Intel D845GVAD2 - P4 Socket 478 ATX Motherboard User manual

Intel®Desktop Board
D845GVAD2
Product Guide
Order Number: C14171-001

Revision History
Revision Revision History Date
-001 First release of the Intel®Desktop Board D845GVAD2 Product Guide. August
2002
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.
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 édictépar 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
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. 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 D845GVAD2 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, Celeron and Pentium are registered trademarks of Intel Corporation or its subsidiaries in the United States and other
countries.
†Other names and brands may be claimed as the property of others.
Copyright © 2002, Intel Corporation. All rights reserved.

iii
Contents
1Desktop Board Features
Desktop Board Components ................................................................................................ 9
Processor............................................................................................................................10
Main Memory ......................................................................................................................11
Intel®845GV Chipset ..........................................................................................................11
Intel®82845GV Graphics and Memory Controller Hub (GMCH).................................12
Intel®82801DB I/O Controller Hub (ICH4)..................................................................12
Firmware Hub (FWH) .................................................................................................12
Input/Output (I/O) Controller................................................................................................12
Integrated Graphics.............................................................................................................13
LAN Subsystem (Optional)..................................................................................................13
LAN Subsystem Software...........................................................................................13
RJ-45 LAN Connector LEDs.......................................................................................14
Hi-Speed USB 2.0 Support..................................................................................................14
Enhanced IDE Interface ......................................................................................................14
Expansion Slots...................................................................................................................15
BIOS ...................................................................................................................................15
PCI Auto Configuration...............................................................................................15
IDE Auto Configuration...............................................................................................15
Security Passwords ....................................................................................................15
Power Management Features .............................................................................................16
ACPI...........................................................................................................................16
Suspend to RAM (Instantly Available PC Technology) ...............................................16
Hardware Management.......................................................................................................17
Power Connectors ......................................................................................................17
Fan Connectors..........................................................................................................17
Resume on Ring.........................................................................................................17
Wake from USB..........................................................................................................17
Wake from PS/2 Keyboard/Mouse..............................................................................18
PME# Wakeup Support ..............................................................................................18
Speaker...............................................................................................................................18
Battery.................................................................................................................................18
Real-Time Clock..................................................................................................................18
2Installing and Replacing Desktop Board Components
Before You Begin ................................................................................................................19
Installing the I/O Shield .......................................................................................................20
Installing and Removing the Desktop Board........................................................................21
Installing and Removing a Processor ..................................................................................22
Installing a Processor .................................................................................................22
Installing the Processor Fan Heat Sink.......................................................................22
Connecting the Processor Fan Heat Sink Cable.........................................................23
Removing a Processor ...............................................................................................23

Intel Desktop Board D845GVAD2 Product Guide
iv
Installing and Removing Memory ........................................................................................24
Installing DIMMs.........................................................................................................24
Removing DIMMs.......................................................................................................25
Connecting the IDE Cable ...................................................................................................25
Connecting the Front Panel Header ....................................................................................27
Installing a Front Panel Audio Solution (Optional) ...............................................................27
Installing a Front Panel USB Solution..................................................................................27
Setting the BIOS Configuration Jumper Block .....................................................................28
Clearing Passwords ............................................................................................................29
Replacing the Battery ..........................................................................................................29
3Updating the BIOS
Updating the BIOS with the Intel®Express BIOS Update Utility ..........................................33
Updating the BIOS with the Intel®Flash Memory Update Utility ..........................................33
Obtaining the BIOS Update File..................................................................................33
Updating the BIOS......................................................................................................34
Recovering the BIOS..................................................................................................34
4Using the BIOS Setup Program
Maintenance Menu..............................................................................................................38
Main Menu ..........................................................................................................................39
Advanced Menu ..................................................................................................................40
PCI Configuration Submenu .......................................................................................41
Boot Configuration Submenu......................................................................................42
Peripheral Configuration Submenu.............................................................................43
IDE Configuration Submenu .......................................................................................45
Primary/Secondary IDE Master/Slave Submenus.......................................................46
Diskette Configuration Submenu ................................................................................48
Event Log Configuration Submenu .............................................................................49
Video Configuration Submenu....................................................................................50
USB Configuration Submenu......................................................................................51
Chipset Configuration Submenu .................................................................................52
Security Menu .....................................................................................................................53
Power Menu ........................................................................................................................54
ACPI Submenu...........................................................................................................54
Boot Menu...........................................................................................................................55
Boot Device Priority Submenu....................................................................................56
Hard Disk Drives Submenu ........................................................................................56
Removable Devices Submenu....................................................................................57
ATAPI CD-ROM Drives ..............................................................................................57
Exit Menu ............................................................................................................................58
5Technical Reference
Board Connectors ...............................................................................................................59
Back Panel Connectors ..............................................................................................60
Midboard Connectors .................................................................................................61
Audio Connectors ..............................................................................................61

Contents
v
Power and Hardware Connectors ......................................................................62
Add-In Card and Peripheral Interface Connectors..............................................63
Front Panel Headers ..................................................................................................64
Desktop Board Resources...................................................................................................66
Memory Map ..............................................................................................................66
DMA Channels ...........................................................................................................66
Interrupts ....................................................................................................................67
AError Messages and Indicators
BIOS Beep Codes...............................................................................................................69
BIOS Error Messages .........................................................................................................70
BRegulatory Compliance
Safety Regulations ..............................................................................................................73
EMC Regulations ................................................................................................................73
Product Certification Markings.............................................................................................74
Installation Instructions........................................................................................................75
Ensure Electromagnetic Compatibility (EMC) Compliance .........................................75
Chassis and Component Certifications.......................................................................76
Prevent Power Supply Overload.................................................................................76
Place Battery Marking ................................................................................................76
Use Only for Intended Applications.............................................................................76
Figures
1. Desktop Board Components.......................................................................................... 9
2. Location of the Standby Power Indicator.......................................................................16
3. Installing the I/O Shield.................................................................................................20
4. Desktop Board Mounting Holes ....................................................................................21
5. Installing a Processor....................................................................................................22
6. Connecting the Processor Fan Heat Sink Cable to the Processor Fan Connector........23
7. Installing a Memory Module ..........................................................................................24
8. Connecting the IDE Cable.............................................................................................26
9. Location of the BIOS Configuration Jumper Block ........................................................28
10. Removing the Battery from the Desktop Board.............................................................31
11. Back Panel Connectors ................................................................................................60
12. Audio Connectors .........................................................................................................61
13. Power and Hardware Control Connectors.....................................................................62
14. Add-in Card and Peripheral Interface Connectors.........................................................63
15. Front Panel Headers.....................................................................................................64

Intel Desktop Board D845GVAD2 Product Guide
vi
Tables
1. Feature Summary .......................................................................................................... 7
2. Processors Supported by the Desktop Board ...............................................................10
3. RJ-45 LAN Connector LEDs .........................................................................................14
4. Jumper Settings for the BIOS Setup Program Modes (J9H2) .......................................28
5. BIOS Setup Program Menu Bar....................................................................................37
6. BIOS Setup Program Function Keys.............................................................................38
7. Maintenance Menu .......................................................................................................38
8. Main Menu....................................................................................................................39
9. Advanced Menu............................................................................................................40
10. PCI Configuration Submenu .........................................................................................41
11. Boot Configuration Submenu ........................................................................................42
12. Peripheral Configuration Submenu ...............................................................................43
13. IDE Configuration Submenu .........................................................................................45
14. Primary/Secondary IDE Master/Slave Submenus.........................................................46
15. Diskette Configuration Submenu ..................................................................................48
16. Event Log Configuration Submenu ...............................................................................49
17. Video Configuration Submenu ......................................................................................50
18. USB Configuration Submenu ........................................................................................51
19. Chipset Configuration Submenu ...................................................................................52
20. Security Menu...............................................................................................................53
21. Power Menu..................................................................................................................54
22. ACPI Submenu .............................................................................................................54
23. Boot Menu ....................................................................................................................55
24. Boot Device Priority Submenu ......................................................................................56
25. Hard Disk Drives Submenu...........................................................................................56
26. Removable Devices Submenu......................................................................................57
27. ATAPI CD-ROM Drives Submenu.................................................................................57
28. Exit Menu......................................................................................................................58
29. Front Panel Audio Header Signal Names (J8A1) ..........................................................61
30. Front Panel USB 2.0 Header (J9F2) .............................................................................65
31. Front Panel Header (J9G1)...........................................................................................65
32. System Memory Map....................................................................................................66
33. DMA Channels..............................................................................................................66
34. Interrupts ......................................................................................................................67
35. Beep Codes..................................................................................................................69
36. BIOS Error Messages...................................................................................................70
37. Safety Regulations........................................................................................................73
38. EMC Regulations..........................................................................................................73

7
1 Desktop Board Features
Table 1 describes the major features of Intel®Desktop Board D845GVAD2.
Table 1. Feature Summary
Form Factor • microATX at 9.2 inches by 8.2 inches
Processor Support for:
• 533 MHz or 400 MHz front side bus (FSB) Intel®Pentium®4 processor in an
mPGA_478 socket
• 400 MHz FSB Intel®Celeron®processor in an mPGA-478 socket
Memory • Up to two 184-pin, 2.5 V, Dual Inline Memory Module (DIMM) sockets
• DDR266/200 Double Data Rate (DDR) SDRAM interface
• Designed to support up to 2 GB of system memory
NOTE: Desktop Board D845GVAD2 has been designed to support DIMMs based on 512 Mbit
technology up to 2 GB, but this technology has not been validated on this Intel®desktop board.
For more information about the latest list of tested memory, refer to the Intel World Wide Web
site at:
http://support.intel.com/support/motherboards/desktop/
Chipset Intel®845GV chipset, consisting of:
• Intel®82845GV Graphics and Memory Controller Hub (GMCH) with Accelerated Hub
Architecture (AHA) bus
• Intel®82801DB I/O Controller Hub (ICH4) with AHA bus with support up to four
Hi-Speed Universal Serial Bus 2.0 (USB 2.0) ports
• 4 Mbit Firmware Hub (FWH)
I/O Control • SMSC LPC47M102S-MC low pin count (LPC) interface I/O controller
LAN (optional) • Intel®82562ET 10/100 Mbit/sec Platform LAN Connect (PLC) device and
RJ-45 connector
Graphics • Intel 845GV chipset
• Integrated Intel®Extreme Graphics
Audio • Intel 845GV chipset (AC ’97)
• Sigmatel audio codec
Expansion
Capabilities
Four PCI slots
continued

Intel Desktop Board D845GVAD2 Product Guide
8
Table 1. Feature Summary (continued)
Peripheral
Interfaces
• Up to four USB 2.0 ports
—Two ports routed to the back panel
—Two ports routed to the USB front panel header
• Two IDE interfaces with Ultra DMA-33 and ATA-66/100 support
• One diskette drive interface
• One parallel port
• Two serial ports (one via a board header)
• PS/2†keyboard and mouse ports
BIOS • Intel/AMI BIOS
• Intel®Rapid BIOS Boot
• Intel®Express BIOS Update
• SMBIOS support
Power
Management
• Support for Advanced Configuration and Power Interface (ACPI)
• Support for Suspend to RAM (Instantly Available PC)
• Wake on USB, PCI, RS-232, LAN, and front panel
✏ NOTE
For information about Intel desktop boards, including the Technical Product Specification (TPS),
BIOS updates, and device drivers, go to the Intel World Wide Web site at:
http://support.intel.com/support/motherboards/desktop/

Desktop Board Features
9
Desktop Board Components
Figure 1 shows the location of the major components on Desktop Board D845GVAD2.
OM14568
E
CD
F
I
J
K
L
M
NOP
H
QR
T
V
U
W
BA
G
S
X
Y
Z
A Audio codec N Diskette drive connector
B Front panel audio header (optional) O Secondary IDE connector
C Auxiliary line-in connector (ATAPI) P Primary IDE connector
D CD-ROM connector (ATAPI) Q Speaker
E Back panel connectors R Battery
F 12 V processor core voltage connector S Alternate power/sleep LED connector
G Rear chassis fan connector T Front chassis fan connector
H Intel 82845GV (GMCH) U Chassis intrusion connector
I Processor socket V BIOS configuration jumper
J Processor fan connector W Front panel header
K DIMM sockets X Intel 82801DB (ICH4)
L Serial port B connector (optional) Y Front panel USB 2.0 header
M Main power connector Z PCI bus add-in card connectors
Figure 1. Desktop Board Components

Intel Desktop Board D845GVAD2 Product Guide
10
Processor
CAUTION
Failure to use an ATX12V or SFX-12V power supply, or not connecting the additional power
supply lead to Desktop Board D845GVAD2 may result in damage to the desktop board and/or
power supply.
Desktop Board D845GVAD2 supports a single Intel Pentium 4 processor or Intel Celeron
processor. Processors are not included with the desktop board and must be purchased separately.
The processor connects to the desktop board through the mPGA-478-pin socket. The Intel
Pentium 4 processor or Intel Celeron processor may be removed and replaced to accommodate
supported higher speed processors.
Desktop Board D845GVAD2 supports the processors listed in Table 2.
Table 2. Processors Supported by the Desktop Board
Type Designation FSB Frequency L2 Cache
2.8, 2.66, 2.53, 2.4B, and 2.26 GHz 533 MHz 512 KBIntel®Pentium®4 processor
on .13 micron process in an
mPGA478 package 2.6, 2.5, 2.40, 2.20, 2A, 1.80A, and
1.60A GHz
400 MHz 512 KB
Intel Pentium 4 processor
on .18 micron process in an
mPGA478 package
2, 1.90, 1.80, 1.70, 1.60, 1.50, and
1.4 GHz
400 MHz 256 KB
Intel®Celeron®processor in
an mPGA478 package
1.8 and 1.7 GHz 400 MHz 128 KB
For the latest information on processor support for Desktop Board D845GVAD2, refer to the Intel
World Wide Web site at:
http://support.intel.com/support/motherboards/desktop/
For instructions on installing or upgrading the processor, see Chapter 2 on page 19.
Desktop Board D845GVAD2 requires an ATX12V or SFX-12V compliant power supply to
function according to Intel desktop board specifications. The desktop board has two 12 V
compliant power supply connectors that are needed to provide extra power to the Intel 845GV
chipset and Intel Pentium 4 processor.
Items A and E in Figure 13 on page 62 show the two power connector locations.

Desktop Board Features
11
Main Memory
✏
NOTE
To be fully compliant with all applicable Intel®SDRAM memory specifications, the Intel desktop
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.
✏
NOTE
All memory components and DIMMs used with the desktop board must comply with the PC
SDRAM specifications. These include the PC SDRAM Specification (memory component specific),
the PC Unbuffered DIMM Specification. To view or download these specifications, refer to this
Intel World Wide Web site:
http://www.intel.com/technology/memory/pcsdram/spec/
Desktop Board D845GVAD2 supports system memory as defined below:
• Two 184-pin DIMMs
• 2.5 V, 266 MHz or 200 MHz DDR SDRAM interface
• Memory configurations up to 2 GB using 512 Mbit technology
• Serial Presence Detect (SPD)
• Suspend to RAM (STR)
• Non-ECC RAM (registered memory is not supported)
• Unbuffered and non registered single or double-sided DIMMs
✏ NOTE
Desktop Board D845GVAD2 has been designed to support DIMMs based on 512 Mbit technology
up to 2 GB, but this technology has not been validated on this board. For more information about
the latest list of tested memory, refer to the Intel World Wide Web site at:
http://support.intel.com/support/motherboards/desktop/
Intel®845GV Chipset
The Intel 845GV chipset consists of the following:
• Intel 82845GV Graphics and Memory Controller Hub (GMCH) with AHA bus
• Intel 82801DB I/O Controller Hub (ICH4) with AHA bus
• Firmware Hub (FWH)

Intel Desktop Board D845GVAD2 Product Guide
12
Intel®82845GV Graphics and Memory Controller Hub (GMCH)
The GMCH provides the processor, system memory, and hub interfaces in the Intel 845GV chipset
platform. Features on Desktop Board D845GVAD2 include:
• Single processor support with 533 MHz/400 MHz data transfer rate
• Support for up to 2 GB DDR SDRAM at 266/200 MHz operation
✏ NOTE
512 Mbit technology has not been validated on this desktop board.
Intel®82801DB I/O Controller Hub (ICH4)
The ICH4 integrates many I/O functions and provides the I/O subsystem with access to the rest of
the platform. ICH4 features on Desktop Board D845GVAD2 include:
• Integrated IDE controller supports two Ultra DMA-33 and ATA-66/100 channels and
PIO modes
• SMBus interface
• FWH interface
• Low pin count (LPC) interface
• AC ’97 2.1 compliant link for audio and telephony codecs
• Integrated Intel 82562ET 10/100 Mbit/sec Platform LAN Connect (PLC) device for interfacing
the ICH4 LAN connect interface to LAN connect component
• Three UHCI and one ECHI compliant host controllers supporting up to four USB ports
Firmware Hub (FWH)
The 4 Mbit Firmware Hub has these features:
• System BIOS
• System security and management logic
Input/Output (I/O) Controller
The SMSC LPC47M102S-MC ultra I/O controller features the following:
• Low pin count (LPC) interface
• 3.3 V operation
• Two serial ports (one via a board header)
• One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port
(EPP) support
• Serial IRQ interface compatible with serialized IRQ support for PCI systems
• PS/2-style mouse and keyboard interfaces
• Interface for one 1.2 MB, 1.44 MB, or 2.88 MB diskette drive
• Intelligent power management, including a programmable wake up event interface
• PCI power management support

Desktop Board Features
13
Integrated Graphics
The integrated graphics on Desktop Board D845GVAD2 feature:
• Intel 845GV chipset
• Intel Extreme Graphics
Audio Subsystem
The audio subsystem features the following:
• Intel 845GV chipset (AC ’97)
• Sigmatel†STAC9750 audio codec
✏ NOTE
The line out connector, located on the back panel, is designed to power either headphones or
amplified speakers only. Poor audio quality may occur if passive (non-amplified) speakers are
connected to this output.
Audio drivers and utilities are available from Intel’s World Wide Web site:
http://support.intel.com/support/motherboards/desktop/
LAN Subsystem (Optional)
The optional Intel 82562ET (with the Intel 82801DB ICH4) provides a Fast PCI LAN subsystem
providing both 10Base-T and 100Base-TX connectivity. The Intel 82562ET provides the
following functions:
• Basic 10/100 Ethernet LAN connectivity
• Supports RJ-45 connector with status indicator LEDs
• Programmable transit threshold
• Configurable EEPROM that contains the MAC address
LAN Subsystem Software
For LAN software and drivers, refer to the D845GVAD2 link on Intel’s World Wide Web site at:
http://support.intel.com/support/motherboards/desktop

Intel Desktop Board D845GVAD2 Product Guide
14
RJ-45 LAN Connector LEDs
Two LEDs are built into the RJ-45 LAN connector. Table 3 describes the LED states when the
Intel desktop board is powered up and the LAN subsystem is operating.
Table 3. RJ-45 LAN Connector LEDs
LED Color LED State Indicates
Off 10 Mbit/sec data rate is selected.Green
On 100 Mbit/sec data rate is selected.
Off LAN link is not established.
On (steady state) LAN link is established.
Yellow
On (brighter and pulsing) The computer is communicating with another computer on
the LAN.
Hi-Speed USB 2.0 Support
✏ NOTE
Computer systems that have an unshielded cable attached to a USB port might not meet FCC
Class B requirements, even if no device or a low-speed USB device is attached to the cable. Use a
shielded cable that meets the requirements for a full-speed USB device.
This desktop board supports up to four USB 2.0 ports via ICH4; two ports routed to the back panel
and two routed to a USB front panel header. 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 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.
✏ NOTE
USB devices are limited to USB 1.1 transfer rates prior to operating system and driver
initialization.
Enhanced IDE Interface
The ICH4’s IDE interface handles the exchange of information between the processor and
peripheral devices like hard disks, CD-ROM drives, and Iomega Zip†drives inside the computer.
The interface supports:
• Up to four IDE devices (such as hard drives)
• ATAPI devices (such as CD-ROM drives)
• Older PIO Mode devices
• Ultra DMA-33 and ATA-66/100 protocols
• Laser servo (LS-120) drives

Desktop Board Features
15
Expansion Slots
Desktop Board D845GVAD2 has four PCI bus add-in card 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 Firmware Hub.
The BIOS can be updated by following the instructions in Chapter 3 on page 33.
PCI 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.
IDE Auto Configuration
If you install an IDE device (such as a hard drive) in your computer, the IDE 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 an IDE device. You can override the
auto-configuration options by specifying manual configuration in the BIOS Setup program.
To use ATA-66/100 features, the following items are required:
• An ATA-66/100 peripheral device
• An ATA-66/100 compatible cable
• ATA-66/100 operating system device drivers
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
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.

Intel Desktop Board D845GVAD2 Product Guide
16
Power Management Features
• Advanced Configuration and Power Interface (ACPI)
• Suspend to RAM (Instantly Available PC technology)
ACPI
ACPI gives the operating system direct control over the power management and Plug & Play
functions of a computer. The use of ACPI with Desktop Board D845GVAD2 requires an
operating system that provides full ACPI support.
Suspend to RAM (Instantly Available PC Technology)
CAUTION
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.
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. When signaled by a
wake-up device or event, the system quickly returns to its last known awake state.
The desktop board’s standby power indicator, shown in Figure 2, is lit when there is standby power
to the system. This includes the memory modules and PCI bus connectors, even when the
computer appears to be off.
If the system has a dual-colored power LED on the front panel, the sleep state is indicated by the
LED turning amber.
OM14569
Figure 2. Location of the Standby Power Indicator

Desktop Board Features
17
CAUTION
Power supplies used with this 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 Intel desktop board may lose register settings stored in memory.
For more information on standby current requirements for this desktop board, refer to the TPS by
selecting the Technical Documentation link at:
http://developer.intel.com/design/motherbd/
Hardware Management
• Power connectors
• Fan connectors
• Resume on Ring
• Wake from USB
• Wake from PS/2 keyboard/mouse
• PME# wake up support
Power Connectors
Desktop Board D845GVAD2 has two power connectors. See Figure 13 on page 62 for the location
of the power connectors.
Fan Connectors
Desktop Board D845GVAD2 has two chassis fan connectors and one processor fan connector. See
Figure 13 on page 62 for the location of the fan connectors.
Resume on Ring
The operation of Resume on Ring can be summarized as follows:
• Resumes operation from either ACPI S1 or ACPI S3 state
• Requires only one call to access the computer
• Detects incoming call similarly for external and internal modems
• Requires modem interrupt be unmasked for correct operation
Wake from USB
USB bus activity wakes the computer from an ACPI S1 or S3 state.
✏ NOTE
Wake from USB requires the use of a USB peripheral that supports Wake from USB.

Intel Desktop Board D845GVAD2 Product Guide
18
Wake from PS/2 Keyboard/Mouse
PS/2 keyboard/mouse activity wakes the computer from an ACPI S1 or S3 state.
PME# Wakeup Support
When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI S1, S3, or
S5 state.
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 board keeps the values in CMOS RAM and the clock current when the computer
is turned off. See Chapter 2 starting on page 19 for instructions on how to replace the battery.
Real-Time Clock
Desktop Board D845GVAD2 has a time-of-day clock and 100-year calendar. A battery on the
Intel desktop board keeps the clock current when the computer is turned off.

19
2 Installing and Replacing Desktop Board
Components
This chapter tells you how to:
• Install the I/O shield
• Install and remove the desktop board
• Install and remove a processor
• Install and remove memory
• Connect the IDE cable
• Connect the front panel header (not included)
• Install the front panel audio solution (not included)
• Install the front panel USB solution (not included)
• Set the BIOS configuration jumper block
• Clear passwords
• Replace the battery
Before You Begin
WARNINGS
The procedures in this chapter assume familiarity with the general terminology associated with
personal computers and with the safety practices and regulatory compliance required for using
and modifying electronic equipment.
Disconnect the computer from its power source and from any telecommunications links,
networks, or modems before performing any of the procedures described in this chapter.
Failure to disconnect power, telecommunications links, networks, or modems before you open
the computer or perform any procedures can result in personal injury or equipment damage.
Some circuitry on the board can continue to operate even though the front panel power
button is off.
CAUTION
Before you install this board in a chassis, see Appendix B for regulatory requirements and
precautions.
• Always follow the steps in each procedure in the correct order.
• Set up a log to record information about your computer, such as model, serial numbers,
installed options, and configuration information.
• Electrostatic discharge (ESD) can damage components. Perform the procedures described in
this chapter only at an ESD workstation using an antistatic wrist strap and a conductive foam
pad. If such a station is not available, you can provide some ESD protection by wearing an
antistatic wrist strap and attaching it to a metal part of the computer chassis.

Intel Desktop Board D845GVAD2 Product Guide
20
Installing the I/O Shield
The Intel desktop board comes with an I/O shield. When installed in the chassis, the shield blocks
radio frequency transmissions, protects internal components from dust and foreign objects, and
promotes correct airflow within the chassis.
Install the I/O shield before installing the desktop board in the chassis. Place the shield inside the
chassis as shown in Figure 3. Press the shield into place so that it fits tightly and securely. If the
shield doesn’t fit, obtain a properly-sized shield from the chassis supplier.
OM13621
Figure 3. Installing the I/O Shield