Intel DH57DD User manual

Intel®Desktop Board DH57DD
Product Guide
Order Number: E89649-001

Revision History
Revision Revision History Date
-001 First release of the Intel®Desktop Board DH57DD Product Guide February 2010
Disclaimer
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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.
Intel Desktop Board DH57DD 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:
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Intel, Intel Core, and Pentium are trademarks of Intel Corporation in the United States and other countries.
* Other names and brands may be claimed as the property of others.
Copyright © 2010, Intel Corporation. All rights reserved.

iii
Preface
This Product Guide gives information about board layout, component installation, BIOS
update, and regulatory requirements for Intel®Desktop Board DH57DD.
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: describes the board’s adherence to safety standards and
EMC regulations and its product certifications
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.

Intel Desktop Board DH57DD Product Guide
iv
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)
Mb Megabit (1,048,576 bits)
MHz Megahertz (one million hertz)

v
Contents
1Desktop Board Features
Supported Operating Systems..............................................................................11
Desktop Board Components.................................................................................12
Processor..........................................................................................................14
Intel®H57 Express Chipset .................................................................................15
Main Memory.....................................................................................................15
Graphics Subsystem...........................................................................................16
Integrated Graphics ....................................................................................16
Intel®HD Graphics ..............................................................................16
High-Definition Multimedia Interface* (HDMI*)........................................16
Digital Visual Interface (DVI-I) ..............................................................17
VGA Displays ......................................................................................17
PCI Express* x16 Graphics ..........................................................................17
Audio Subsystem ...............................................................................................18
LAN Subsystem .................................................................................................19
USB 2.0 Support................................................................................................19
SATA Support....................................................................................................20
Expandability.....................................................................................................20
Legacy I/O........................................................................................................20
BIOS................................................................................................................20
SATA Auto Configuration .............................................................................20
PCI*/PCI Express Auto Configuration.............................................................21
Security Passwords.....................................................................................21
Hardware Management .......................................................................................21
Hardware Monitoring and Fan Speed Control ..................................................21
Fan Monitoring ...........................................................................................22
Chassis Intrusion........................................................................................22
Power Management............................................................................................22
Software Support .......................................................................................22
ACPI..................................................................................................22
Hardware Support ......................................................................................23
Power Connectors ...............................................................................23
Fan Headers .......................................................................................23
LAN Wake Capabilities..........................................................................23
Instantly Available PC Technology..........................................................24
+5 V Standby Power Indicator LED ........................................................24
Wake from USB ..................................................................................25
PCI Express WAKE# Signal Wake-up Support..........................................25
Wake from Serial Port..........................................................................25
Wake from CIR ...................................................................................26
Speaker............................................................................................................26
Real-Time Clock Subsystem.................................................................................26

Intel Desktop Board DH57DD Product Guide
vi
2Installing and Replacing Desktop Board Components
Before You Begin ...............................................................................................27
Installation Precautions.......................................................................................28
Prevent Power Supply Overload ....................................................................28
Observe Safety and Regulatory Requirements.................................................28
Installing the I/O Shield ......................................................................................29
Installing and Removing the Desktop Board ...........................................................30
Installing and Removing a Processor.....................................................................31
Installing a Processor ..................................................................................31
Installing a Processor Fan Heat Sink..............................................................36
Connecting the Processor Fan Heat Sink Cable................................................36
Removing the Processor ..............................................................................36
Installing and Removing System Memory ..............................................................37
Guidelines for Dual Channel Memory Configuration..........................................37
Two or Four DIMMs .............................................................................37
Three DIMMs ......................................................................................38
Installing DIMMs ........................................................................................39
Removing DIMMs........................................................................................41
Installing and Removing PCI Express x16 Graphics Cards.........................................41
Installing a PCI Express x16 Graphics Card ....................................................41
Removing a PCI Express x16 Graphics Card....................................................43
Connecting SATA Cables .....................................................................................44
Connecting to the Internal Headers ......................................................................45
Front Panel Audio Header ............................................................................46
IEEE 1394a Headers ...................................................................................46
S/PDIF Header ...........................................................................................47
Serial Header.............................................................................................47
Consumer IR (CIR) Headers .........................................................................47
Intel®RPAT Header.....................................................................................48
Chassis Intrusion Header .............................................................................48
Alternate Front Panel Power LED Header ........................................................49
Front Panel Header .....................................................................................49
Front Panel USB 2.0 Headers........................................................................50
HD Audio Link Header .................................................................................50
Connecting to the Audio System...........................................................................51
Connecting Chassis Fan and Power Supply Cables...................................................52
Connecting a Chassis Fan ............................................................................52
Connecting Power Supply Cables ..................................................................53
Setting the BIOS Configuration Jumper .................................................................54
Clearing Passwords ............................................................................................55
Replacing the Battery .........................................................................................56
3Updating the BIOS
Updating the BIOS with the Intel®Express BIOS Update Utility.................................63
Updating the BIOS with the ISO Image BIOS Update File or the Intel®Flash
Memory Update Utility...................................................................................64
Obtaining the BIOS Update File ....................................................................64
Updating the BIOS with the ISO Image BIOS Update File .................................64
Updating the BIOS with the Intel Flash Memory Update Utility...........................65
Recovering the BIOS...................................................................................66

Contents
vii
AError Messages and Indicators
BIOS Error Codes...............................................................................................67
BIOS Error Messages..........................................................................................68
BRegulatory Compliance
Safety Standards ...............................................................................................69
Battery Caution ..........................................................................................69
European Union Declaration of Conformity Statement..............................................70
Product Ecology Statements ................................................................................71
Recycling Considerations .............................................................................71
China RoHS ...............................................................................................74
EMC Regulations ................................................................................................75
FCC Declaration of Conformity......................................................................75
Canadian Department of Communications Compliance Statement......................76
Japan VCCI Statement ................................................................................76
Korea Class B Statement .............................................................................77
Ensure Electromagnetic Compatibility (EMC) Compliance..................................77
Product Certifications..........................................................................................78
Board-Level Certifications ............................................................................78
Chassis- and Component-Level Certifications..................................................79
ENERGY STAR*, e-Standby, and ErP Compliance ....................................................79
Figures
1. Intel Desktop Board DH57DD Components .......................................................12
2. LAN Connector LEDs .....................................................................................19
3. Location of the Standby Power Indicator ..........................................................25
4. Installing the I/O Shield ................................................................................29
5. Intel Desktop Board DH57DD Mounting Screw Hole Locations .............................30
6. Unlatch the Socket Lever...............................................................................31
7. Lift the Load Plate.........................................................................................32
8. Remove the Socket Cover..............................................................................33
9. Remove the Processor from the Protective Cover ..............................................34
10. Install the Processor .....................................................................................34
11. Lower the Load Plate.....................................................................................35
12. Secure the Load Plate in Place........................................................................35
13. Connecting the Processor Fan Heat Sink Power Cable to the
Processor Fan Header....................................................................................36
14. Example Dual Channel Memory Configuration with Two DIMMs ...........................37
15. Example Dual Channel Memory Configuration with Four DIMMs...........................38
16. Example Dual Channel Memory Configuration with Three DIMMs .........................38
17. Use DDR3 DIMMs .........................................................................................39
18. Installing a DIMM .........................................................................................40
19. Installing a PCI Express x16 Graphics Card ......................................................42
20. Removing a PCI Express x16 Graphics Card......................................................43
21. Connecting a SATA Cable...............................................................................44

Intel Desktop Board DH57DD Product Guide
viii
22. Internal Headers ..........................................................................................45
23. Back Panel Audio Connectors .........................................................................51
24. Location of the Chassis Fan Header .................................................................52
25. Connecting Power Supply Cables ....................................................................53
26. Location of the BIOS Configuration Jumper Block ..............................................54
27. Removing the Battery ...................................................................................61
28. Intel Desktop Board DH57DD China RoHS Material Self Declaration Table .............74
Tables
1. Feature Summary.......................................................................................... 9
2. Intel Desktop Board DH57DD Components .......................................................13
3. HDMI Port Status Conditions ..........................................................................16
4. DVI Port Status Conditions.............................................................................17
5. Audio Jack Retasking Support.........................................................................18
6. LAN Connector LEDs .....................................................................................19
7. Front Panel Audio Signal Names for Intel HD Audio............................................46
8. Front Panel Audio Header Signal Names for AC ’97 Audio ...................................46
9. IEEE 1394a Headers Signal Names..................................................................46
10. S/PDIF Header Signal Names .........................................................................47
11. Serial Port Header ........................................................................................47
12. Front Panel CIR Receiver (Input) Header Signal Names......................................48
13. Back Panel CIR Emitter (Output) Header Signal Names ......................................48
14. Intel RPAT Header Signal Names ....................................................................48
15. Chassis Intrusion Header Signal Names ...........................................................48
16. Alternate Front Panel Power LED Header Signal Names ......................................49
17. Front Panel Header Signal Names ...................................................................49
18. USB 2.0 Header Signal Names........................................................................50
19. HD Audio Link Header Signal Names ...............................................................50
20. Jumper Settings for the BIOS Setup Program Modes..........................................55
21. BIOS Beep Codes .........................................................................................67
22. Front-panel Power LED Blink Codes .................................................................68
23. BIOS Error Messages ....................................................................................68
24. Safety Standards..........................................................................................69
25. EMC Regulations...........................................................................................75
26. Regulatory Compliance Marks.........................................................................78

9
1 Desktop Board Features
This chapter briefly describes the features of Intel®Desktop Board DH57DD. Table 1
summarizes the major features of the Desktop Board.
Table 1. Feature Summary
Form Factor microATX (243.84 millimeters [9.6 inches] x 243.84 millimeters
[9.6 inches])
Processor •Intel®Core™ i7, Intel®Core™ i5, Intel®Core™ i3, and
Intel®Pentium processors in an LGA1156 socket:
―Integrated graphics processing (processors with Intel®HD
Graphics)
―External graphics interface controller
―Integrated memory controller
Chipset Intel®H57 Express Chipset consisting of the Intel®H57 Express
Platform Controller Hub (PCH)
Memory •Four 240-pin DDR3 SDRAM Dual Inline Memory Module (DIMM)
sockets
•Dual Channel DDR3 1333 MHz and DDR3 1066 MHz support
•Support for 1 Gb and 2 Gb memory technology
•Support for up to 16 GB of system memory with four DIMMs using
2 Gb memory technology
•Support for non-ECC memory
Graphics •Integrated graphics support for processors with Intel HD Graphics:
―High-Definition Multi-media Interface* (HDMI*)
―DVI-I
•Discrete graphics support for a PCI Express* 2.0 x16 add-in
graphics card
Audio •10-channel (7.1+2) Intel®High Definition Audio (Intel®HD Audio)
using a Realtek* ALC889 audio codec including:
―Front panel audio header with support for Intel HD Audio and AC
’97 Audio
―Onboard S/PDIF out header and back panel S/PDIF out
connector
―Intel HD Audio Link header
•8-channel (7.1) Intel HD Audio via the HDMI port
Expansion
Capabilities
One PCI Express 2.0 x16 add-in card connector
Two PCI Express 2.0 x1 add-in card connectors
One PCI bus add-in card connector
continued

Intel Desktop Board DH57DD Product Guide
10
Table 1. Feature Summary (continued)
Peripheral
Interfaces
•Fourteen USB 2.0 ports:
―Six ports are implemented with stacked back panel connectors
―Eight front panel ports are implemented with four dual-port
internal headers
•Five internal Serial ATA (SATA) 3.0 Gb/s ports
•One external SATA (eSATA) 3.0 Gb/s port
Legacy I/O Support •Legacy I/O Controller that provides:
―Consumer Infrared (CIR) support
―One serial port via an onboard header
LAN Support Intel®82578DC Gigabit (10/100/1000 Mb/s) Ethernet LAN controller
including an RJ-45 back panel connector with integrated status LEDs
BIOS •Intel®BIOS resident in an SPI Flash device
•Support for Advanced Configuration and Power Interface (ACPI),
Plug and Play, and SMBIOS
Instantly Available
PC Technology
•Support for PCI Local Bus Specification Revision 2.3
•Support for PCI Express Base Specification Revision 2.0
•Suspend to RAM support
•Wake on PCI Express, LAN, front panel, serial, and USB ports
Hardware
Management
•Intel®Quiet System Technology (Intel®QST) implemented through
the Intel®Management Engine (Intel®ME) in the Intel H57 PCH
•Voltage sense to detect out of range power supply voltages
•Thermal sense to detect out of range thermal values
•Three fan headers using PWM control
•4-pin headers for processor and chassis fans
•4-wire and 3-wire (linear) fan speed control support for the
chassis fans
•Support for Platform Environmental Control Interface (PECI)

Desktop Board Features
11
Supported Operating Systems
The Desktop Board supports the following operating systems:
•Microsoft Windows* 7 Ultimate 64-bit edition
•Microsoft Windows 7 Ultimate 32-bit edition
•Microsoft Windows 7 Home Basic 64-bit edition
•Microsoft Windows 7 Home Premium 64-bit edition
•Microsoft Windows 7 Home Premium 32-bit edition
•Microsoft Windows 7 Home Basic 32-bit edition
•Microsoft Windows Vista* Ultimate 32-bit edition
•Microsoft Windows Vista Business 32-bit edition
•Microsoft Windows Vista Home Premium 32-bit edition
•Microsoft Windows Vista Home Basic 32-bit edition
•Microsoft Windows Vista Ultimate 64-bit edition
•Microsoft Windows Vista Business 64-bit edition
•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

Intel Desktop Board DH57DD Product Guide
12
Desktop Board Components
Figure 1 shows the approximate location of the major components on Intel Desktop
Board DH57DD.
Figure 1. Intel Desktop Board DH57DD Components

Desktop Board Features
13
Table 2. Intel Desktop Board DH57DD Components
Label Description
A PCI bus connector
B PCI Express 2.0 x1 add-in card connector
C IEEE 1394a header
D IEEE 1394a header
E PCI Express 2.0 x1 add-in card connector
F Battery
G PCI Express 2.0 x16 add-in card connector
H Back panel connectors
I 12 V processor core voltage connector (2 x 2 pin)
J Rear chassis fan header
K Processor socket
L Processor fan header
M DDR3 Channel A DIMM sockets
N DDR3 Channel B DIMM sockets
O Front chassis fan header
P Back panel CIR emitter (output) header
Q Front panel CIR receiver (input) header
R Chassis intrusion header
S Main power connector (2 x 12 pin)
T Speaker
U SATA connectors (5)
V Intel®Remote PC Assist Technology (Intel®RPAT) header
W Alternate front panel power LED header
X Front panel header
Y Front panel USB 2.0 header
Z Standby power indicator LED
AA Front panel USB 2.0 header
BB Front panel USB 2.0 header
CC Front panel USB 2.0 header
DD BIOS configuration jumper block
EE Intel HD Audio Link header
FF Serial port header
GG S/PDIF header
HH Front panel audio header

Intel Desktop Board DH57DD Product Guide
14
Online Support
For more information on Intel Desktop Board DH57DD consult the following online
resources:
•Intel Desktop Board DH57DD http://www.intel.com/products/motherboard/DH57DD
/index.htm
•Desktop Board Support http://www.intel.com/support/motherboards/desktop/
DH57DD
•Available configurations for Intel
Desktop Board DH57DD
http://www.intel.com/products/motherboard/DH57DD
/index.htm
•Supported processors http://processormatch.intel.com
•Chipset information http://www.intel.com/products/desktop/chipsets/inde
x.htm
•BIOS and driver updates http://downloadcenter.intel.com/
•Integration information http://www.intel.com/support/go/buildit
•Mini-ITX chassis compatibility http://www.intel.com/go/miniitx
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 DH57DD supports the Intel Core i7, Intel Core i5, Intel Core i3,
and Intel Pentium processors in an LGA1156 socket. Processors are not included with
the Desktop Board and must be purchased separately. The processor connects to the
Desktop Board through the LGA1156 socket.
For information on supported processors for Intel Desktop Board DH57DD, go to
http://processormatch.intel.com.

Desktop Board Features
15
Intel®H57 Express Chipset
The Intel H57 Express Chipset, consisting of the Intel H57 Platform Controller Hub
(PCH), provides interfaces to the processor and the USB, SATA, LPC, audio, network,
display, and PCI Express x1 interfaces. The Intel H57 PCH is a centralized controller
for the board’s I/O paths.
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 board has four DDR3 DIMM sockets and supports the following memory features:
•Two independent memory channels with interleaved mode support
•Support for non-ECC, unbuffered, single-sided or double-sided DIMMs with x8
organization and single-sided DIMMs with x16 organization
•16 GB maximum total system memory (with 2 Gb memory technology)
•Minimum total system memory: 512 MB using a 1 Gb x16 module
•Serial Presence Detect
•DDR3 1333 MHz and DDR3 1066 MHz SDRAM DIMMs
NOTE
32-bit operating systems are limited to a maximum of 4 GB of memory. These
operating systems will report less than 4 GB because of the memory used by
add-in graphics cards and other system resources.

Intel Desktop Board DH57DD Product Guide
16
Graphics Subsystem
The board supports system graphics through either Intel HD Graphics or a PCI Express
2.0 x16 add-in graphics card.
Integrated Graphics
The board supports integrated graphics through the Intel®Flexible Display Interface
(FDI) for processors with Intel HD Graphics.
Intel®HD Graphics
The Intel HD Graphics controller features the following:
•3D Features
⎯DirectX10* and OpenGL* 2.1 compliant
⎯Shader Model 4.0
•Video
⎯Hi-Definition content at up to 1080p resolution
⎯Hardware accelerated MPEG-2, VC-1/WMV, and H.264/AVC High-Definition
video formats
⎯Intel®Clear Video HD Technology with advanced video processing
•Dynamic Video Memory Technology (DVMT) 5.0 support including support of up to
1.7 GB Video Memory with a 4 GB and above system memory configuration
High-Definition Multimedia Interface* (HDMI*)
The HDMI port supports standard, enhanced, or high-definition video, plus multi-
channel digital audio on a single cable. It is compatible with all ATSC and DVB HDTV
standards and supports eight full range channels at 24-bit/96-kHz audio of lossless
audio formats such Dolby* TrueHD or DTS* HD Master Audio. The maximum
supported resolution is 1920 x 1200 at 60 Hz refresh (WUXGA). The HDMI port is
compliant with the HDMI 1.3 specification.
The HDMI port is enabled for the POST whenever a monitor is attached, regardless of
the DVI-I connector status.
Depending on the type of add-in card installed in the PCI Express x16 connector, the
HDMI port will behave as described in Table 3.
Table 3. HDMI Port Status Conditions
PCI Express x16 Connector Status HDMI Port Status
No add-in card installed Enabled
Non-video PCI Express x1 add-in card installed Enabled
PCI Express x4, x8, or x16 add-in card installed Disabled

Desktop Board Features
17
Digital Visual Interface (DVI-I)
The DVI-I port supports both digital and analog DVI displays. The maximum
supported resolution is 1900 x 1200 (WUXGA). The DVI port is compliant with the
DVI 1.0 specification. The DVI analog output can be converted to VGA using a DVI-
VGA converter.
Depending on the type of add-in card installed in the PCI Express x16 connector, the
DVI port will behave as described in Table 4.
Table 4. DVI Port Status Conditions
PCI Express x16 Connector Status
DVI Digital Port
Status
DVI Analog Port
Status(Note)
No add-in card installed Enabled Enabled
Non-video PCI Express x1 add-in card
installed
Enabled Enabled
PCI Express x16 add-in card installed Disabled Disabled
Note: DVI analog output can be converted to VGA with a DVI-VGA converter.
VGA Displays
The DVI-I port supports VGA displays when a DVI-I to VGA converter is used. The
maximum supported resolution is 2560 x 1600 (WQXGA).
The DVI-A port is enabled for the POST whenever a monitor is attached, regardless of
the HDMI connector status.
PCI Express* x16 Graphics
The Intel Core i7, Intel Core i5, Intel Core i3, and Intel Pentium processors in an
LGA1156 socket support discrete add-in graphics cards via the PCI Express 2.0 x16
add-in card connector. The board supports the following PCI Express speeds:
•PCI Express 2 frequency of 2.5 GHz which results in 5.0 Gb/s in each direction
(500 MB/s) per lane. The maximum theoretical bandwidth on the interface is
8 GB/s in each direction, simultaneously, when operating in x16 mode.
•PCI Express 1.1 frequency of 1.25 GHz resulting in 2.5 Gb/s each direction
(250 MB/s) per lane. The maximum theoretical bandwidth on the interface is
4 GB/s in each direction, simultaneously, when operating in x16 mode.

Intel Desktop Board DH57DD Product Guide
18
Audio Subsystem
The board supports Intel High Definition Audio through a Realtek ALC889 audio codec
as well as through the HDMI interface.
The Realtek ALC889-based audio subsystem provides the following features:
•Advanced jack sense for the back panel audio connectors that enables the audio
codec to recognize the device that is connected to an audio port
•Stereo input and output via back panel connectors
•Headphone and Mic in functions for front panel audio connectors
•108 dB Signal-to-Noise ratio (SNR) playback (DAC) quality and 104 dB SNR
recording (ADC) quality
•Content protection for full-rate loss-less DVD Audio and Blu-ray Disc* audio
content playback (with selected versions of media player software)
The audio subsystem supports the following audio interfaces:
•7.1 analog back panel audio connectors
•Optical S/PDIF-out back panel audio connector
•S/PDIF-out header with support for optical or coaxial S/PDIF output
•Front panel audio header with support for Intel HD Audio and AC ’97 Audio
•Intel HD Audio Link via an onboard header
Table 5 lists the supported functions of the front panel and back panel audio jacks.
Table 5. Audio Jack Retasking Support
Audio
Jack
Micro-
phone
Head-
phones
Front
Speakers Line In
Side
Surround
Rear
Surround
Center/
Sub
FPGreen Default
FP Pink Default
BP Blue Default
BP Green Control
panel
Default
BP Pink Default
BPBlack Default
BPOrange Default

Desktop Board Features
19
LAN Subsystem
The LAN subsystem includes:
•Intel 82578DC Gigabit (10/100/1000 Mb/s) Ethernet LAN controller
•RJ-45 LAN connector with integrated status LEDs
LAN software and drivers are available at http://downloadcenter.intel.com/.
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 as shown in Table 6.
Figure 2. LAN Connector LEDs
Table 6. LAN Connector LEDs
LED LED Color LED State Indicates
A (Link/Activity) Off LAN link is not established Green
On LAN link is established
Blinking LAN activity is occurring
N/A Off 10 Mb/s data rate
Green On 100 Mb/s data rate
B (Link Speed)
Yellow On 1000 Mb/s data rate
USB 2.0 Support
The board supports up to fourteen USB 2.0 ports provided by two EHCI host
controllers in the Intel H57 PCH that allow the use of EHCI-compatible drivers.
The port arrangement is as follows:
•Six ports via stacked back panel connectors
•Eight front panel ports via four dual-port onboard headers
USB 2.0 support requires both an operating system and drivers that fully support
USB 2.0 transfer rates.

Intel Desktop Board DH57DD Product Guide
20
SATA Support
The board provides five internal SATA connectors and one back panel eSATA connector
which support one storage device per connector.
Expandability
Intel Desktop Board DH57DD provides the following connectors for system expansion:
•One PCI Express 2.0 x16 connector
•Two PCI Express 2.0 x1 connectors
•One PCI bus connector
Legacy I/O
The board’s Legacy I/O Controller provides the following legacy features:
•Low pin count (LPC) interface
•One serial port header
•Consumer Infrared (CIR) support
•Serial IRQ interface compatible with serialized IRQ support for PCI Conventional
bus systems
•Intelligent power management, including a programmable wake-up event interface
The BIOS Setup program provides configuration options for the Legacy I/O controller.
BIOS
The BIOS provides the Power-On Self-Test (POST), the BIOS Setup program, and the
PCI Express and SATA auto-configuration utilities. The BIOS is stored in the Serial
Peripheral Interface (SPI) Flash device.
The BIOS can be updated by following the instructions in Chapter 3 starting on
page 63.
SATA Auto Configuration
If you install a SATA 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
SATA device. You can override the auto-configuration options by specifying manual
configuration in the BIOS Setup program.