port, front panel, PS/2 devices, PCI Express, LAN, and USB
ports
• Two Conventional PCI bus add-in card connectors
Expansion
Capabilities • One PCI Express x16 bus add-in card connector
• One PCI Express x1 bus add-in card connector
• Voltage sense to detect out of range power supply voltages
Hardware Monitor
Subsystem
• Thermal sense to detect out of range thermal values
• Three fan headers
• Two fan sense inputs used to monitor fan activity
10
Product Description
1.1.2 Board Layout
Figure 1 shows the location of the major components.
Figure 1. Major Board Components
Table 2 lists the components identified in Figure 1.
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Intel Desktop Board DG41TX Technical Product Specification
Table 2. Board Components Shown in Figure 1
Item/callout
from Figure 1 Description
A Front panel audio header
B Conventional PCI bus add-in card connector
C Conventional PCI bus add-in card connector
D PCI Express x1 bus add-in card connector
E PCI Express x16 bus add-in card connector
F Piezoelectric speaker
G Back panel connectors
H Processor core power connector (2 x 2)
I Rear chassis fan header
J Battery
K LGA775 processor socket
L Intel 82G41 GMCH
M Processor fan header
N DIMM Channel A socket
O DIMM Channel B socket
P Diskette drive connector
Q Parallel ATA IDE connector
R Main power connector (2 x 12)
S Standby power LED
T Intel 82801GB I/O Controller Hub (ICH7)
U Serial ATA connectors (4)
V Front chassis fan header
W Chassis intrusion header
X BIOS Setup configuration jumper block
Y Front panel USB header
Z Front panel USB header
AA Front panel header
BB Alternate front panel power LED header
CC Serial port header
®
DD Intel High Definition Audio Link header
EE S/PDIF header
12
Product Description
1.1.3 Block Diagram
Figure 2 is a block diagram of the major functional areas.
Figure 2. Block Diagram
13
Intel Desktop Board DG41TX Technical Product Specification
1.2 Legacy Considerations
®
This board differs from other Intel Desktop Board products, with specific changes
including (but not limited to) the following:
• No serial port on the back panel
1.3 Online Support
To find information Visit this World Wide Web site:
about…
Intel Desktop Board DG41TX http://www.intel.com/products/motherboard/DG41TX/index.htm
Desktop Board Support http://support.intel.com/support/motherboards/desktop
Available configurations for the http://www.intel.com/products/motherboard/DG41TX/index.htm
Intel Desktop Board DG41TX
Supported processors http://processormatch.intel.com
Chipset information http://www.intel.com/products/desktop/chipsets/index.htm
BIOS and driver updates http://downloadcenter.intel.com
Tested memory http://support.intel.com/support/motherboards/desktop/kr/CS-
025414.htm
1.4 Processor
The board is designed to support the following processors:
• Intel Core2 Quad processor Q6000/Q8000/Q9000 series in an LGA775 socket
• Intel Core2 Duo processor E4000/E5000/E6000/E8000 series in an LGA775 socket
• Intel Pentium Dual-Core processor E2000/E5000 series in an LGA775 socket
• Intel Celeron processor 400/1000 series in an LGA775 socket
• Intel Xeon processor 3000/X3000 series in an LGA775 socket
Other processors may be supported in the future. This board is designed to support
processors with a maximum wattage of 95 W. The processors listed above are only
supported when falling within the wattage requirements of the board. See the Intel
web site listed below for the most up-to-date list of supported processors.
For information about… Refer to:
Supported processors http://processormatch.intel.com
CAUTION
Use only the processors listed on the web site above. Use of unsupported processors
can damage the board, the processor, and the power supply.
NOTE
Use only ATX12V-compliant power supplies.
14
Product Description
For information about Refer to
Power supply connectors Section 2.2.2.3, page 49
1.5 System Memory
The board has two DIMM sockets and supports the following memory features:
• 1.9 V, 2.0 V, and 2.1 V DDR3 SDRAM DIMMs with gold plated contacts, with the
option to raise the voltage to support higher performance DDR3 SDRAM DIMMs
• Dual channel interleaved mode support
• Unbuffered, single-sided or double-sided DIMMs with the following restriction:
Double-sided DIMMs with x16 organization are not supported.
• 4 GB maximum total system memory. Refer to Section 2.1.1 on page 39 for
information on the total amount of addressable memory.
• Minimum total system memory: 512 MB
• Non-ECC DIMMs
• Serial Presence Detect
• DDR3 800 MHz, DDR3 1066 MHz, DDR3 1333 (OC) MHz SDRAM DIMMs
NOTE
To be fully compliant with all applicable DDR SDRAM memory specifications, the board
should be populated with DIMMs that support the Serial Presence Detect (SPD) data
structure. This enables the BIOS to read the SPD data and program the chipset to
accurately configure memory settings for optimum performance. If non-SPD memory
is installed, the BIOS will attempt to correctly configure the memory settings, but
performance and reliability may be impacted or the DIMMs may not function under the
determined frequency.
Table 3 lists the supported DIMM configurations.
Table 3. Supported Memory Configurations
DIMM Configuration SDRAM SDRAM Organization Number of SDRAM
(Note)
Capacity Density Front-side/Back-side Devices
1024 MB SS 1 Gbit 1 Gb x8/empty 8
2048 MB DS 1 Gbit 1 Gb x8/1 Gb x8 16
2048 MB SS 2 Gbit 2 Gb x8/empty 8
4096 MB DS 2 Gbit 2 Gb x8/2 Gb x8 16
Note: “DS” refers to double-sided memory modules (containing two rows of SDRAM) and “SS” refers to
single-sided memory modules (containing one row of SDRAM).
For information about… Refer to:
Tested Memory http://support.intel.com/support/motherboards/desktop/sb/
CS-025414.htm
15
Intel Desktop Board DG41TX Technical Product Specification
1.5.1 Memory Configurations
The Intel 82G41 GMCH supports the following types of memory organization:
• Dual channel (Interleaved) mode. This mode offers the highest throughput for
real world applications. Dual channel mode is enabled when the installed memory
capacities of both DIMM channels are equal. Technology and device width can vary
from one channel to the other but the installed memory capacity for each channel
must be equal. If different speed DIMMs are used between channels, the slowest
memory timing will be used.
• Single channel (Asymmetric) mode. This mode is equivalent to single channel
bandwidth operation for real world applications. This mode is used when only a
single DIMM is installed or the memory capacities are unequal. Technology and
device width can vary from one channel to the other. If different speed DIMMs are
used between channels, the slowest memory timing will be used.
• Flex mode. This mode provides the most flexible performance characteristics.
The bottommost DRAM memory (the memory that is lowest within the system
memory map) is mapped to dual channel operation; the topmost DRAM memory
(the memory that is nearest to the 4 GB address space limit), if any, is mapped to
single channel operation. Flex mode results in multiple zones of dual and single
channel operation across the whole of DRAM memory. To use flex mode, it is
necessary to populate both channels.
For information about… Refer to:
Memory Configuration Examples http://www.intel.com/support/motherboards/desktop/sb/cs-
011965.htm
16
Product Description
Figure 3 illustrates the memory channel and DIMM configuration.
Figure 3. Memory Channel Configuration and DIMM Configuration
17
Intel Desktop Board DG41TX Technical Product Specification
®
1.6 Intel G41 Express Chipset**
The Intel G41 Express Chipset** consists of the following devices:
• Intel 82G41 Graphics and Memory Controller Hub (GMCH) with Direct Media
Interface (DMI) interconnect
• Intel 82801GB I/O Controller Hub (ICH7) with DMI interconnect
The GMCH component provides interfaces to the CPU, memory, PCI Express, and the
DMI interconnect. The component also provides integrated graphics capabilities
supporting 3D, 2D, and display capabilities. The ICH7 is a centralized controller for
the board’s I/O paths.
The chipset supports the following features:
• Onboard graphics
• Dynamic Video Memory Technology
• USB
• Serial ATA
• Parallel IDE
For information about Refer to
The Intel G41 Express Chipset** http://www.intel.com/products/desktop/chipsets/index.htm
Resources used by the chipset Chapter 2
®
1.6.1 Intel G41 Graphics Subsystem
The Intel G41 Express Chipset** contains two separate, mutually exclusive graphics
options. Either the Intel Graphics Media Accelerator X4500 (Intel GMA X4500)
graphics controller (contained within the 82G41 GMCH) is used, or a PCI Express x16
add-in card can be used. When a PCI Express x16 add-in card is installed, the Intel
GMA X4500 graphics controller is disabled.
®
1.6.1.1 Intel Graphics Media Accelerator X4500 Graphics
Controller
The Intel GMA X4500 graphics controller features the following:
• High quality texture engine
⎯ DirectX10* and OpenGL* 2.0 compliant
⎯ Shader Model 4.0
• 3D Graphics Rendering enhancements
⎯ 1.6 dual texture GigaPixel/s max fill rate
⎯ 16-bit and 32-bit color
⎯ Vertex cache
• Video
⎯ High-definition content at up to 1080p resolution
⎯ Dynamic Video Memory Technology (DVMT) 5.0 uses system memory
depending on the operating system and the amount of memory installed
18
Product Description
• Display
⎯ Supports digital and analog displays up to 2048 x 1536 at 75 Hz refresh
(QXGA); also supports 1920 x 1080 resolution for full high-definition video
playback quality
⎯ Dual independent display support
1.6.1.2 Dynamic Video Memory Technology (DVMT 5.0)
DVMT enables enhanced graphics and memory performance through highly efficient
memory utilization. DVMT ensures the most efficient use of available system memory
for maximum 2-D/3-D graphics performance. The amount of system memory
allocated to DVMT varies depending on the amount of total system memory installed
as well as the operating system being used. For Windows Vista*, a minimum of
128 MB can be allocated to DVMT and a maximum of over 2 GB can be allocated to
DVMT with the correct amount of memory installed. DVMT returns system memory
back to the operating system when the additional system memory is no longer
required by the graphics subsystem.
DVMT will always use a minimal fixed portion of system physical memory (as set in the
BIOS Setup program) for compatibility with legacy applications. An example of this
would be when using VGA graphics under DOS. Once loaded, the operating system
and graphics drivers allocate additional system memory to the graphics buffer as
needed for performing graphics functions.
NOTE
The use of DVMT requires operating system driver support.
1.6.1.3 Configuration Modes
The video modes supported by this board are based on the Extended Display
Identification Data (EDID) modes of the monitor to which the system is connected.
Standard monitors are assumed.
1.6.1.4 Analog Display (VGA)
The VGA port supports analog displays. The maximum supported resolution is 2048 x
1536 (QXGA) at a 75 Hz refresh rate.
19
Intel Desktop Board DG41TX Technical Product Specification
1.6.1.5 Advanced Digital Display (ADD2/MEC/ADD2+) Card
Support
The GMCH routes two multiplexed SDVO ports that are each capable of driving up to a
270 MHz pixel clock to the PCI Express x16 connector. When an ADD2/MEC/ADD2+
card is detected, the Intel GMA X4500 graphics controller is enabled and the PCI
Express x16 connector is configured for SDVO mode. SDVO mode enables the SDVO
ports to be accessed by the ADD2/MEC/ADD2+ card. An ADD2/MEC/ADD2+ card can
either be configured to support simultaneous display or can be configured to support
dual independent display as an extended desktop configuration with different color
depths and resolutions with DVI analog output only. ADD2/MEC/ADD2+ cards can be
designed to support the following configurations:
• Low Voltage Differential Signaling (LVDS)
• Single device operating in dual channel mode
• HDTV output
1.6.1.6 PCI Express x16 Graphics
The GMCH also supports add-in discrete graphics card via the PCI Express graphics
connector.
• PCI Express 2.0 x16:
⎯ Supports PCI Express GEN1 frequency of 1.25 GHz resulting in 2.5 Gb/s each
direction (500 MB/s total). Maximum theoretical bandwidth on interface of
4 GB/s in each direction simultaneously, for an aggregate of 8 GB/s when
operating in x16 mode.
⎯ Supports PCI Express GEN2 frequency of 2.5 GHz resulting in 5.0 Gb/s each
direction (1000 MB/s total). Maximum theoretical bandwidth on interface of
8 GB/s in each direction simultaneously, for an aggregate of 16 GB/s when
operating in x16 mode.
For information about Refer to
PCI Express technology http://www.pcisig.com
1.6.2 USB
The board supports up to eight USB 2.0 ports, supports UHCI and EHCI, and uses
UHCI- and EHCI-compatible drivers.
The ICH7 provides the USB controller for all ports. The port arrangement is as
follows:
• Four ports are implemented with stacked back panel connectors
• Four ports are routed to two separate front panel USB headers
For information about Refer to
The location of the USB connectors on the back panel Figure 9, page 43
The location of the front panel USB headers Figure 10, page 44
20
Product Description
1.6.3 Serial ATA Interfaces
The board’s Serial ATA controller offers four independent Serial ATA ports with a
theoretical maximum transfer rate of 3 Gbits/s per port. One device can be installed
on each port for a maximum of four Serial ATA devices. A point-to-point interface is
used for host to device connections, unlike Parallel ATA IDE which supports a
master/slave configuration and two devices per channel.
For compatibility, the underlying Serial ATA functionality is transparent to the
operating system. The Serial ATA controller can operate in both legacy and native
modes. In legacy mode, standard IDE I/O and IRQ resources are assigned (IRQ 14
and 15). In Native mode, standard Conventional PCI bus resource steering is used.
Native mode is the preferred mode for configurations using the Windows* XP
operating system.
NOTE
Many Serial ATA drives use new low-voltage power connectors and require adapters or
power supplies equipped with low-voltage power connectors.
For more information, see: http://www.serialata.org/
For information about Refer to
The location of the Serial ATA connectors Figure 10, page 44
21
Intel Desktop Board DG41TX Technical Product Specification
1.7 Parallel ATA IDE Controller
The Parallel ATA IDE controller has one bus-mastering Parallel ATA IDE interface. The
Parallel ATA IDE interface supports the following modes:
• Programmed I/O (PIO): processor controls data transfer.
• 8237-style DMA: DMA offloads the processor, supporting transfer rates of up to
16 MB/s.
• Ultra DMA: DMA protocol on IDE bus supporting host and target throttling and
transfer rates of up to 33 MB/s.
• ATA-66: DMA protocol on IDE bus supporting host and target throttling and
transfer rates of up to 66 MB/s. ATA-66 protocol is similar to Ultra DMA and is
device driver compatible.
• ATA-100: DMA protocol on IDE bus allows host and target throttling. The ATA-100
logic can achieve read transfer rates up to 100 MB/s and write transfer rates up to
88 MB/s.
NOTE
ATA-66 and ATA-100 are faster timings and require a specialized cable to reduce
reflections, noise, and inductive coupling.
The Parallel ATA IDE interface also supports ATAPI devices (such as CD-ROM drives)
and ATA devices. The BIOS supports Logical Block Addressing (LBA) and Extended
Cylinder Head Sector (ECHS) translation modes. The drive reports the transfer rate
and translation mode to the BIOS.
For information about Refer to
The location of the Parallel ATA IDE connector Figure 10, page 44
22
Product Description
1.8 Real-Time Clock Subsystem
A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When
the computer is not plugged into a wall socket, the battery has an estimated life of
three years. When the computer is plugged in, the standby current from the power
supply extends the life of the battery. The clock is accurate to ± 13 minutes/year at
25 ºC with 3.3 VSB applied.
NOTE
If the battery and AC power fail, custom defaults, if previously saved, will be loaded
into CMOS RAM at power-on.
When the voltage drops below a certain level, the BIOS Setup program settings stored
in CMOS RAM (for example, the date and time) might not be accurate. Replace the
battery with an equivalent one. Figure 1 on page 11 shows the location of the battery.
1.9 Legacy I/O Controller
The I/O controller provides the following features:
• One serial port header
• Serial IRQ interface compatible with serialized IRQ support for PCI systems
• PS/2-style keyboard/mouse interfaces
• One parallel port back panel connector
• Intelligent power management, including a programmable wake-up event interface
• PCI power management support
The BIOS Setup program provides configuration options for the I/O controller.
1.9.1 Serial Port Interface
The serial port header is located on the component side of the board. The serial port
supports data transfers at speeds up to 115.2 kbits/s with BIOS support.
For information about Refer to
The location of the serial port header Figure 10, page 44
The serial port header signal mapping Table 12, page 46
23
Intel Desktop Board DG41TX Technical Product Specification
1.9.2 PS/2 Interfaces
The PS/2 connectors are located on the back panel.
NOTE
Power to the computer should be turned off before a keyboard or mouse is connected
or disconnected.
For information about Refer to
The location of the PS/2 connectors Figure 9, page 43
1.10 Audio Subsystem
The onboard audio subsystem consists of the following:
• Intel 82801GB (ICH7)
• Realtek ALC888VC audio codec
• Back panel audio connectors
• Component-side audio headers/connectors:
⎯ Intel High Definition Audio front panel header/AC ‘97
⎯ Intel High Definition Audio Link header
⎯ S/PDIF Audio out header
The audio subsystem supports the following features:
• A signal-to-noise (S/N) ratio of 95 dB
• Independent 5.1 audio playback from back panel connectors and stereo playback
from the Intel High Definition Audio front panel header
NOTE
Systems built with an AC ‘97 front panel will not be able to obtain the Microsoft
Windows Vista logo.
Table 4 lists the supported functions of the front panel and back panel audio jacks.
Table 4. Audio Jack Retasking Support
Micro- Head- Front Rear Center/
Audio Jack phone phones Speaker Line In Surround Sub
FP Green Ctrl Panel Default
FP Pink Default
Rear Blue Default Ctrl Panel
Rear Green Ctrl panel Default
Rear Pink Default Ctrl Panel
24
Product Description
1.10.1 Audio Subsystem Software
Audio software and drivers are available from Intel’s World Wide Web site.
For information about Refer to
Obtaining audio software and drivers Section 1.2, page 14
1.10.2 Audio Connectors and Headers
The board contains audio connectors on the back panel and audio headers on the
component side of the board. The front panel audio header provides mic in and line
out signals for the front panel. Microphone bias is supported for both the front and
back panel microphone connectors.
The audio headers and connectors are configurable through the audio device drivers.
The available configurable back panel audio connectors are shown in Figure 4.
Item Description
A Line in
B Line out
C Mic in
Figure 4. Back Panel Audio Connector Options
NOTE
The back panel audio line out connector is designed to power headphones or amplified
speakers only. Poor audio quality occurs if passive (non-amplified) speakers are
connected to this output.
For information about Refer to
The location of the front panel audio header Figure 10, page 44
The signal names of the front panel audio header Table 16, page 47
The back panel audio connectors Section 2.2.1, page 43
25
Intel Desktop Board DG41TX Technical Product Specification
1.11 LAN Subsystem
The LAN subsystem consists of the following:
• Intel 82801GB ICH7
• Broadcom BCM57788 Gigabit Ethernet Controller for 10/100/1000 Mbits/s Ethernet
LAN connectivity
• RJ-45 LAN connector with integrated status LEDs
Additional features of the LAN subsystem include:
• CSMA/CD protocol engine
• LAN connect interface between ICH7 and the LAN controller
• Conventional PCI bus power management
⎯ ACPI technology support
⎯ LAN wake capabilities
• LAN subsystem software
For information about Refer to
LAN software and drivers http://downloadcenter.intel.com
1.11.1 LAN Subsystem Software
LAN software and drivers are available from Intel’s World Wide Web site.
For information about Refer to
Obtaining LAN software and drivers Section 1.2, page 14
26
Product Description
1.11.2 RJ-45 LAN Connector with Integrated LEDs
Two LEDs are built into the RJ-45 LAN connector (shown in Figure 5).
Item Description
A Link LED (Green)
B Data Rate LED (Green/Yellow)
Figure 5. LAN Connector LED Locations
Table 5 describes the LED states when the board is powered up and the LAN
subsystem is operating.
Table 5. LAN Connector LED States
LED LED Color LED State Condition
Off LAN link is not established.
Link Green
On LAN link is established.
Blinking LAN activity is occurring.
Off 10 Mbits/s data rate is selected.
Data Rate Green/Yellow Green 100 Mbits/s data rate is selected.
Yellow 1000 Mbits/s data rate is selected.
27
Intel Desktop Board DG41TX Technical Product Specification
1.12 Hardware Management Subsystem
The hardware management features enable the board to be compatible with the Wired
for Management (WfM) specification. The board has several hardware management
features, including the following:
• Fan monitoring and control
• Thermal and voltage monitoring
• Chassis intrusion detection
1.12.1 Hardware Monitoring and Fan Control
The features of the hardware monitoring and fan control include:
• SIO smart fan control, delivering acoustically-optimized thermal management
• Fan speed control controllers and sensors integrated into the SIO
• Three thermal sensors (processor, 82G41 GMCH, and 82801GB ICH7)
• Power supply monitoring of five voltages (+5 Vsb, +5V, +12 V, +3.3 V, and
+VCCP) to detect levels above or below acceptable values
• Thermally monitored closed-loop fan control, for both fans, that can adjust the fan
speed according to thermal conditions
1.12.2 Fan Monitoring
Fan monitoring can be implemented using third-party software. The level of
monitoring and control is dependent on the I/O controller used with the board.
For information about Refer to
The functions of the fan headers Section 1.13.2.2, page 34
Location of the fan headers Figure 6, page 29
1.12.3 Chassis Intrusion Detection
The board supports a chassis security feature that detects if the chassis cover is
removed. The security feature uses a mechanical switch on the chassis that attaches
to the chassis intrusion header. When the chassis cover is removed, the mechanical
switch is in the closed position.
For information about Refer to
The location of the chassis intrusion header Figure 10, page 44
28
Product Description
1.12.4 Thermal Monitoring
Figure 6 shows the locations of the thermal sensors and fan headers.
Item Description
A Rear chassis fan header
B Thermal diode, located on the processor die
C Thermal diode, located on the GMCH die
D Processor fan header
E Thermal diode, located on the ICH7 die
F Front chassis fan header
Figure 6. Thermal Sensors and Fan Headers
NOTE
The minimum thermal reporting threshold for the GMCH is 66 °C. The GMCH thermal
sensor will display 66 °C until the temperature rises above this point.
29
Intel Desktop Board DG41TX Technical Product Specification
1.13 Power Management
Power management is implemented at several levels, including:
• Software support through Advanced Configuration and Power Interface (ACPI)
• Hardware support:
⎯ Power connector
⎯ Fan headers
⎯ LAN wake capabilities
⎯ Instantly Available PC technology
⎯ Wake from USB
⎯ Power Management Event signal (PME#) wake-up support
⎯ WAKE# signal wake-up support
⎯ Wake from serial port
⎯ Wake from PS/2 devices
1.13.1 ACPI
ACPI gives the operating system direct control over the power management and Plug
and Play functions of a computer. The use of ACPI with the board requires an
operating system that provides full ACPI support. ACPI features include:
• Plug and Play (including bus and device enumeration)
• Power management control of individual devices, add-in boards (some add-in
boards may require an ACPI-aware driver), video displays, and hard disk drives
• Methods for achieving less than 15-watt system operation in the power-on/standby
sleeping state
• A Soft-off feature that enables the operating system to power-off the computer
• Support for multiple wake-up events (see Table 8 on page 32)
• Support for a front panel power and sleep mode switch
Table 6 lists the system states based on how long the power switch is pressed,
depending on how ACPI is configured with an ACPI-aware operating system.
Table 6. Effects of Pressing the Power Switch
If the system is in this …and the power switch
state… is pressed for …the system enters this state
Off Less than four seconds Power-on
(ACPI G2/G5 – Soft off) (ACPI G0 – working state)
On Less than four seconds Soft-off/Standby
(ACPI G0 – working state) (ACPI G1 – sleeping state)
On More than four seconds Fail safe power-off
(ACPI G0 – working state) (ACPI G2/G5 – Soft off)
Sleep Less than four seconds Wake-up
(ACPI G1 – sleeping state) (ACPI G0 – working state)
Sleep More than four seconds Power-off
(ACPI G1 – sleeping state) (ACPI G2/G5 – Soft off)
30
Product Description
1.13.1.1 System States and Power States
Under ACPI, the operating system directs all system and device power state
transitions. The operating system puts devices in and out of low-power states based
on user preferences and knowledge of how devices are being used by applications.
Devices that are not being used can be turned off. The operating system uses
information from applications and user settings to put the system as a whole into a
low-power state.
Table 7 lists the power states supported by the board along with the associated
system power targets. See the ACPI specification for a complete description of the
various system and power states.
Table 7. Power States and Targeted System Power
Global Processor Targeted System
(Note 1)
States Sleeping States States Device States Power
G0 – working S0 – working C0 – working D0 – working Full power > 30 W
state state.
G1 – sleeping S1 – Processor C1 – stop D1, D2, D3 – 5 W < power < 52.5 W
state stopped grant device
specification
specific.
(Note 2)
G1 – sleeping S3 – Suspend to No power D3 – no power Power < 5 W
state RAM. Context except for
saved to RAM. wake-up logic.
(Note 2)
G1 – sleeping S4 – Suspend to No power D3 – no power Power < 5 W
state disk. Context except for
saved to disk. wake-up logic.
(Note 2)
G2/S5 S5 – Soft off. No power D3 – no power Power < 5 W
Context not saved. except for
Cold boot is wake-up logic.
required.
G3 – No power to the No power D3 – no power for No power to the system.
mechanical off. system. wake-up logic, Service can be performed
AC power is except when safely.
disconnected provided by
from the battery or
computer. external source.
Notes:
1. Total system power is dependent on the system configuration, including add-in boards and peripherals
powered by the system chassis’ power supply.
2. Dependent on the standby power consumption of wake-up devices used in the system.
31
Intel Desktop Board DG41TX Technical Product Specification
1.13.1.2 Wake-up Devices and Events
Table 8 lists the devices or specific events that can wake the computer from specific
states.
Table 8. Wake-up Devices and Events
These devices/events can wake up the computer… …from this state
LAN S1, S3, S4, S5
PME# signal S1, S3, S4, S5
Power switch S1, S3, S4, S5
PS/2 devices S1, S3, S4, S5
RTC alarm S1, S3, S4, S5
Serial port S1, S3
USB S1, S3
WAKE# signal S1, S3, S4, S5
Notes:
• S4 implies operating system support only.
• USB ports are turned off during S4/S5 states.
• The PCI Express WAKE# signal is controlled by the enable/disable option in the BIOS.
NOTE
The use of these wake-up events from an ACPI state requires an operating system
that provides full ACPI support. In addition, software, drivers, and peripherals must
fully support ACPI wake events.
32
Product Description
1.13.2 Hardware Support
CAUTION
Ensure that the power supply provides adequate +5 V standby current if LAN wake
capabilities and Instantly Available PC technology features are used. Failure to do so
can damage the power supply. The total amount of standby current required depends
on the wake devices supported and manufacturing options.
The board provides several power management hardware features, including:
• Power connector
• Fan headers
• LAN wake capabilities
• Instantly Available PC technology
• Wake from USB
• PME# signal wake-up support
• WAKE# signal wake-up support
• Wake from PS/2 devices
• Wake from serial port
LAN wake capabilities and Instantly Available PC technology require power from the
+5 V standby line.
NOTE
The use of Wake from USB from an ACPI state requires an operating system that
provides full ACPI support.
1.13.2.1 Power Connector
ATX12V-compliant power supplies can turn off the system power through system
control. When an ACPI-enabled system receives the correct command, the power
supply removes all non-standby voltages.
When resuming from an AC power failure, the computer returns to the power state it
was in before power was interrupted (on or off). The computer’s response can be set
using the Last Power State feature in the BIOS Setup program’s Boot menu.
For information about Refer to
The location of the main power connector Figure 10, page 44
The signal names of the main power connector Table 21, page 49
33
Intel Desktop Board DG41TX Technical Product Specification
1.13.2.2 Fan Headers
The function/operation of the fan headers is as follows:
• The fans are on when the board is in the S0 state.
• The fans are off when the board is off or in the S3, S4, or S5 state.
• The processor fan header is wired to a fan tachometer input. The rear fan header
has independent tachometer input to the hardware monitoring and fan control
device. All fan headers support closed-loop fan control that can adjust the fan
speed according to thermal conditions.
• All fan headers have a +12 V DC connection.
For information about Refer to
The locations of the fan headers and thermal sensors Figure 6, page 29
The signal names of the processor fan header Table 14, page 46
Table 15, page 46
The signal names of the chassis fan header
1.13.2.3 LAN Wake Capabilities
CAUTION
For LAN wake capabilities, the +5 V standby line from the power supply must be
capable of providing adequate +5 V standby current. Failure to provide adequate
standby current when implementing LAN wake capabilities can damage the power
supply.
LAN wake capabilities enable remote wake-up of the computer through a network.
The LAN subsystem PCI bus network adapter monitors network traffic at the Media
Independent Interface. Upon detecting a Magic Packet* frame, the LAN subsystem
asserts a wake-up signal that powers up the computer. Depending on the LAN
implementation, the board supports LAN wake capabilities with ACPI in the following
ways:
• The PCI Express WAKE# signal
• The PCI bus PME# signal for PCI 2.3 compliant LAN designs
• The onboard LAN subsystem
34
Product Description
1.13.2.4 Instantly Available PC Technology
CAUTION
For Instantly Available PC technology, the +5 V standby line from the power supply
must be capable of providing adequate +5 V standby current. Failure to provide
adequate standby current when implementing Instantly Available PC technology can
damage the power supply.
Instantly Available PC technology enables the board to enter the ACPI S3 (Suspend-to-
RAM) sleep-state. While in the S3 sleep-state, the computer will appear to be off (the
power supply is off, and the front panel LED is amber if dual colored, or off if single
colored.) When signaled by a wake-up device or event, the system quickly returns to
its last known wake state. Table 8 on page 32 lists the devices and events that can
wake the computer from the S3 state.
The board supports the PCI Bus Power Management Interface Specification. Add-in
boards that also support this specification can participate in power management and
can be used to wake the computer.
The use of Instantly Available PC technology requires operating system support and
PCI 2.3 compliant add-in cards and drivers.
1.13.2.5 Wake from USB
USB bus activity wakes the computer from ACPI S1 or S3 state.
NOTE
Wake from USB requires the use of a USB peripheral that supports Wake from USB
and support in the operating system.
1.13.2.6 PME# Signal Wake-up Support
When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI
S1, S3, S4, or S5 state (with Wake on PME enabled in BIOS).
1.13.2.7 WAKE# Signal Wake-up Support
When the WAKE# signal on the PCI Express bus is asserted, the computer wakes from
an ACPI S1, S3, S4, or S5 state.
1.13.2.8 Wake from PS/2 Devices
PS/2 device activity wakes the computer from an ACPI S1, S3, S4, and S5 state.
NOTE
PS/2 wake from S4 and S5 states using the special keyboard key (the keyboard
power-on key) must have the keyboard power-on enable/disable option in the BIOS
enabled.
35
Intel Desktop Board DG41TX Technical Product Specification
1.13.2.9 Wake from Serial Port
Serial port activity wakes the computer from an ACPI S1 or S3 state.
1.13.2.10 +5 V Standby Power Indicator LED
The +5 V standby power indicator LED shows that power is still present even when the
computer appears to be off. Figure 7 shows the location of the standby power
indicator LED.
CAUTION
If AC power has been switched off and the standby power indicator is still lit,
disconnect the power cord before installing or removing any devices connected to the.
Failure to do so could damage the board and any attached devices.
Figure 7. Location of the Standby Power Indicator LED
36
Product Description
1.13.3 ENERGY STAR*, e-Standby, and EuP Compliance
The US Department of Energy and the US Environmental Protection Agency have
continually revised the ENERGY STAR requirements. Intel has worked directly with
these two governmental agencies in the definition of new requirements.
Intel Desktop Board DG41TX meets the following program requirements in an
adequate system configuration, including appropriate selection of an efficient power
supply:
• Energy Star v5.0, category B
• EPEAT*
• Korea e-Standby
• European Union Energy-related Products Directive 2009 (ErP)
For information about Refer to
ENERGY STAR requirements and recommended configurations http://www.intel.com/go/energystar
Electronic Product Environmental Assessment Tool (EPEAT) http://www.epeat.net/
Korea e-Standby Program http://www.kemco.or.kr/new_eng/pg02/
pg02100300.asp
European Union Energy-related Products Directive 2009 (ErP) http://ec.europa.eu/enterprise/policies/s
ustainable-business/sustainable-product-
policy/ecodesign/index_en.htm
37
Intel Desktop Board DG41TX Technical Product Specification
38
2 Technical Reference
2.1 Memory Map
2.1.1 Addressable Memory
The board utilizes 4 GB of addressable system memory. Typically the address space
that is allocated for Conventional PCI bus add-in cards, PCI Express configuration
space, BIOS (SPI Flash), and chipset overhead resides above the top of DRAM (total
system memory). On a system that has 4 GB of system memory installed, it is not
possible to use all of the installed memory due to system address space being
allocated for other system critical functions. These functions include the following:
• BIOS/SPI Flash (16 Mbits)
• Local APIC (19 MB)
• Direct Media Interface (40 MB)
• Front side bus interrupts (17 MB)
• PCI Express configuration space (256 MB)
• GMCH base address registers, internal graphics ranges, PCI Express ports (up to
512 MB)
• Memory-mapped I/O that is dynamically allocated for Conventional PCI bus and
PCI Express add-in cards
• Base graphics memory support (1 MB or 8 MB)
NOTE
System resources and hardware (such as Conventional PCI and PCI Express*) require
physical memory address locations that can reduce available addressable system
memory. This could result in a reduction of as much as 1 GB or more of physical
addressable memory being available to the operating system and applications,
depending on the system configuration and operating system.
39
Intel Desktop Board DG41TX Technical Product Specification
The amount of installed memory that can be used will vary based on add-in cards and
BIOS settings. Figure 8 shows a schematic of the system memory map. All installed
system memory can be used when there is no overlap of system addresses.
Figure 8. Detailed System Memory Address Map
40
Technical Reference
Table 9 lists the system memory map.
Table 9. System Memory Map
Address Range Address Range
(decimal) (hex) Size Description
1024 K - 4194304 K 100000 - FFFFFFFF 4095 MB Extended memory
960 K - 1024 K F0000 - FFFFF 64 KB Runtime BIOS
896 K - 960 K E0000 - EFFFF 64 KB Reserved
800 K - 896 K C8000 - DFFFF 96 KB Potential available high DOS
memory (open to the PCI bus).
Dependent on video adapter used.
640 K - 800 K A0000 - C7FFF 160 KB Video memory and BIOS
639 K - 640 K 9FC00 - 9FFFF 1 KB Extended BIOS data (movable by
memory manager software)
512 K - 639 K 80000 - 9FBFF 127 KB Extended conventional memory
0 K - 512 K 00000 - 7FFFF 512 KB Conventional memory
41
Intel Desktop Board DG41TX Technical Product Specification
2.2 Connectors and Headers
CAUTION
Only the following connectors and headers have overcurrent protection: Back panel
and front panel USB, VGA, and PS/2.
The other internal connectors/headers are not overcurrent protected and should
connect only to devices inside the computer’s chassis, such as fans and internal
peripherals. Do not use these connectors/headers to power devices external to the
computer’s chassis. A fault in the load presented by the external devices could cause
damage to the computer, the power cable, and the external devices themselves.
Furthermore, improper connection of USB header signal wire connectors may
eventually overload the overcurrent protection and cause damage to the board.
NOTE
Computer systems that have an unshielded cable attached to a USB port may not
meet FCC Class B requirements, even if no device is attached to the cable. Use
shielded cable that meets the requirements for full-speed devices.
This section describes the board’s connectors and headers. The connectors and
headers can be divided into these groups:
• Back panel I/O connectors (see page 43)
• Component-side connectors and headers (see page 44)
42
Technical Reference
2.2.1 Back Panel Connectors
Figure 9 shows the locations of the back panel connectors.
Item Description
A PS/2 keyboard/mouse port
B PS/2 keyboard/mouse port
C VGA output
D Parallel port
E DVI-D output
F USB ports (2)
G LAN
H USB ports (2)
I Line in
J Line out
K Mic in
Figure 9. Back Panel Connectors
43
Intel Desktop Board DG41TX Technical Product Specification
2.2.2 Component-side Connectors and Headers
Figure 10 shows the locations of the component-side connectors and headers.
Figure 10. Component-side Connectors and Headers
44
Technical Reference
Table 10 lists the component-side connectors and headers identified in Figure 10.
Table 10. Component-side Connectors and Headers Shown in Figure 10
Item/callout
from Figure 1 Description
A Front panel audio header
B Conventional PCI bus add-in card connector
C Conventional PCI bus add-in card connector
D PCI Express x1 bus add-in card connector
E PCI Express x16 bus add-in card connector
F Processor core power connector (2 x 2)
G Rear chassis fan header
H Battery
I Processor fan header
J Diskette drive connector
K Parallel ATA IDE connector
L Main power connector (2 x 12)
M Serial ATA connectors (4)
N Front chassis fan header
O Chassis intrusion header
P Front panel USB header
Q Front panel USB header
R Front panel header
S Alternate front panel power LED header
T Serial port header
U Intel High Definition Audio Link header
V S/PDIF header
45
Intel Desktop Board DG41TX Technical Product Specification
2.2.2.1 Signal Tables for the Connectors and Headers
Table 11. Serial ATA Connectors
Pin Signal Name
1 Ground
2 TXP
3 TXN
4 Ground
5 RXN
6 RXP
7 Ground
Table 12. Serial Port Header
Pin Signal Name Pin Signal Name
1 DCD 2 RXD#
3 TXD# 4 DTR
5 Ground 6 DSR
7 RTS 8 CTS
9 RI 10 Key (no pin)
Table 13. Chassis Intrusion Header
Pin Signal Name
1 Intruder#
2 Ground
Table 14. Processor (4-pin) Fan Header
Pin Signal Name
1 Ground
2 +12 V
3 FAN_TACH
4 FAN_CONTROL
Table 15. Front and Rear Chassis Fan Headers
Pin 4-Wire Support Pin 3-Wire Support
1 Ground 3 Ground
2 +12 V 2 FAN_POWER
3 FAN_TACH 1 FAN_TACH
4 FAN_CONTROL N/A N/A
46
Technical Reference
Table 16. Front Panel Audio Header for Intel HD Audio
Pin Signal Name Pin Signal Name
1 [Port 1] Left channel 2 Ground
3 [Port 1] Right channel 4 PRESENCE# (Dongle present)
5 [Port 2] Right channel 6 [Port 1] SENSE_RETURN
7 SENSE_SEND (Jack detection) 8 Key (no pin)
9 [Port 2] Left channel 10 [Port 2] SENSE_RETURN
Table 17. Front Panel Audio Header for AC ’97 Audio
Pin Signal Name Pin Signal Name
1 MIC 2 AUD_GND
3 MIC_BIAS 4 AUD_GND
5 FP_OUT_R 6 FP_RETURN_R
7 N/A 8 Key (no pin)
9 FP_OUT_L 10 FP_RETURN_L
Table 18. Intel HD Audio Link Header
Pin Signal Name Pin Signal Name
1 BCLK 2 Ground
3 RST# 4 DVDD IO
5 SYNC 6 Ground
7 SDO 8 3.3 V DVDD CORE
9 SDI0 10 +12 V
11 SDI1 12 Key (no pin)
13 Not connected 14 3.3 V DUAL
15 Not connected 16 Ground
Table 19. S/PDIF Header
Pin Signal Name
1 Ground
2 S/PDIF out
3 Key (no pin)
3 +5V_DC
47
Intel Desktop Board DG41TX Technical Product Specification
2.2.2.2 Add-in Card Connectors
The board has the following add-in card connectors:
• One PCI Express 2.0 x16: this connector supports simultaneous transfer speeds of
up to 8 GB/s of peak bandwidth per direction.
• One PCI Express 1.1 x1: each of these connectors support simultaneous transfer
speeds of up to 500 MB/s of peak bandwidth per direction.
• Two Conventional PCI bus (rev 2.3 compliant) connectors.
Note the following considerations for the Conventional PCI bus connectors:
• All of the Conventional PCI bus connectors are bus master capable.
• SMBus signals are routed to all Conventional PCI bus connectors. This enables
Conventional PCI bus add-in boards with SMBus support to access sensor data on
the board. The specific SMBus signals are as follows:
⎯ The SMBus clock line is connected to pin A40.
⎯ The SMBus data line is connected to pin A41.
48
Technical Reference
2.2.2.3 Power Supply Connectors
The board has the following power supply connectors:
• Main power – a 2 x 12 connector. This connector is compatible with 2 x 10
connectors previously used on Intel Desktop boards. The board supports the use
of ATX12V power supplies with either 2 x 10 or 2 x 12 main power cables. When
using a power supply with a 2 x 10 main power cable, attach that cable on the
rightmost pins of the main power connector, leaving pins 11, 12, 23, and
24 unconnected.
• Processor core power – a 2 x 2 connector. This connector provides power
directly to the processor voltage regulator and must always be used. Failure to do
so will prevent the board from booting.
Table 20. Processor Core Power Connector
Pin Signal Name Pin Signal Name
1 Ground 2 Ground
3 +12 V 4 +12 V
Table 21. Main Power Connector
Pin Signal Name Pin Signal Name
1 +3.3 V 13 +3.3 V
2 +3.3 V 14 -12 V
3 Ground 15 Ground
4 +5 V 16 PS-ON# (power supply remote on/off)
5 Ground 17 Ground
6 +5 V 18 Ground
7 Ground 19 Ground
8 PWRGD (Power Good) 20 No connect
9 +5 V (Standby) 21 +5 V
10 +12 V 22 +5 V
(Note) (Note)
11 +12 V 23 +5 V
(Note) (Note)
12 24
2 x 12 connector detect Ground
Note: When using a 2 x 10 power supply cable, this pin will be unconnected.
For information about Refer to
Power supply considerations Section 2.5.1, page 56
49
Intel Desktop Board DG41TX Technical Product Specification
2.2.2.4 Front Panel Header
This section describes the functions of the front panel header. Table 22 lists the signal
names of the front panel header. Figure 11 is a connection diagram for the front panel
header.
Table 22. Front Panel Header
In/ In/
Pin Signal Out Description Pin Signal Out Description
Hard Drive Activity LED Power LED
1 HD_PWR Out Hard disk LED pull-up 2 HDR_BLNK_ Out Front panel green
to +5 V GRN LED
3 HDA# Out Hard disk active LED 4 HDR_BLNK_ Out Front panel yellow
YEL LED
Reset Switch On/Off Switch
5 Ground Ground 6 FPBUT_IN In Power switch
7 FP_RESET# In Reset switch 8 Ground Ground
Power Not Connected
9 +5 V Power 10 N/C Not connected
Figure 11. Connection Diagram for Front Panel Header
2.2.2.4.1 Hard Drive Activity LED Header
Pins 1 and 3 can be connected to an LED to provide a visual indicator that data is
being read from or written to a hard drive. Proper LED function requires one of the
following:
• A Serial ATA hard drive connected to an onboard Serial ATA connector
• A Parallel ATA IDE hard drive connected to an onboard Parallel ATA IDE connector
50
Technical Reference
2.2.2.4.2 Reset Switch Header
Pins 5 and 7 can be connected to a momentary single pole, single throw (SPST) type
switch that is normally open. When the switch is closed, the board resets and runs the
POST.
2.2.2.4.3 Power/Sleep LED Header
Pins 2 and 4 can be connected to a one- or two-color LED. Table 23 shows the
possible states for a one-color LED. Table 24 shows the possible states for a two-color
LED.
Table 23. States for a One-Color Power LED
LED State Description
Off Power off/sleeping
Steady Green Running
Table 24. States for a Two-Color Power LED
LED State Description
Off Power off
Steady Green Running
Steady Yellow Sleeping
NOTE
The colors listed in Table 23 and Table 24 are suggested colors only. Actual LED
colors are chassis-specific.
2.2.2.4.4 Power Switch Header
Pins 6 and 8 can be connected to a front panel momentary-contact power switch. The
switch must pull the SW_ON# pin to ground for at least 50 ms to signal the power
supply to switch on or off. (The time requirement is due to internal debounce circuitry
on the board.) At least two seconds must pass before the power supply will recognize
another on/off signal.
2.2.2.5 Alternate Front Panel Power LED Header
Pins 1 and 3 of this header duplicate the signals on pins 2 and 4 of the front panel
header.
Table 25. Alternate Front Panel Power LED Header
Pin Signal Name In/Out Description
1 HDR_BLNK_GRN Out Front panel green LED
2 Not connected
3 HDR_BLNK_YEL Out Front panel yellow LED
51
Intel Desktop Board DG41TX Technical Product Specification
2.2.2.6 Front Panel USB Headers
Figure 12 is a connection diagram for the front panel USB headers.
NOTES
The +5 V DC power on the front panel USB headers is fused.
Use only a front panel USB connector that conforms to the USB 2.0 specification for
high-speed USB devices.
Figure 12. Connection Diagram for Front Panel USB Headers
52
Technical Reference
2.3 Jumper Block
CAUTION
Do not move the jumper with the power on. Always turn off the power and unplug the
power cord from the computer before changing a jumper setting. Otherwise, the
board could be damaged.
Figure 13 shows the location of the jumper block. The jumper determines the BIOS
Setup program’s mode. Table 26 lists the jumper settings for the three modes:
normal, configure, and recovery. When the jumper is set to configure mode and the
computer is powered-up, the BIOS compares the processor version and the microcode
version in the BIOS and reports if the two match.
Figure 13. Location of the Jumper Block
53
Intel Desktop Board DG41TX Technical Product Specification
Table 26. BIOS Setup Configuration Jumper Settings
Function/Mode Jumper Setting Configuration
The BIOS uses current configuration information and
Normal 1-2
passwords for booting.
After the POST runs, Setup runs automatically. The
Configure 2-3
maintenance menu is displayed.
The BIOS attempts to recover the BIOS configuration. See
Recovery None
Section 3.7 for more information on BIOS recovery.
54
Technical Reference
2.4 Mechanical Considerations
2.4.1 Form Factor
The board is designed to fit into an ATX-form-factor chassis. Figure 14 illustrates the
mechanical form factor of the board. Dimensions are given in inches [millimeters].
The outer dimensions are 9.60 inches by 8.60 inches [243.84 millimeters by
218.44 millimeters]. Location of the I/O connectors and mounting holes are in
compliance with the ATX specification.
Figure 14. Board Dimensions
55
Intel Desktop Board DG41TX Technical Product Specification
2.5 Electrical Considerations
2.5.1 Power Supply Considerations
CAUTION
The +5 V standby line from the power supply must be capable of providing adequate
+5 V standby current. Failure to do so can damage the power supply. The total
amount of standby current required depends on the wake devices supported and
manufacturing options.
Additional power required will depend on configurations chosen by the integrator.
The power supply must comply with the indicated parameters of the ATX form factor
specification.
• The potential relation between 3.3 VDC and +5 VDC power rails
• The current capability of the +5 VSB line
• All timing parameters
• All voltage tolerances
For example, for a system consisting of a supported 65 W processor (see Section 1.4
on page 14 for a list of supported processors), 1 GB DDR3 RAM, one hard disk drive,
one optical drive, and all board peripherals enabled, the minimum recommended
power supply is 300 W. Table 27 lists the recommended power supply current values.
Table 27. Recommended Power Supply Current Values
3.3 V 5 V 12 V1 12 V2 -12 V 5 VSB
Output Voltage
15 A 15 A 10 A 10 A 0.3 A 3.0 A
Current
56
Technical Reference
2.5.2 Fan Header Current Capability
CAUTION
The processor fan must be connected to the processor fan header, not to a chassis fan
header. Connecting the processor fan to a chassis fan header may result in onboard
component damage that will halt fan operation.
Table 28 lists the current capability of the fan headers.
Table 28. Fan Header Current Capability
Fan Header Maximum Available Current
Processor fan 2.0 A
Rear chassis fan 1.5 A
Front chassis fan 1.5 A
2.5.3 Add-in Board Considerations
The board is designed to provide 2 A (average) of +5 V current for each add-in board.
The total +5 V current draw for add-in boards for a fully loaded board (both expansion
slots filled and the PCI Express x16 connector filled) must not exceed 8 A.
2.6 Thermal Considerations
CAUTION
Failure to ensure appropriate airflow may result in reduced performance of both the
processor and/or voltage regulator or, in some instances, damage to the board. For a
list of chassis that have been tested with Intel desktop boards please refer to the
following website:
http://www3.intel.com/cd/channel/reseller/asmo-na/eng/tech_reference/53211.htm
All responsibility for determining the adequacy of any thermal or system design
remains solely with the reader. Intel makes no warranties or representations that
merely following the instructions presented in this document will result in a system
with adequate thermal performance.
CAUTION
Ensure that the ambient temperature does not exceed the board’s maximum operating
temperature. Failure to do so could cause components to exceed their maximum case
temperature and malfunction. For information about the maximum operating
temperature, see the environmental specifications in Section 2.8.
57
Intel Desktop Board DG41TX Technical Product Specification
CAUTION
Ensure that proper airflow is maintained in the processor voltage regulator circuit.
Failure to do so may result in damage to the voltage regulator circuit. The processor
o
voltage regulator area (shown in Figure 15) can reach a temperature of up to 95 C in
an open chassis.
Figure 15 shows the locations of the localized high temperature zones.
Item Description
A Processor voltage regulator area
B Processor
C Intel 82G41 GMCH
D Intel 82801GB (ICH7)
Figure 15. Localized High Temperature Zones
58
Technical Reference
Table 29 provides maximum case temperatures for the board components that are
sensitive to thermal changes. The operating temperature, current load, or operating
frequency could affect case temperatures. Maximum case temperatures are important
when considering proper airflow to cool the board.
Table 29. Thermal Considerations for Components
Component Maximum Case Temperature
Processor For processor case temperature, see processor datasheets and
processor specification updates
o
Intel 82G41 GMCH 102 C (under bias)
o
Intel 82801GB (ICH7) 108 C (under bias)
For information about Refer to
Processor datasheets and specification updates Section 1.2, page 14
2.7 Reliability
The Mean Time Between Failures (MTBF) prediction is calculated using component and
subassembly random failure rates. The calculation is based on the Telcordia SR-332,
Method I Case 1 50% electrical stress, 40 ºC ambient. The MTBF prediction is used to
estimate repair rates and spare parts requirements.
The MTBF data is calculated from predicted data at 40 ºC. The Intel Desktop Board
DG41TX MTBF is 484,154 hours.
59
Intel Desktop Board DG41TX Technical Product Specification
2.8 Environmental
Table 30 lists the environmental specifications for the board.
Table 30. Intel Desktop Board DG41TX Environmental Specifications
Parameter Specification
Temperature
Non-Operating -20 °C to +70 °C
Operating 0 °C to +55 °C
Shock
Unpackaged 50 g trapezoidal waveform
Velocity change of 170 inches/second²
Packaged Half sine 2 millisecond
Product weight (pounds) Free fall (inches) Velocity change
(inches/sec²)
<20 36 167
21-40 30 152
41-80 24 136
81-100 18 118
Vibration
Unpackaged 5 Hz to 20 Hz: 0.01 g² Hz sloping up to 0.02 g² Hz
20 Hz to 500 Hz: 0.02 g² Hz (flat)
Packaged 10 Hz to 40 Hz: 0.015 g² Hz (flat)
40 Hz to 500 Hz: 0.015 g² Hz sloping down to 0.00015 g² Hz
60
3 Overview of BIOS Features
3.1 Introduction
The board uses an Intel BIOS that is stored in the Serial Peripheral Interface Flash
Memory (SPI Flash) and can be updated using a disk-based program. The SPI Flash
contains the BIOS Setup program, POST, the PCI auto-configuration utility, and Plug
and Play support.
The BIOS displays a message during POST identifying the type of BIOS and a revision
code. The initial production BIOSs are identified as TXG4110H.86A.
When the BIOS Setup configuration jumper is set to configure mode and the computer
is powered-up, the BIOS compares the CPU version and the microcode version in the
BIOS and reports if the two match.
The BIOS Setup program can be used to view and change the BIOS settings for the
computer. The BIOS Setup program is accessed by pressing the
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