Intel DG41MJ User Manual

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Intel® Desktop Board DG41MJ

Product Guide

Order Number: E59138-001

Revision History

Revision

Revision History

Date

-001

First release of the Intel® Desktop Board DG41MJ Product Guide

February 2009

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 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.

Intel® Desktop Board DG41MJ 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, 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.

Preface

This Product Guide gives information about board layout, component installation, BIOS update, and regulatory requirements for Intel® Desktop Board DG41MJ.

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:

1Desktop Board Features: a summary of product features

2Installing and Replacing Desktop Board Components: instructions on how to install the Desktop Board and other hardware components

3Updating the BIOS: instructions on how to update the BIOS

AError Messages and Indicators: information about BIOS error messages and beep codes

BRegulatory Compliance: information about safety standards, EMC regulations, and product certifications

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Intel Desktop Board DG41MJ 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)

 

 

Gb

Gigabit (1,073,741,824 bits)

 

 

GHz

Gigahertz (one billion hertz)

 

 

KB

Kilobyte (1024 bytes)

 

 

MB

Megabyte (1,048,576 bytes)

 

 

Mb

Megabit (1,048,576 bits)

 

 

MHz

Megahertz (one million hertz)

 

 

iv

Contents

1

Desktop Board Features

 

 

Desktop Board Components.................................................................................

11

 

Processor..........................................................................................................

12

 

Main Memory.....................................................................................................

13

 

Intel® G41 Express Chipset .................................................................................

14

 

Graphics Support........................................................................................

14

 

Intel® GMA X4500 Graphics Controller....................................................

14

 

DVI Support .......................................................................................

14

 

Audio Subsystem ...............................................................................................

15

 

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

15

 

LAN Subsystem .................................................................................................

16

 

USB 2.0 Support ................................................................................................

17

 

Serial ATA.........................................................................................................

17

 

Expandability.....................................................................................................

17

 

BIOS................................................................................................................

17

 

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

17

 

PCI* Auto Configuration ..............................................................................

17

 

Security Passwords.....................................................................................

18

 

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

18

 

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

18

 

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

19

 

ACPI.........................................................................................................

19

 

Hardware Support ......................................................................................

19

 

Power Connectors ...............................................................................

19

 

Fan Headers .......................................................................................

20

 

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

20

 

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

20

 

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

21

 

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

22

 

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

22

 

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

22

 

Wake From Serial Devices ....................................................................

22

 

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

22

 

Speaker............................................................................................................

22

 

Battery.............................................................................................................

22

 

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

22

2

Installing and Replacing Desktop Board Components

 

 

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

23

 

Installation Precautions.......................................................................................

24

 

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

24

 

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

24

 

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

25

 

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

26

 

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

27

 

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

27

 

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

31

v

Intel Desktop Board DG41MJ Product Guide

 

 

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

31

 

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

31

 

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

32

 

Installing DIMMs ........................................................................................

33

 

Removing DIMMs........................................................................................

35

 

Using the Serial ATA (SATA) Cables ......................................................................

35

 

Connecting a Standard SATA Drive................................................................

36

 

Connecting a Slimline SATA Drive .................................................................

37

 

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

38

 

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

39

 

Chassis Intrusion Header .............................................................................

39

 

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

40

 

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

40

 

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

41

 

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

41

 

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

42

 

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

43

 

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

43

 

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

44

 

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

45

 

Clearing Passwords ............................................................................................

46

 

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

47

3

Updating the BIOS

 

 

Updating the BIOS with the Intel® Express BIOS Update Utility.................................

53

 

Updating the BIOS with the ISO Image BIOS Update File or the Iflash Memory Update

 

 

Utility .........................................................................................................

54

 

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

54

 

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

54

 

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

55

 

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

56

A

Error Messages and Indicators

 

 

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

57

 

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

57

B

Regulatory Compliance

 

 

Safety Standards ...............................................................................................

59

 

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

59

 

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

60

 

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

61

 

Recycling Considerations .............................................................................

61

 

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

63

 

EMC Regulations ................................................................................................

65

 

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

66

 

Product Certifications..........................................................................................

67

 

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

67

 

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

68

vi

Contents

Figures

1.

Intel Desktop Board DG41MJ Components ........................................................

11

2.

LAN Connector LEDs ......................................................................................

16

3.

Location of the Standby Power Indicator ...........................................................

21

4.

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

25

5.

Intel Desktop Board DG41MJ Mounting Screw Hole Locations...............................

26

6.

Lift the Socket Lever......................................................................................

27

7.

Lift the Load Plate .........................................................................................

28

8.

Remove the Protective Socket Cover ................................................................

28

9.

Remove the Processor from the Protective Processor Cover .................................

29

10.

Install the Processor .....................................................................................

29

11.

Close the Load Plate......................................................................................

30

12.

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

31

13.

Dual Channel Memory Configuration Example ...................................................

32

14.

Use DDR2 DIMMs .........................................................................................

33

15.

Installing a DIMM .........................................................................................

34

16.

Using the Standard SATA Cable ......................................................................

36

17.

Using the SATA-to-Slimline SATA Adapter Cable................................................

37

18.

Internal Headers and Connectors ....................................................................

38

19.

Back Panel Audio Connectors..........................................................................

42

20.

Location of the Chassis Fan Header .................................................................

43

21.

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

44

22.

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

45

23.

Removing the Battery ...................................................................................

51

Tables

1.

Feature Summary...........................................................................................

9

2.

Intel Desktop Board DG41MJ Components.........................................................

12

3.

Audio Jack Retasking Support..........................................................................

15

4.

LAN Connector LEDs ......................................................................................

16

5.

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

39

6.

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

39

7.

Chassis Intrusion Header Signal Names ............................................................

39

8.

USB 2.0 Header Signal Names.........................................................................

40

9.

Serial Port Header Signal Names......................................................................

40

10.

Alternate Front Panel Power LED Header Signal Names ......................................

41

11.

Front Panel Header Signal Names....................................................................

41

12.

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

46

13. Beep Codes..................................................................................................

57

14.

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

57

15.

Safety Standards ..........................................................................................

59

16.

Lead-Free Board Markings..............................................................................

64

17.

EMC Regulations...........................................................................................

65

18.

Product Certification Markings ........................................................................

67

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Intel Desktop Board DG41MJ Product Guide

viii

1 Desktop Board Features

This chapter briefly describes the features of Intel® Desktop Board DG41MJ. Table 1 summarizes the major features of the Desktop Board.

Table 1. Feature Summary

Form Factor

Mini-ITX (170.18 millimeters [6.70 inches] x 170.18 millimeters

 

[6.70 inches])

 

 

 

Processor

Support for an Intel® processor in the LGA775 package

Main Memory

Two 240-pin, DDR2 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

 

 

 

Chipset

Intel® G41 Express Chipset consisting of:

 

Intel G41 Express Chipset Graphics and Memory Controller Hub

 

 

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

 

 

X4500)

 

Intel® 82801GB I/O Controller Hub (ICH7)

Graphics

Intel G41 Express Chipset Graphics and Memory Controller Hub

 

 

(GMCH)

 

Integrated graphics (Intel® GMA X4500) with VGA and DVI-D

 

 

outputs

 

One PCI* bus connector supporting PCI graphics cards

 

 

 

 

Audio

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

 

 

streaming mode, featuring:

 

 

― Realtek* ALC888VC audio codec

 

 

― Support for Intel® High Definition Audio (Intel® HD Audio) and

 

 

AC ’97 Audio

 

 

 

LAN Support

Realtek 8111D Gigabit Ethernet Controller for operation at

 

10/100/1000 Mb/s

 

 

 

 

Expansion

One PCI bus connector

Capabilities

 

 

 

 

 

 

 

Peripheral

Up to eight USB 2.0 ports:

Interfaces

 

― Four ports routed to the back panel

 

 

 

 

― Four ports routed to two USB headers

 

Three Serial ATA (SATA) channels (3.0 Gb/s) via ICH7

 

One serial port header

 

PS/2* keyboard port on the back panel

 

 

 

 

continued

9

Intel Desktop Board DG41MJ Product Guide

Table 1. Feature Summary (continued)

BIOS

Intel® Platform Innovation Framework for extensible firmware

 

 

interface

 

8 Mb symmetrical flash memory device

 

Support for SMBIOS

 

Intel® Rapid BIOS Boot

 

Intel® Express BIOS Update

Power Management

Support for Advanced Configuration and Power Interface (ACPI)

 

Suspend to RAM (STR)

 

Wake on USB, 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

The Desktop Board supports the following operating systems:

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

 

 

 

For more information on Intel Desktop Board DG41MJ consult the following online resources:

To find information

Visit this World Wide Web site:

about…

 

Intel Desktop Board

http://www.intel.com/products/motherboard/DG41MJ/index.htm

DG41MJ

 

Desktop Board Support

http://support.intel.com/support/motherboards/desktop/DG41MJ

Available configurations

http://www.intel.com/products/motherboard/DG41MJ/index.htm

for Intel Desktop Board

 

DG41MJ

 

Supported processors

http://processormatch.intel.com

Chipset information

http://www.intel.com/products/desktop/chipsets/index.htm

BIOS and driver updates

http://downloadcenter.intel.com/

Integration information

http://www.intel.com/support/go/buildit

10

Desktop Board Features

Desktop Board Components

Figure 1 shows the approximate location of the major components on Intel Desktop Board DG41MJ.

Figure 1. Intel Desktop Board DG41MJ Components

11

Intel Desktop Board DG41MJ Product Guide

Table 2. Intel Desktop Board DG41MJ Components

Label

Description

 

 

A

Front panel audio header

 

 

B

Back panel connectors

 

 

C

12 V processor core voltage connector (2 x 2 pin)

 

 

D

High-speed USB 2.0 headers (2)

 

 

E

BIOS configuration jumper block

 

 

F

Alternate front panel power LED header

 

 

G

Processor socket

 

 

H

Chassis fan header

 

 

I

Processor fan header

 

 

J

Serial port header

 

 

K

Main power connector (2 x 12 pin)

 

 

L

Battery

 

 

M

Speaker

 

 

N

DDR2 Channel B DIMM 0 socket

 

 

O

DDR2 Channel A DIMM 0 socket

 

 

P

Front panel header

 

 

Q

Serial ATA connectors (3)

 

 

R

PCI bus connector

 

 

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 DG41MJ 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, G).

For instructions on installing a processor, refer to page 27 in Chapter 2.

12

Desktop Board Features

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:

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 singleor 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 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.

For instructions on installing memory, refer to page 32 in Chapter 2.

13

Intel Desktop Board DG41MJ Product Guide

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

Graphics Support

The Intel G41 Express Chipset supports two separate, mutually exclusive graphics options. Either the integrated Intel® Graphics Media Accelerator X4500 (Intel® GMA X4500) graphics controller is used or a PCI graphics add-in card can be used.

When a PCI graphics add-in card is installed, the Intel GMA X4500 graphics controller is disabled.

The GMA X4500 graphics controller supports dual independent displays via the VGA and DVI-D connectors on the Desktop Board back panel.

Intel® GMA X4500 Graphics Controller

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:

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

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

DVI Support

The DVI-D port supports digital DVI displays. The maximum supported resolution is 2048 x 1536 at 75 Hz (QXGA). The DVI port is compliant with the DVI 1.0 specification.

14

Desktop Board Features

Audio Subsystem

The onboard audio subsystem consists of the following:

Intel® ICH7

Realtek ALC888VC audio codec

Back panel audio connectors (see Figure 19)

Front panel audio header supporting both Intel High Definition Audio and AC ’97 Audio (see Figure 18, A)

The audio subsystem supports the following features:

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

Independent 5.1 audio playback from the back panel connectors and stereo playback from the Intel High Definition Audio front panel header

Table 3 lists the supported functions for the front panel and back panel audio jacks.

Table 3. Audio Jack Retasking Support

Jack

Mic

Line out

Headphones

Line in

Rear

Center/

Surround

Subwoofer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

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

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

15

Intel Desktop Board DG41MJ Product Guide

LAN Subsystem

The LAN subsystem includes:

Intel ICH7

Realtek 8111D-GR 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

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 Connector LEDs

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 (Link)

Green

Off

LAN link is not established.

 

 

 

 

 

 

On

LAN link is established.

 

 

 

 

 

 

Blinking

LAN activity is occurring.

 

 

 

 

B (Data

N/A

Off

10 Mb/s data rate is selected.

Rate)

 

 

 

Green

On

100 Mb/s data rate is selected.

 

 

 

 

 

 

Yellow

On

1000 Mb/s data rate is selected.

 

 

 

 

16

Desktop Board Features

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 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.

Serial ATA

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

Expandability

For system expansion, the Desktop Board includes one PCI bus connector.

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 53 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* 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.

17

Intel Desktop Board DG41MJ 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.

For instructions on resetting the password, see Clearing Passwords on page 46.

Hardware Management Features

The hardware management features of Intel Desktop Board DG41MJ 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 acousticallyoptimized thermal management. Fan speed controllers and sensors are integrated into the legacy I/O controller.

Thermally monitored closed-loop fan control, for onboard fans, that can adjust fan speed according to thermal conditions.

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

18

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 from PS/2 devices

Wake from serial port

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 21 on page 44 for the location of the power connectors.

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Intel Desktop Board DG41MJ Product Guide

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 chassis fan header has an independent tachometer input to the hardware monitoring and fan control device.

All fan headers support closed-loop fan control that can adjust the fan speed according to thermal conditions.

All fan headers have a +12 V DC connection.

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.

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-to- RAM) 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.

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Desktop Board Features

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 connector.

Figure 3. Location of the Standby Power Indicator

For more information on standby current requirements for the Desktop Board, refer to the Technical Product Specification at http://www.intel.com/products/motherboard/DG41MJ/index.htm.

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