Intel BOXDG41MJ, DG41MJ Product Manual
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
GRANTED BY THIS DOCUMENT. EXCEPT AS PROVIDED IN INTEL’S TERMS AND CONDITIONS OF SALE FOR
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IMPLIED WARRANTY, RELATING TO SALE AND/OR USE OF INTEL PRODUCTS INCLUDING LIABILITY OR
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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 DG41MJ 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:
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* 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 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:
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 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
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
ENERGY STAR* Capable ..............................................................................22
Speaker............................................................................................................22
Battery.............................................................................................................22
Real-Time Clock.................................................................................................22
®
Intel
GMA X4500 Graphics Controller....................................................14
DVI Support .......................................................................................14
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
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
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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
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
®
Express BIOS Update Utility.................................53
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
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
Mini-ITX (170.18 millimeters [6.70 inches] x 170.18 millimeters
[6.70 inches])
• 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
• 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 (Intel
• One PCI* bus connector supporting PCI graphics cards
• 5.1 channel in single-stream mode or 4 + 2 channel in multi-
• One PCI bus connector
• Up to eight USB 2.0 ports:
• Three Serial ATA (SATA) channels (3.0 Gb/s) via ICH7
• One serial port header
• PS/2* keyboard port on the back panel
®
82801GB I/O Controller Hub (ICH7)
(GMCH)
®
GMA X4500) with VGA and DVI-D
outputs
streaming mode, featuring:
― Realtek* ALC888VC audio codec
― Support for Intel
AC ’97 Audio
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 (Intel® HD Audio) and
continued
9
Intel Desktop Board DG41MJ Product Guide
Table 1. Feature Summary (continued)
BIOS
Power Management
Hardware Monitor
Supported
Operating Systems
• Intel
• 8 Mb symmetrical flash memory device
• Support for SMBIOS
• Intel
• Intel
• Support for Advanced Configuration and Power Interface (ACPI)
• Suspend to RAM (STR)
• Wake on USB, LAN, PS/2, and front panel
• ENERGY STAR* capable
• 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
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
For more information on Intel Desktop Board DG41MJ consult th e following online
resources:
To find information
about…
Intel Desktop Board
DG41MJ
Desktop Board Support http://support.intel.com/support/motherboards/desktop/DG41MJ
Available configurations
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
Visit this World Wide Web site:
http://www.intel.com/products/motherboard/DG41MJ/index.htm
http://www.intel.com/products/motherboard/DG41MJ/index.htm
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).
F
or 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 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 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.
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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
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.
®
Graphics Media Accelerator X4500 (Intel®
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
Audio Subsystem
The onboard audio subsystem consists of the following:
®
• Intel
• Realtek ALC888VC audio codec
• Back panel audio connectors (see Figure 19)
• Front pa
ICH7
nel audio header supporting both Intel High Definition Audio and AC ’97
Audio (see Figure 18, A)
Desktop Board Features
The audio subsys
tem 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 pa
nel and back panel 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
Legacy Input/Output (I/O) Controller
Center/
Subwoofer
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 th
e 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) Off LAN link is not established.
Blinking LAN activity is occurring.
B (Data
Rate)
Green
On LAN link is established.
N/A Off 10 Mb/s data rate is selected.
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 acoustically-
optimized 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 co
nnectors.
19
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-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.
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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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