Intel BLKDG41RQ - Bulk Single Uatx G41 Exp Chip, BOXDG41RQ, DG41RQ Product Manual

Intel® Desktop Board DG41RQ
Product Guide

Order Number: E59137-001

Revision History

Revision Revision History Date

-001 First release of the Intel® Desktop Board DG41RQ Product Guide December 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 DG41RQ may contain design defects or errors known as errata which may cause the

Intel
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, the Intel logo, Pentium, and Celeron 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 © 2009, 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 DG41RQ.

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 DG41RQ 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.....................................................................................................14

®

Intel

G41 Express Chipset .................................................................................15

Audio Subsystem ...............................................................................................16

Legacy Input/Output (I/O) Controller....................................................................17

LAN Subsystem .................................................................................................17

Hi-Speed USB 2.0 Support ..................................................................................18

Enhanced IDE Interface ......................................................................................18

Serial ATA.........................................................................................................18

Expandability.....................................................................................................19

BIOS................................................................................................................19

Serial ATA and IDE Auto Configuration...........................................................19

PCI* and PCI Express* Auto Configuration .....................................................19

Security Passwords.....................................................................................20

Hardware Management Features ..........................................................................20

Hardware Monitoring and Fan Speed Control ..................................................20

Power Management Features ...............................................................................21

ACPI.........................................................................................................21

Hardware Support ......................................................................................21

Power Connectors ...............................................................................21

Fan Headers .......................................................................................21

LAN Wake Capabilities..........................................................................22

Instantly Available PC Technology..........................................................22

+5 V Standby Power Indicator LED ........................................................23

Wake from USB Support.......................................................................23

PME# Signal Wake-up Support..............................................................23

WAKE# Signal Wake-up Support ...........................................................24

Wake From PS/2 Devices......................................................................24

ENERGY STAR* Capable ..............................................................................24

Speaker............................................................................................................24

Battery.............................................................................................................24

Real-Time Clock.................................................................................................24

2 Installing and Replacing Desktop Board Components

Before You Begin ...............................................................................................25

Installation Precautions.......................................................................................26

Prevent Power Supply Overload ....................................................................26

Observe Safety and Regulatory Requirements.................................................26

Installing the I/O Shield ......................................................................................27

Installing and Removing the Desktop Board ...........................................................28

Installing and Removing a Processor.....................................................................29

Installing a Processor ..................................................................................29

Installing the Processor Fan Heat Sink ...........................................................33

Connecting the Processor Fan Heat Sink Cable................................................33

Removing the Processor ..............................................................................33

v

Intel Desktop Board DG41RQ Product Guide

Installing and Removing Memory..........................................................................34

Installing DIMMs ........................................................................................35

Removing DIMMs........................................................................................37

Installing and Removing a PCI Express x16 Card ....................................................37

Installing a PCI Express x16 Card .................................................................38

Removing the PCI Express x16 Card..............................................................39

Connecting the IDE Cable....................................................................................40

Connecting the Serial ATA (SATA) Cables ..............................................................41

Connecting to the Internal Headers and Connectors ................................................42

Front Panel Audio Header ............................................................................43

S/PDIF Connector.......................................................................................43

Serial Port Header ......................................................................................44

Parallel Port Header ....................................................................................44

Front Panel Header .....................................................................................45

Alternate Front Panel Power LED Header........................................................45

USB 2.0 Headers ........................................................................................46

Connecting to the Back Panel Audio Connectors......................................................47

Connecting Chassis Fan and Power Supply Cables...................................................48

Connecting a Chassis Fan Cable....................................................................48

Connecting Supply Power Cables ..................................................................49

Setting the BIOS Configuration Jumper .................................................................50

Clearing Passwords ............................................................................................51

Replacing the Battery .........................................................................................52

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...............................................................................................58

Obtaining the BIOS Update File ....................................................................58

Updating the BIOS with the ISO Image BIOS Update File .................................58

Updating the BIOS with the Iflash Memory Update Utility .................................59

Recovering the BIOS...................................................................................60

®

Express BIOS Update Utility.................................57

A Error Messages and Indicators

BIOS Beep Codes...............................................................................................61

BIOS Error Messages..........................................................................................61

B Regulatory Compliance

Safety Standards ...............................................................................................63

Place Battery Marking .................................................................................63

European Union Declaration of Conformity Statement..............................................64

Product Ecology Statements ................................................................................65

Recycling Considerations .............................................................................65

Lead-Free Desktop Board.............................................................................67

EMC Regulations ................................................................................................69

Ensure Electromagnetic Compatibility (EMC) Compliance..................................70

Product Certifications..........................................................................................71

Board-Level Certification Markings ................................................................71

Chassis and Component Certifications............................................................72

vi

Contents

Figures

1. Intel Desktop Board DG41RQ Components .......................................................11

2. LAN Connector LEDs .....................................................................................17

3. Location of the Standby Power Indicator ..........................................................23

4. Installing the I/O Shield ................................................................................27

5. Intel Desktop Board DG41RQ Mounting Screw Hole Locations .............................28

6. Lift the Socket Lever.....................................................................................29

7. Lift the Load Plate.........................................................................................30

8. Remove the Protective Socket Cover ...............................................................30

9. Remove the Processor from the Protective Processor Cover ................................31

10. Install the Processor .....................................................................................31

11. Close the Load Plate .....................................................................................32

12. Connecting the Processor Fan Heat Sink Cable to the Processor Fan Header..........33

13. Dual Channel Memory Configuration Example ...................................................34

14. Use DDR2 DIMMs .........................................................................................35

15. Installing a DIMM .........................................................................................36

16. Installing a PCI Express x16 Card ...................................................................38

17. Removing a PCI Express x16 Card ..................................................................39

18. Connecting the IDE Cable ..............................................................................40

19. Connecting a Serial ATA Cable........................................................................41

20. Internal Headers and Connectors....................................................................42

21. Back Panel Audio Connectors .........................................................................47

22. Location of the Rear Chassis Fan Header..........................................................48

23. Connecting Power Supply Cables ....................................................................49

24. Location of the BIOS Configuration Jumper Block ..............................................50

25. Removing the Battery ...................................................................................56

Tables

1. Feature Summary.......................................................................................... 9

2. Intel Desktop Board DG41RQ Components .......................................................12

3. Audio Jack Retasking Support.........................................................................16

4. LAN Connector LEDs .....................................................................................18

5. Front Panel Audio Signal Names for Intel HD Audio............................................43

6. Front Panel Audio Header Signal Names for AC’97 Audio ....................................43

7. S/PDIF Connector .........................................................................................43

8. Serial Port Header Signal Names.....................................................................44

9. Parallel Port Header Signal Names ..................................................................44

10. Front Panel Header .......................................................................................45

11. Alternate Front Panel Power LED Header..........................................................45

12. USB 2.0 Header Signal Names........................................................................46

13. Jumper Settings for the BIOS Setup Program Modes..........................................50

14. Beep Codes .................................................................................................61

15. BIOS Error Messages ....................................................................................61

16. Safety Standards..........................................................................................63

17. Lead-Free Board Markings .............................................................................68

18. EMC Regulations...........................................................................................69

19. Product Certification Markings ........................................................................71

vii

Intel Desktop Board DG41RQ Product Guide

viii

1 Desktop Board Features

This chapter briefly describes the features of Intel® Desktop Board DG41RQ. 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® G41 Express Chipset consisting of:

Graphics

Audio

LAN Support

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 SDRAM Dual Inline Memory Module

(DIMM) sockets

• 800/667 MHz single or dual channel DDR2 SDRAM interface

• Support for up to 8 GB of system memory

• Intel G41 Express Chipset Graphics and Memory Controller Hub

(GMCH) with Intel® Graphics Media Accelerator X4500 (Intel® GMA
X4500)

• Intel

• Intel G41 Express Chipset Graphics and Memory Controller Hub

• Integrated graphics output for VGA

• One PCI Express* x16 connector supporting PCI Express graphics

• Two PCI connectors supporting PCI graphics cards

• 5.1 channel in single-stream mode or 4 + 2 channel in multi-

• Onboard S/PDIF connector

• One PCI Express x16 connector

• One PCI Express x1 connector

• Two PCI* bus connectors

• Up to eight USB 2.0 ports:

• Four Serial ATA (SATA) channels (3.0 Gb/s) via the ICH7

• One IDE interface with ATA-66/100 support (two devices)

• One VGA connector

• One parallel port header

• One serial port header

• PS/2* keyboard and mouse connectors

®

82801GB I/O Controller Hub (ICH7)

(GMCH)

cards

streaming mode, featuring:

― Realtek* ALC662 audio codec
― Support for Intel

Realtek 8111D Gigabit Ethernet Controller for operation at
10/100/1000 Mb/s

― Four ports routed to the back panel
― Four ports routed to two USB headers

®

High Definition Audio and AC ’97 Audio

continued

9

Intel Desktop Board DG41RQ Product Guide

Table 1. Feature Summary (continued)

BIOS

• Intel

• 8 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 Express, LAN, PS/2, 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

The Desktop Board supports the following operating systems:

• Microsoft Windows Vista* Home Premium

• Microsoft Windows Vista Home Basic

• Microsoft Windows Vista Home Premium 64-bit edition

• Microsoft Windows Vista Home Basic 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

Related Links:

For more information about Intel Desktop Board DG41RQ, 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 Intel Desktop
Board DG41RQ.

Figure 1. Intel Desktop Board DG41RQ Components

11

Intel Desktop Board DG41RQ Product Guide

Table 2. Intel Desktop Board DG41RQ Component s

Label Description

A PCI bus connector 2
B PCI bus connector 1
C PCI Express x16 connector
D Rear chassis fan header (3-pin)
E Back panel connectors
F Parallel port header
G 12 V processor core voltage connector (2 x 2 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 Main power connector (2 x 12 pin)
M IDE connector
N Battery
O Alternate front panel power LED header
P Front panel header
Q Serial ATA connectors (4)
R BIOS configuration jumper block
S High-speed USB 2.0 headers (2)
T Speaker
U Serial port header
V S/PDIF connector
W Front panel audio header

Go to the following links for more information about:

• Intel Desktop Board

DG41RQ

• Supported processors

• Audio software and utilities

• LAN software and drivers

http://www.intel.com/design/motherbd
http://support.intel.com/support/motherboards/desktop

http://processormatch.intel.com
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.

Intel Desktop Board DG41RQ 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
(Figure 1, H).

Go to the

• Instructions on installing or upgrading the processor, page 29 in Chapter 2

• Supported processors for Intel Des

fo

llowing page or link for more information about:

http://processormatch.intel.com

ktop Board DG41RQ,

13

Intel Desktop Board DG41RQ Product Guide

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 has two DIMM sockets that support the memory features listed
below:

• 1.8 V DDR2 SDRAM DIMMs with the option in the BIOS setup to raise the voltage

to support higher performance DDR2 SDRAM DIMMs

• Support for:

⎯ Non-ECC DDR2 800/667 MHz memory
⎯ Serial Presence Detect (SPD) memory only
⎯ Unbuffered, non-registered single- or double-sided DIMMs
⎯ Memory configurations listed below:

• Up to 2.0 GB utilizing 256 Mb technology

• Up to 8.0 GB utilizing 512 Mb or 1 Gb technology

• A minimum of 512 MB of total memory is required

NOTE

System resources and hardware (such as PCI Express) require physical memory
address locations that can reduce available addressable system memory. This could
result in a reduction of as much as 1 GB or more of physical addressable memory
being available to the operating system and applications, depending on the system
configuration and operating system.

Go to the following locations for more information about:

• SDRAM specifications, http://intel.com/technology/memory/

• Installing memory, page 34 in Chapter 2

• Tested memory, http://cmtlabs.com/mbsearch.asp

14

Desktop Board Features

Intel® G41 Express Chipset

The Intel G41 Express Chipset consists of the following devices:

• Intel G41 Express Chipset Graphics and Memory Controller Hub (GMCH) with Direct

Media Interface (DMI)

• Intel 82801GB I/O Controller Hub (ICH7) with DMI
The GMCH component provides interfaces to the processor, memory, PCI Express, and

the DMI interconnect. The component also provides integrated graphics capabilities
supporting 3D, 2D, and display capabilities. The ICH7 is a centralized controller for
the board’s I/O paths.

Go to the following link for more information about the Intel G41 Express Chipset:

http://developer.intel.com/products/chipsets/index.htm

The Intel G41 Express Chipset supports two separate, mutually exclusive graphics
options. Either the integrated Intel
GMA X4500) graphics controller is used or a PCI Express x16 add-in card can be used.
When a PCI Express x16 add-in card is installed, the Intel GMA X4500 graphics
controller is disabled.

The Intel GMA X4500 graphics controller has the following features:

• Advanced graphics performance, including:

⎯ DirectX10.0* and OpenGL* 2.0 compliant

⎯ Shader Model 4.0 support

• Enhanced video playback support, including:

⎯ Support for playback of Blu-ray Disc* technology DVDs

o Microsoft Windows Vista* only
o Hardware acceleration supported for MPEG-2 only

⎯ Software DVD at 30 fps full screen

⎯ Dynamic Video Memory Technology (DVMT) 5.0

• Advanced display support, including:

⎯ High Definition Content Protection (HDCP) version 1.1 support

⎯ DDC2B compliant interface with Advanced Digital Display 2 card or Media

Expansion Card (ADD2/MEC); support for TV-out/TV-in and DVI digital display
connections

⎯ Support for all HD display resolutions including 720p, 1080i, and 1080p

⎯ Support for digital and analog displays up to 2048 x 1536 at 75 Hz refresh rate

(QXGA); also supports 1920 x 1080 resolution for full High Definition video
playback quality

®

Graphics Media Accelerator X4500 (Intel®

15

Intel Desktop Board DG41RQ Product Guide

Audio Subsystem

The onboard audio subsystem consists of the following:

®

• Intel

• Realtek ALC662 audio codec

• Back panel audio connectors

• Onboard audio headers/connectors:

The audio subsystem supports the following features:

• A signal-to-noise (S/N) ratio of 95 dB

• 5.1 audio in single-streaming mode

• 4 + 2 channel in multi-streaming mode

ICH7

⎯ Front panel audio header supporting both Intel High Definition Audio and AC ’97

Audio

⎯ HD Audio Link header

⎯ S/PDIF connector

Table 3 lists the supported functions for the front pa

nel and back pane

l audio jacks.

Table 3. Audio Jack Ret asking Support

Jack Mic Line out Headphones Line in

Front Panel

Green No Yes Yes No No No
Pink Yes No No No No No

Back Panel

Blue No No No Yes Yes No
Green No Yes Yes No No No
Pink Yes No No No No Yes

Rear
Surround

Center/
Subwoofer

Go to the following link or pages for more information about:

• Audio drivers and utilities http://support.intel.com/support/motherboards/desktop/

• The location of the back panel audio connectors, Figure 21 on page 47

16

Desktop Board Features

Legacy Input/Output (I/O) Controller

The Winbond 83627DHG-P legacy I/O controller provides the following functions:

• One serial port interface via an onboard header

• One parallel 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

• Realtek 8111D Gigabit Ethernet Controller for operation at 10/100/1000 Mb/s

• 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

Go to the following link for information about LAN software and drivers:

http://support.intel.com/support/motherboards/desktop

Two LEDs are built into the RJ-45 LAN connector located on the back panel (see
Figure 2). These LEDs indicate the statu

Figure 2. LAN Connector LEDs

s of the LAN.

17

Intel Desktop Board DG41RQ Product Guide

Table 4 describes the LED states when the board is powered up and the LAN
subsystem is operating.

Table 4. LAN Connector LEDs

LED LED Color LED State Indicates

A Off LAN link is not established

Blinking LAN activity is occurring
B

Green

On LAN link is established

N/A Off 10 Mb/s data rate
Green On 100 Mb/s data rate
Yellow On 1000 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.

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 four Serial ATA channels (3.0 Gb/s) via ICH7, connecting
one device per channel.

18

Desktop Board Features

Expandability

For system expansion, the Desktop Board provides the following expansion slots:

• One PCI Express x16 connector

• Two PCI bus connectors

BIOS

The BIOS provides the Power-On Self-Test (POST), the BIOS Setup program, the
PCI/PCI Express 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 57 in Chapter 3.

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 PCI Express* Auto Configuration

If you install a PCI/PCI Express add-in card in your computer, the PCI/PCI Express
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/PCI Express add-in card.

19

Intel Desktop Board DG41RQ 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 51.

Hardware Management Features

The hardware management features of Intel Desktop Board DG41RQ enable the board
to be compatible with the Wired for Management (WfM) specification. The board has
several hardware management features including the following:

• Fan speed monitoring and control

• Thermal and voltage monitoring

Hardware Monitoring and Fan Speed Control

Features of the board’s hardware monitoring and fan speed control include:

• Monitoring of power supply voltages to detect levels above and below acceptable

values

• Smart fan control provided by the legacy I/O controller, delivering acoustically-

optimized thermal management. Fan speed controllers and sensors are integrated

into the legacy I/O controller.

• Thermally monitored closed-loop fan control, for all onboard fans, that can adjust

fan speed according to thermal conditions

• Two thermal sensors (processor and a remote thermal sensor)

20

Desktop Board Features

Power Management Features

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#) wake-up support

⎯ WAKE# signal wake-up support

⎯ Wake from PS/2 devices

• ENERGY STAR capable

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 Figure 23 on page 49 for the
location of the power co

nnectors

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.

• The processor fan header is wired to a fan tachometer input. The rear chassis fan

header has an independent tachometer input to the hardware monitoring and fan

control device.

.

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Intel Desktop Board DG41RQ Product Guide

• All fan headers support closed-loop fan control that can adjust the fan speed

according to thermal conditions.

• All fan headers have a +12 V DC connection.
The Desktop Board has a 4-pin processor fan header and a 3-pin rear 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.

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.

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