-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.
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
iii
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.
Figure 1 shows the approximate location of the major components on Desktop Board
DG31GL.
Figure 1. Desktop Board DG31GL Components
11
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:
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.
⎯ 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.
13
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
82562G Fast Ethernet Controller for operation at 10/100 Mb/s
15
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.
17
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.
19
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.
21
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.
22
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