INTEL DG31GL Product Guide

Intel® Desktop Board DG31GL Product Guide

Order Number: E35043-001

Revision History

-001 First release of the Intel® Desktop Board DG31GL Product Guide March 2008
If an FCC declaration of conformity marking is present on the board, the following statement applies:
FCC Declaration of Conformity
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
For questions related to the EMC performance of this product, contact: Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124
1-800-628-8686 This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and the receiver.
Connect the equipment to an outlet on a circuit other than the one to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
Any changes or modifications to the equipment not expressly approved by Intel Corporation could void the user’s authority to operate the equipment.
Tested to comply with FCC standards for home or office use.
Canadian Department of Communications Compliance Statement
This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.
Le présent appareil numerique német pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de la classe B prescrites dans le Réglement sur le broullage radioélectrique édicté par le ministére des Communications du Canada.
Disclaimer
INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL® PRODUCTS. NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR 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. Intel products are not intended for use in medical, life saving, or life sustaining applications. Intel may make changes to specifications and product descriptions at any time, without notice.
Desktop Board DG31GL 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 and 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 by going to the World Wide Web site at: http://www.intel.com/ or by calling 1-800-548-4725.
Intel and the Intel logo are registered trademarks of Intel Corporation in the U.S. and other countries. * Other names and brands may be claimed as the property of others. Copyright © 2008, Intel Corporation. All rights reserved.
OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS

Preface

This Product Guide gives information about board layout, component installation, BIOS update, and regulatory requirements for Intel
®
Desktop Board DG31GL.

Intended Audience

The Product Guide is intended for technically qualified personnel. It is not intended for general audiences.

Use Only for Intended Applications

All Intel Desktop Boards are evaluated as Information Technology Equipment (I.T.E.) for use in personal computers (PC) for installation in homes, offices, schools, computer rooms, and similar locations. The suitability of this product for other PC or embedded non-PC applications or other environments, such as medical, industrial, alarm systems, test equipment, etc. may not be supported without further evaluation by Intel.

Document Organization

The chapters in this Product Guide are arranged as follows: 1 Desktop Board Features: a summary of product features 2 Installing and Replacing Desktop Board Components: instructions on how to install
the Desktop Board and other hardware components 3 Updating the BIOS: instructions on how to update the BIOS A Error Messages and Indicators: information about BIOS error messages and beep
codes B Regulatory Compliance: information about safety standards, EMC regulations, and
product certifications
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Intel Desktop Board DG31GL Product Guide

Conventions

The following conventions are used in this manual:
CAUTION
Cautions warn the user about how to prevent damage to hardware or loss of data.
NOTE
Notes call attention to important information.

Terminology

The table below gives descriptions of some common terms used in the product guide.
Term Description
GB Gigabyte (1,073,741,824 bytes) GHz Gigahertz (one billion hertz) KB Kilobyte (1024 bytes) MB Megabyte (1,048,576 bytes) Mbit Megabit (1,048,576 bits) MHz Megahertz (one million hertz)
iv

Contents

1 Desktop Board Features
Desktop Board Components.................................................................................11
Processor..........................................................................................................13
Main Memory.....................................................................................................13
®
Intel
G31 Express Chipset .................................................................................14
Audio Subsystem ...............................................................................................15
Legacy Input/Output (I/O) Controller....................................................................15
LAN Subsystem .................................................................................................15
Hi-Speed USB 2.0 Support ..................................................................................16
Enhanced IDE Interface ......................................................................................17
Serial ATA.........................................................................................................17
Expandability.....................................................................................................17
BIOS................................................................................................................17
Serial ATA and IDE Auto Configuration...........................................................17
PCI* and Auto Configuration ........................................................................17
Security Passwords.....................................................................................18
Hardware Monitoring and Fan Speed Control..........................................................18
Power Management............................................................................................18
ACPI.........................................................................................................19
Hardware Support ......................................................................................19
Power Connectors ...............................................................................19
Fan Headers .......................................................................................19
LAN Wake Capabilities..........................................................................19
Instantly Available PC Technology..........................................................20
+5 V Standby Power Indicator LED ........................................................20
Wake from USB ..................................................................................21
PME# Signal Wake-up Support..............................................................22
ENERGY STAR* Capable ..............................................................................22
Speaker............................................................................................................22
Battery.............................................................................................................22
Real-Time Clock.................................................................................................22
2 Installing and Replacing Desktop Board Components
Before You Begin ...............................................................................................23
Installation Precautions.......................................................................................24
Prevent Power Supply Overload ....................................................................24
Observe Safety and Regulatory Requirements.................................................24
Installing the I/O Shield ......................................................................................25
Installing and Removing the Desktop Board ...........................................................26
Installing and Removing a Processor.....................................................................27
Installing a Processor ..................................................................................27
Installing the Processor Fan Heat Sink ...........................................................30
Connecting the Processor Fan Heat Sink Cable................................................31
Removing the Processor ..............................................................................32
Installing and Removing Memory..........................................................................32
Installing DIMMs ........................................................................................33
Removing DIMMs........................................................................................35
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Intel Desktop Board DG31GL Product Guide
Connecting the Diskette Drive Cable .....................................................................35
Connecting the IDE Cable....................................................................................36
Connecting the Serial ATA (SATA) Cables ..............................................................38
Connecting to the Internal Headers and Connectors ................................................39
Connecting to the Front Panel Audio Header ...................................................40
Connecting to the S/PDIF Connector..............................................................40
Connecting to the Serial Port Header.............................................................40
Connecting to the Alternate Front Panel Power LED Header...............................41
Connecting to the Front Panel Header............................................................41
Connecting to the USB 2.0 Headers...............................................................42
Connecting to the Audio System...........................................................................42
Connecting Chassis Fan and Power Supply Cables...................................................43
Connecting the Chassis Fan Cable.................................................................43
Connecting Supply Power Cables ..................................................................44
Setting the BIOS Configuration Jumper .................................................................45
Clearing Passwords ............................................................................................46
Replacing the Battery .........................................................................................47
3 Updating the BIOS
Updating the BIOS with the Intel Updating the BIOS with the ISO Image BIOS Update File or the Iflash Memory
Update Utility...............................................................................................
Obtaining the BIOS Update File ....................................................................54
Updating the BIOS with the ISO Image BIOS Update File .................................54
Updating the BIOS with the Iflash Memory Update Utility .................................55
Recovering the BIOS...................................................................................56
®
Express BIOS Update Utility.................................53
54
A Error Messages and Indicators
BIOS Beep Codes...............................................................................................57
BIOS Error Messages..........................................................................................57
B Regulatory Compliance
Safety Standards ...............................................................................................59
Place Battery Marking.........................................................................................59
European Union Declaration of Conformity Statement..............................................60
Product Ecology Statements ................................................................................61
Recycling Considerations .............................................................................61
Lead-free 2LI/Pb-free 2LI Board ...................................................................64
Restriction of Hazardous Substances (RoHS) ..................................................65
EU RoHS ............................................................................................65
China RoHS ........................................................................................66
EMC Regulations ................................................................................................68
Product Certifications..........................................................................................70
Board-Level Certification Markings ................................................................70
Chassis and Component Certifications............................................................71
Figures
1. Desktop Board DG31GL Components...............................................................11
2. LAN Status LEDs ..........................................................................................16
3. Location of the Standby Power Indicator ..........................................................21
4. Installing the I/O Shield ................................................................................25
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Contents
5. Desktop Board DG31GL Mounting Screw Hole Locations .....................................26
6. Lift the Socket Lever.....................................................................................27
7. Lift the Load Plate.........................................................................................28
8. Remove the Protective Socket Cover ...............................................................28
9. Remove the Processor from the Protective Processor Cover ................................29
10. Install the Processor .....................................................................................29
11. Close the Load Plate .....................................................................................30
12. Connecting the Processor Fan Heat Sink Cable to the Processor Fan Header..........31
13. Dual Channel Memory Configuration Example ...................................................32
14. Use DDR2 DIMMs .........................................................................................33
15. Installing a DIMM .........................................................................................34
16. Connecting the Diskette Drive Cable................................................................36
17. Connecting the IDE Cable ..............................................................................37
18. Connecting the Serial ATA Cable.....................................................................38
19. Internal Headers and Connectors....................................................................39
20. Back Panel Audio Connectors .........................................................................42
21. Location of the Chassis Fan Header .................................................................43
22. Connecting Power Supply Cables ....................................................................44
23. Location of the BIOS Configuration Jumper Block ..............................................45
24. Removing the Battery ...................................................................................51
25. Desktop Board DG31GL China RoHS Material Self Declaration Table.....................67
Tables
1. Feature Summary.......................................................................................... 9
2. Desktop Board DG31GL Components...............................................................12
3. LAN Connector LEDs .....................................................................................16
4. Front Panel Intel High Definition Audio Header Signal Names ..............................40
5. S/PDIF Connector Signal Names .....................................................................40
6. Serial Port Header Signal Names.....................................................................40
7. Alternate Front Panel Power LED Header Signal Names ......................................41
8. Front Panel Header Signal Names ...................................................................41
9. USB 2.0 Header Signal Names........................................................................42
10. Jumper Settings for the BIOS Setup Program Modes..........................................45
11. Beep Codes .................................................................................................57
12. BIOS Error Messages ....................................................................................57
13. Safety Standards..........................................................................................59
14. Lead-Free Second Level Interconnect Marks .....................................................65
15. China RoHS Environmentally Friendly Use Period Mark.......................................66
16. EMC Regulations...........................................................................................68
17. Product Certification Markings ........................................................................70
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Intel Desktop Board DG31GL Product Guide
viii

1 Desktop Board Features

This chapter briefly describes the features of Intel® Desktop Board DG31GL. Table 1 summarizes the major features of the Desktop Board.
Table 1. Feature Summary
Form Factor
Processor Support for an Intel® processor in the LGA775 package Main Memory
Chipset Intel® G31 Express Chipset consisting of:
Graphics
Audio
LAN Support 10/100 Mbs Ethernet LAN
Expansion Capabilities
Peripheral Interfaces
microATX (218.44 millimeters [8.60 inches] x 243.84 millimeters [9.60 inches])
Two 240-pin, DDR2 1.8 V (only) SDRAM Dual Inline Memory Module
(DIMM) sockets
800/667 MHz single or dual channel DDR2 SDRAM interface
Support for up to 4 GB of system memory
Intel G31 Express Chipset Graphics and Memory Controller Hub
(GMCH) with Intel® Graphics Media Accelerator 3100 (Intel® GMA
3100)
Intel
Intel G31 Express Chipset Graphics and Memory Controller Hub
4-channel (two independent 2-channel audio streams) onboard
Two PCI* bus connectors
Up to eight USB 2.0 ports
Two Serial ATA (SATA) channels (3.0 Gb/s)
One IDE interface with ATA-66/100 support (two devices)
One diskette drive interface
One serial port header
PS/2* keyboard and mouse ports
®
82801G I/O Controller Hub (ICH7)
(GMCH) Intel
audio subsystem, featuring:
IntelSupport for AC’97 audio RealTek*ALC268-GR audio codec Onboard S/PDIF connector
Four ports routed to the back panel Four ports routed to two onboard USB headers
®
GMA 3100
®
High Definition Audio
continued
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Intel Desktop Board DG31GL Product Guide
Table 1. Feature Summary (continued)
BIOS
Intel
4-Mbit symmetrical flash memory device
Support for SMBIOS
Intel
Intel
Power Management
Support for Advanced Configuration and Power Interface (ACPI)
Suspend to RAM (STR)
Wake on USB, PCI, LAN, and front panel
ENERGY STAR* capable
Hardware Monitor
Voltage sense to detect out of range power supply voltages
Thermal sense to detect out of range temperatures
Two fan headers
Two fan sense inputs to monitor fan speed
Supported Operating Systems
Microsoft Windows Vista* Ultimate 32-bit edition
Microsoft Windows Vista Ultimate 64-bit edition
Microsoft Windows* XP Media Center Edition 2005
Microsoft Windows XP Professional
Microsoft Windows XP Professional x64 Edition
Microsoft Windows XP Home
®
Platform Innovation Framework for extensible firmware
interface
®
Rapid BIOS Boot
®
Express BIOS Update
For more information about Desktop Board DG31GL, including the Technical Product Specification (TPS), BIOS updates, and device drivers, go to
http://support.intel.com/support/motherboards/desktop/.
10
Desktop Board Features

Desktop Board Components

Figure 1 shows the approximate location of the major components on Desktop Board DG31GL.
Figure 1. Desktop Board DG31GL Components
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Intel Desktop Board DG31GL Product Guide
Table 2. Desktop Board DG31GL Components
Label Description
A PCI bus connector 2 B PCI bus connector 1 C Battery D S/PDIF connector E Back panel connectors F 12 V processor core voltage connector (2 x 2 pin) G Chassis fan header (3-pin) H Processor socket I Processor fan header (4-pin) J DDR2 Channel A DIMM 0 socket K DDR2 Channel B DIMM 0 socket L Serial port header M Diskette drive connector N Main power connector (2 x 12 pin) O IDE connector P Serial ATA connectors (2) Q Front panel header R Alternate front panel power LED header S BIOS configuration jumper block T High-speed USB 2.0 headers (2) U Speaker V Front panel audio header
For more information go to the following locations:
Supported processors
Audio software and utilities
LAN software and drivers
http://www.intel.com/go/findCPU http://www.intel.com/design/motherbd http://www.intel.com/design/motherbd
12
Desktop Board Features

Processor

CAUTION
Failure to use an appropriate power supply and/or not connecting the 12 V (2 x 2 pin) power connector to the Desktop Board may result in damage to the board, or the system may not function properly.
Desktop Board DG31GL supports an Intel processor in the LGA775 package. Processors are not included with the Desktop Board and must be purchased separately. The processor connects to the Desktop Board through the LGA775 socket.
Go to the following locations for more information:
Instructions on installing or upgrading the processor, page
Supported processors for Desktop Board DG31GL,
http://www.intel.com/go/findCPU
27 in Chapter 2

Main Memory

NOTE
To be fully compliant with all applicable Intel ® SDRAM memory specifications, the board should be populated with DIMMs that support the Serial Presence Detect (SPD) data structure. If your memory modules do not support SPD, you will see a notification to this effect on the screen at power up. The BIOS will attempt to configure the memory controller for normal operation.
The Desktop Board supports the dual or single channel memory configurations defined below.
Two 240-pin Double Data Rate 2 (DDR2) SDRAM Dual Inline Memory Module
(DIMM) connectors with gold-plated contacts.
Support for:
Unbuffered, non-registered single or double-sided DIMMs Non-ECC DDR2 memory 1.8 V DIMMs only
DIMM Type and Timings listed below:
Type Timing
DDR2-800 5-5-5 or 6-6-6 only DDR2-667 5-5-5 only
Serial Presence Detect (SPD) memory only
Memory configurations listed below:
Up to 2.0 GB utilizing 256 Mb technology Up to 4.0 GB utilizing 512 Mb or 1 Gb technology
For a list of tested memory, go to http://www.cmtlabs.com/mbsearch.asp.
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Intel Desktop Board DG31GL Product Guide

Intel® G31 Express Chipset

The Intel G31 Express Chipset consists of the following devices:
Intel G31 Express Chipset Graphics and Memory Controller Hub (GMCH) with Direct
Media Interface (DMI)
Intel 82801G I/O Controller Hub (ICH7) with DMI The GMCH provides interfaces to the processor, memory, and the DMI interconnect.
This device 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 GMCH contains the Intel integrated graphics controller which has the following features:
400 MHz core frequency
Up to 2048 x 1536 display resolution at 75 Hz refresh (QXGA)
High quality texture engine:
DX9.0c* and OpenGL* 1.4 compliant Hardware Pixel Shader 2.0 Vertex Shader Model 2.0
3D Graphics Rendering enhancements:
1.6 dual texture GigaPixel/s maximum fill rate 16-bit and 32-bit color Vertex cache
Video
Software DVD at 30 fps full screen Adaptive deinterlacing Dynamic Video Memory Technology (DVMT) support up to 256 MB
NOTE
A minimum of 512 MB of system memory is required in order for the Intel GMA 3100 integrated graphics controller to operate properly.
®
Graphics Media Accelerator 3100 (Intel® GMA 3100)
For more information about the Intel G31 Express Chipset, go to
http://developer.intel.com/design/nav/pcserver.htm.
14
Desktop Board Features

Audio Subsystem

The onboard audio subsystem consists of the following:
®
Intel
RealTek ALC268-GR audio codec
Back panel audio connectors
Onboard audio header/connector:
The audio subsystem supports the following features:
A signal-to-noise (S/N) ratio of 90 dB for recording and 95 dB for playback
4-channel audio (two independent 2-channel audio streams) using the back panel
Front panel support for both Intel High Definition Audio and AC’97 audio
For more information about audio drivers and utilities go to
http://support.intel.com/support/motherboards/desktop/.
ICH7
Intel High Definition audio front panel audio header Onboard S/PDIF connector
audio connectors and the Intel High Definition front panel audio header for use with front panel audio solutions

Legacy Input/Output (I/O) Controller

The legacy I/O controller features the following:
Low pin count (LPC) interface
One serial port interface via an onboard header
Serial IRQ interface compatible with serialized IRQ support for PCI systems
Intelligent power management, including a programmable wake up event interface
PCI power management support

LAN Subsystem

The LAN subsystem includes:
Intel ICH7
Intel
RJ-45 LAN connector with integrated status LEDs
The subsystem features:
CSMA/CD protocol engine
LAN connect interface between ICH7 and the LAN controller
PCI bus power management
For information about LAN software and drivers, go to
http://support.intel.com/support/motherboards/desktop.
®
82562G Fast Ethernet Controller for operation at 10/100 Mb/s
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Intel Desktop Board DG31GL Product Guide
Two LEDs are built into the RJ-45 LAN connector located on the back panel (see Figure 2). These LEDs indicate the status of the LAN.
Figure 2. LAN Status LEDs
Table 3 describes the LED states when the board is powered up and the LAN subsystem is operating.
Table 3. LAN Connector LEDs
LED LED State Indicates
A (Green) Off LAN link is not established On (steady state) LAN link is established Blinking LAN activity is occurring
Off 10 Mb/s data rate B (Yellow) On (steady state) 100 Mb/s data rate

Hi-Speed USB 2.0 Support

The Desktop Board supports up to eight USB 2.0 ports (four ports routed to the back panel and four ports routed to two internal headers) via the ICH7. USB 2.0 ports are backward compatible with USB 1.1 devices. USB 1.1 devices will function normally at USB 1.1 speeds.
USB 2.0 support requires both an operating system and drivers that fully support USB 2.0 transfer rates. Disabling Hi-Speed USB in the BIOS reverts all USB 2.0 ports to USB 1.1 operation. This may be required to accommodate operating systems that do not support USB 2.0.
16
Desktop Board Features

Enhanced IDE Interface

The board’s IDE interface handles the exchange of information between the processor and peripheral devices such as hard disk drives and CD-ROM drives. The interface supports:
Up to two IDE devices (such as hard drives)
ATAPI-style devices (such as CD-ROM drives)
Older PIO Mode devices
Ultra DMA-33 and ATA-66/100 protocols

Serial ATA

The Desktop Board supports two Serial ATA channels (3.0 Gb/s) via ICH7, connecting one device per channel.

Expandability

For system expansion, the Desktop Board provides two PCI bus connectors.

BIOS

The BIOS provides the Power-On Self-Test (POST), the BIOS Setup program, the PCI and IDE auto-configuration utilities, and the video BIOS. The BIOS is stored in the Serial Peripheral Interface (SPI) Flash component.
The BIOS can be updated by following the instructions on page

Serial ATA and IDE Auto Configuration

If you install a Serial ATA or IDE device (such as a hard drive) in your computer, the auto-configuration utility in the BIOS automatically detects and configures the device for your computer. You do not need to run the BIOS Setup program after installing a Serial ATA or IDE device. You can override the auto-configuration options by specifying manual configuration in the BIOS Setup program.

PCI* and Auto Configuration

If you install a PCI add-in card in your computer, the PCI auto-configuration utility in the BIOS automatically detects and configures the resources (IRQs, DMA channels, and I/O space) for that add-in card. You do not need to run the BIOS Setup program after you install a PCI add-in card.
53 in Chapter 3.
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Intel Desktop Board DG31GL Product Guide

Security Passwords

The BIOS includes security features that restrict whether the BIOS Setup program can be accessed and who can boot the computer. A supervisor password and a user password can be set for the BIOS Setup and for booting the computer, with the following restrictions:
The supervisor password gives unrestricted access to view and change all Setup
options. If only the supervisor password is set, pressing <Enter> at the password prompt of Setup gives the user restricted access to Setup.
If both the supervisor and user passwords are set, you must enter either the
supervisor password or the user password to access Setup. Setup options are then available for viewing and changing depending on whether the supervisor or user password was entered.
Setting a user password restricts who can boot the computer. The password
prompt is displayed before the computer is booted. If only the supervisor password is set, the computer boots without asking for a password. If both passwords are set, you can enter either password to boot the computer.
Related Links:
For instructions on resetting the password, see
Clearing Passwords on page 46.

Hardware Monitoring and Fan Speed Control

The features of the hardware monitoring and fan speed control include:
Monitoring of power supply voltages to detect levels above and below acceptable
values
Fan speed controllers and sensors integrated into the legacy I/O controller
Thermal sensors in the processor, GMCH, and ICH7, plus an onboard remote
sensor
Thermally monitored closed-loop fan control, for all onboard fans, that can adjust
fan speed or switch the fans off as needed

Power Management

Power management is implemented at several levels, including:
Software support through the Advanced Configuration and Power Interface (ACPI)
Hardware support:
Power connectors Fan headers LAN wake capabilities Instantly Available PC technology (Suspend to RAM) +5 V standby power indicator LED Wake from USB Power Management Event signal (PME#) wakeup support
ENERGY STAR capable
18
Desktop Board Features

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 Desktop Board requires an operating system that provides full ACPI support.

Hardware Support

Power Connectors
ATX12V-compliant power supplies can turn off the computer power through system control. When an ACPI-enabled computer 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 (either on or off). The computer’s response can be set by using the Last Power State feature in the BIOS Setup program’s Boot menu.
The Desktop Board has two power connectors. See location of the power connectors.
Figure 22 on page 44 for the
Fan Headers
The function/operation of the fans is as follows:
The fans are on when the computer is in the ACPI S0 state.
The fans are off when the computer is in the ACPI S3, S4, or S5 state.
Each fan header is wired to a tachometer input of the hardware monitoring and
control device.
All fan headers support closed-loop fan control that can adjust the fan speed or
switch the fan on or off as needed.
All fan headers have a +12 V DC connection. The Desktop Board has a 4-pin processor fan header and a 3-pin chassis fan header.
LAN Wake Capabilities
CAUTION
For LAN wake capabilities, the 5 V standby line for the power supply must be capable of delivering adequate +5 V standby current. Failure to provide adequate standby current when using this feature can damage the power supply.
LAN wakeup capabilities enable remote wake-up of the computer through a network. The LAN subsystem monitors network traffic and upon detecting a Magic Packet* frame, it asserts a wake-up signal that powers up the computer.
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Intel Desktop Board DG31GL Product Guide
Instantly Available PC Technology
CAUTIONS
For Instantly Available PC technology, the 5 V standby line for the power supply must be capable of delivering adequate +5 V standby current. Failure to provide adequate standby current when using this feature can damage the power supply and/or effect ACPI S3 sleep state functionality.
Power supplies used with this Desktop Board must be able to provide enough standby current to support the standard Instantly Available (ACPI S3 sleep state) configuration. If the standby current necessary to support multiple wake events from the PCI and/or USB buses exceeds power supply capacity, the Desktop Board may lose register settings stored in memory.
Instantly Available PC technology enables the board to enter the ACPI S3 (Suspend-to­RAM) sleep state. While in the S3 sleep state, the computer will appear to be off. If the computer has a dual-colored power LED on the front panel, the sleep state is indicated by the LED turning amber. When signaled by a wake-up device or event, the computer quickly returns to its last known awake state.
The Desktop Board supports the PCI Bus Power Management Interface Specification. Add-in cards that support this specification can participate in power management and can be used to wake the computer.
+5 V Standby Power Indicator LED
CAUTION
If the 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 board. Failure to do so could damage the board and any attached devices.
The Desktop Board’s standby power indicator, shown in Figure 3, is lit when there is standby power still present on the board even when the computer appears to be off. For example, when this LED is lit, standby power is still present at the memory module sockets and the PCI bus connectors.
20
Desktop Board Features
Figure 3. Location of the Standby Power Indicator
For information on standby current requirements for the Desktop Board, refer to the Technical Product Specification by going to
http://support.intel.com/support/motherboards/desktop/, finding the product, and
clicking on the Technical Documents tab.
Wake from USB
NOTE
Wake from USB requires the use of a USB peripheral that supports Wake from USB.
USB bus activity wakes the computer from an ACPI S3 state.
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Intel Desktop Board DG31GL Product Guide
PME# Signal Wake-up Support
When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI S3, S4, or S5 state.

ENERGY STAR* Capable

In 2007, the US Department of Energy and the US Environmental Protection Agency revised the ENERGY STAR requirements. Intel worked directly with these two governmental agencies to define the new requirements. Currently Intel Desktop Boards are capable of meeting the new ENERGY STAR requirements depending upon system configuration.
Go to the following link for information and recommendations concerning the new ENERGY STAR requirements:
http://www.intel.com/go/EnergyStar

Speaker

A speaker is mounted on the Desktop Board. The speaker provides audible error code (beep code) information during the Power-On Self-Test (POST).

Battery

A battery on the Desktop Board keeps the values in CMOS RAM and the clock current when the computer is turned off. Go to page battery.
47 for instructions on how to replace the

Real-Time Clock

The Desktop Board has a time-of-day clock and 100-year calendar. The battery on the Desktop Board keeps the clock current when the computer is turned off.
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