This publication, including all photographs, illustrations and software, is protected under
international copyright laws, with all rights reserved. Neither this manual, nor any of the
material contained herein, may be reproduced without written consent of the author.
Version 1.0
Disclaimer
The information in this document is subject to change without notice. The manufacturer
makes no representations or warranties with respect to the contents hereof and specifically
disclaims any implied warranties of merchantability or fitness for any particular purpose.
The manufacturer reserves the right to revise this publication and to make changes from
time to time in the content hereof without obligation of the manufacturer to notify any
person of such revision or changes.
Trademark Recognition
Microsoft, MS-DOS and Windows are registered trademarks of Microsoft Corp.
MMX, Pentium, Pentium-II, Pentium-III, Pentium-4, Celeron are registered trademarks of
Intel Corporation.
Other product names used in this manual are the properties of their respective owners and
are acknowledged.
Federal Communications Commission (FCC)
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 onto an outlet on a circuit different from that to which
the receiver is connected
•Consult the dealer or an experienced radio/TV technician for help
Shielded interconnect cables and a shielded AC power cable must be employed with this
equipment to ensure compliance with the pertinent RF emission limits governing this
device. Changes or modifications not expressly approved by the system’s manufacturer
could void the user’s authority to operate the equipment.
Preface
ii
Declaration of Conformity
This device complies with part 15 of the FCC rules. Operation is subject to the following
conditions:
•This device may not cause harmful interference, and
•This device must accept any interference received, including interference
that may cause undesired operation
Canadian Department of Communications
This class B digital apparatus meets all requirements of the Canadian Interference-causing
Equipment Regulations.
Cet appareil numérique de la classe B respecte toutes les exigences du Réglement sur le
matériel brouilieur du Canada.
About the Manual
The manual consists of the following:
Chapter 1
Introducing the Motherboard
Describes features of the motherboard.
Go to
H
page 1
Chapter 2
Installing the Motherboard
Chapter 3
Using BIOS
Chapter 4
Using the Motherboard Software
Chapter 5
VIA VT8237 SATA RAID
Setup Guide
Describes installation of motherboard
components.
Go to
Provides information on using the BIOS
Setup Utility.
Using VIA RAID Tool.............................................................................54
Multi-Language Translation
Chapter 1
Introducing the Motherboard
Introduction
Thank you for choosing the P4M900T-M motherboard. This motherboard is a high performance, enhanced function motherboard that supports the LGA775 socket Intel CoreTM 2
Duo/Pentium D/Pentium 4/Celeron D processors for high-end business or personal desktop
markets.
The motherboard incorporates the P4M900 Northbridge (NB) and VT8237A/VT8237S
Southbridge (SB) chipsets. The Northbridge supports a Front Side Bus (FSB) frequency of
1066/800/533 MHz FSB and Hyper-Threading technology. The memory controller supports DDR2 memory DIMM frequencies of 667/533/400. It supports two DDR2 Sockets
with up to maximum memory of 4 GB. Aside from the integrated UniChrome9 HC 3D/2D
Graphics & Video Controller, one PCI Express x 16 slot, intended for Graphics Interface
and fully compliant to the PCI Express Base Specification revision 1.1, provides users with
high-performance along with superior image and video quality.
The VT8237A/VT8237S Southbridge is a highly integrated peripheral controller, it includes
an integrated keyboard controller with PS2 mouse support, two-channel Serial ATA/RAID
hard disk controller, master mode enhanced Parallel IDE controller with full scatter/gather
capability and extension to UltraDMA-133/100/66 for 133/100/66 MB/sec transfer rate,
integrated USB 2.0 interface, supporting up to eight functional ports, and OnNow/ACPI
compliant advanced configuration and power management interface.
This motherboard is equipped with advanced full set of I/O ports in the rear panel, including
PS/2 mouse and keyboard connectors, COM1, LPT1, one VGA port, four USB ports, one
optional LAN port, one optional 1394a port and audio jacks for microphone, line-in and 6/
8-channel (optional) line-out.
1
Introducing the Motherboard
2
Feature
Processor
This motherboard uses an LGA775 type of Intel CoreTM 2 Duo/Pentium D/Pentium 4/
Celeron D that carries the following features:
•Accommodates Intel CoreTM 2 Duo/Pentium D/Pentium 4/Celeron D processors
•Supports a system bus (FSB) of 1066/800/533 MHz
•Supports “Hyper-Threading” technology CPU
“Hyper-Threading” technology enables the operating system into thinking it’s hooked
up to two processors, allowing two threads to be run in parallel, both on separate
“logical” processors within the same physical processor.
Chipset
The P4M900 Northbridge (NB) and VT8237A/VT8237S Southbridge (SB) chipsets are
based on an innovative and scalable architecture with proven reliability and performance.
P4M900
(NB)
VT8237A/
VT8237S
(SB)
•Supports 66 MHz, 4x and 8x transfer modes, Ultra V-Link Host
interface with 1 GB/s total bandwidth
•Supports up to two PCI Express ports, configured as one x16
and one x1 PCI Express lanes
•Integrated Chrome9 HC 3D/2D Graphics & Video Controller
•Advanced 64-bit DDR2/DDR SDRAM controller
• ACPI 2.0 and PCI Bus Power Management 1.1 complaint
•Supports 16-bit 66 MHz Ultra V-Link Host interface with total
bandwidth of 1 GB/s
•Compliant with PCI 2.3 specification at 33 MHz, supporting up
to 6 PCI masters
•Integrated Serial ATA/ Serial ATA II Host Controllers, supporting
data transfer rates up to 1.5/3.0 Gb/s (Serial ATA II with VT8237S
only)
17 WOL * Wake-On LAN connector
1 8 SPDIFO1 SPDIF out header
19 CD_IN1 Analog audio input header
20 AUDIO1 Front panel audio header
21 PCI1~2 32-bit add-on card slots
22 PCIEX1 PCI Express x1 Slot
23 PCIEX16 PCI Express x16 Slot
24 SYS_FAN System cooling fan connector
25 ATX_12V1 4-pin +12V power connector
5
* Stands for optional components
This concludes Chapter 1. The next chapter explains how to install the motherboard.
Introducing the Motherboard
6
Memo
Introducing the Motherboard
Chapter 2
Installing the Motherboard
Safety Precautions
•Follow these safety precautions when installing the motherboard
•Wear a grounding strap attached to a grounded device to avoid damage from
static electricity
•Discharge static electricity by touching the metal case of a safely grounded
object before working on the motherboard
•Leave components in the static-proof bags they came in
•Hold all circuit boards by the edges. Do not bend circuit boards
Choosing a Computer Case
There are many types of computer cases on the market. The motherboard complies with
the specifications for the Micro ATX system case. First, some features on the motherboard
are implemented by cabling connectors on the motherboard to indicators and switches on
the system case. Make sure that your case supports all the features required. Secondly, this
motherboard supports one or two floppy diskette drives and two enhanced IDE drives.
Make sure that your case has sufficient power and space for all drives that you intend to
install.
Most cases have a choice of I/O templates in the rear panel. Make sure that the I/O
template in the case matches the I/O ports installed on the rear edge of the motherboard.
This motherboard carries a Micro ATX form factor of 244 x 244 mm. Choose a case that
accommodates this form factor.
7
Installing the Motherboard in a Case
Refer to the following illustration and instructions for installing the motherboard in a case.
Most system cases have mounting brackets installed in the case, which correspond the holes
in the motherboard. Place the motherboard over the mounting brackets and secure the
motherboard onto the mounting brackets with screws.
Ensure that your case has an I/O template that supports the I/O ports and expansion slots
on your motherboard.
Installing the Motherboard
8
Do not over-tighten the screws as this can stress the motherboard.
Checking Jumper Settings
This section explains how to set jumpers for correct configuration of the motherboard.
Setting Jumpers
Use the motherboard jumpers to set system configuration options. Jumpers with more than
one pin are numbered. When setting the jumpers, ensure that the jumper caps are placed on
the correct pins.
The illustrations show a 2-pin jumper. When
the jumper cap is placed on both pins, the
jumper is SHORT. If you remove the jumper
cap, or place the jumper cap on just one pin,
the jumper is OPEN.
This illustration shows a 3-pin jumper. Pins
1 and 2 are SHORT
SHORT OPEN
Installing the Motherboard
Checking Jumper Settings
The following illustration shows the location of the motherboard jumpers. Pin 1 is labeled.
9
Jumper Settings
Jumper
CLR_CMOS 3-pin
BIOS_WP
To avoid the system unstability after clearing CMOS, we recommend
users to enter the main BIOS setting page to “Load Optimal Defaults” and then “Save Changes and Exit”.
Type
2-pin
Description
Clear CMOS
BIOS PROTECT
Installing the Motherboard
Setting (default)
1-2: NORMAL
2-3: CLEAR
Before clearing the
CMOS, make sure to
turn off the system.
OPEN: Flash Write
Enable
SHORT: Flash Write
Disable
1
CLR_CMOS
1
BIOS_WP
10
Connecting Case Components
After you have installed the motherboard into a case, you can begin connecting the motherboard components. Refer to the following:
1Connect the CPU cooling fan cable to CPU_FAN.
2Connect the system cooling fan connector to SYS_FAN.
3Connect the power cooling fan connector to PWR_FAN.
4Connect the case switches and indicator LEDs to the PANEL1.
5Connect the standard power supply connector to ATX1.
6Connect the auxiliary case power supply connector to ATX_12V1.
Connecting 20/24-pin power cable
Users please note that the 20-pin and 24-pin power cables can both be connected to the ATX1 connector. With the 20-pin power cable, just align the 20pin power cable with the pin 1 of the ATX1 connector. However, using 20-pin
power cable may cause the system to become unbootable or unstable because of
insufficient electricity. A minimum power of 300W is recommended for a fullyconfigured system.
With ATX v1.x power supply, users please
note that when installing 20-pin power cable,
the latche of power cable clings to the left
20-pin power cable
24-pin power cable
side of the ATX1 connector latch, just as the
picture shows.
With ATX v2.x power supply, users please
note that when installing 24-pin power cable,
the latches of power cable clings to the right
side of the ATX1 connector latch.
Installing the Motherboard
CPU_FAN/SYS_FAN/ PWR_FAN (Optional): Cooling FAN Power Connectors
PinSignal NameFunction
1GNDSystem Ground
2+12VPower +12V
3 Sense Sensor
4 PWM CPU FAN control
Users please note that the fan connector supports the CPU cooling
fan of 1.1A~2.2A (26.4W max.) at +12V.
ATX_12V1: ATX 12V Power Connector
PinSignal Name
1Ground
2Ground
3+12V
4+12V
ATX1: ATX 24-pin Power Connector
Pin Signal NamePin Signal Name
1+3.3V13+3.3V
2+3.3V14-12V
3Ground15Ground
4+5V16PS_ON
5Ground17Ground
6+5V18Ground
7Ground19Ground
8PWRGD20-5V
9+5VSB21+5V
10+12V22+5V
11 +12V 23+5V
12 +3.3V 24Ground
11
Installing the Motherboard
12
Front Panel Header
The front panel header (PANEL1) provides a standard set of switch and LED headers
commonly found on ATX or micro-ATX cases. Refer to the table below for information:
PinSignalFunctionPinSignalFunction
1 HD_LED_P Hard disk LED(+)
3 HD_LED_N Hard disk LED(-)
5 RST_SW_N Reset Switch(-)
7 RST_SW_P Reset Switch(+)
9 RSVDReserved
* MSG LED (dual color or single color)
Hard Drive Activity LED
Connecting pins 1 and 3 to a front panel mounted LED provides visual indication that data
is being read from or written to the hard drive. For the LED to function properly, an IDE
drive should be connected to the onboard IDE interface. The LED will also show activity
for devices connected to the SCSI (hard drive activity LED) connector.
2 FP PWR/SLP *MSG LED(+)
4 FP PWR/SLP *MSG LED(-)
6 PWR_SW_P Power Switch(+)
8 PWR_SW_N Power Switch(-)
10 KeyNo pin
Power/Sleep/Message waiting LED
Connecting pins 2 and 4 to a single or dual-color, front panel mounted LED provides power
on/off, sleep, and message waiting indication.
Reset Switch
Supporting the reset function requires connecting pin 5 and 7 to a momentary-contact
switch that is normally open. When the switch is closed, the board resets and runs POST.
Power Switch
Supporting the power on/off function requires connecting pins 6 and 8 to a momentarycontact switch that is normally open. The switch should maintain contact for at least 50 ms
to signal the power supply to switch on or off. The time requirement is due to internal debounce circuitry. After receiving a power on/off signal, at least two seconds elapses before
the power supply recognizes another on/off signal.
Installing the Motherboard
Installing Hardware
Installing the Processor
Caution: When installing a CPU heatsink and cooling fan make sure that
you DO NOT scratch the motherboard or any of the surface-mount
resistors with the clip of the cooling fan. If the clip of the cooling fan
scrapes across the motherboard, you may cause serious damage to the
motherboard or its components.
On most motherboards, there are small surface-mount resistors near the
processor socket, which may be damaged if the cooling fan is carelessly
installed.
Avoid using cooling fans with sharp edges on the fan casing and the clips.
Also, install the cooling fan in a well-lit work area so that you can clearly
see the motherboard and processor socket.
Before installing the Processor
This motherboard automatically determines the CPU clock frequency and system bus
frequency for the processor. You may be able to change these settings by making changes
to jumpers on the motherboard, or changing the settings in the system Setup Utility. We
strongly recommend that you do not over-clock processors or other components to run
faster than their rated speed.
Warning: Over-clocking components can adversely affect the reliability
of the system and introduce errors into your system. Over-clocking can
permanently damage the motherboard by generating excess heat in
components that are run beyond the rated limits.
13
This motherboard has an LGA775 socket. When choosing a processor, consider the
performance requirements of the system. Performance is based on the processor design, the
clock speed and system bus frequency of the processor, and the quantity of internal cache
memory and external cache memory.
Installing the Motherboard
14
CPU Installation Procedure
The following illustration shows CPU installation components.
A. Read and follow the instructions shown on the
sticker on the CPU cap.
B. Unload the cap
· Use thumb & forefinger to hold the
lifting tab of the cap.
· Lift the cap up and remove the cap
completely from the socket.
C. Open the load plate
· Use thumb & forefinger to hold the
hook of the lever, pushing down and pulling
aside unlock it.
· Lift up the lever.
· Use thumb to open the load plate. Be
careful not to touch the contacts.
D. Install the CPU on the socket
· Orientate CPU package to the socket.
Make sure you match triangle marker
to pin 1 location.
E. Close the load plate
· Slightly push down the load plate onto the
tongue side, and hook the lever.
· CPU is locked completely.
F. Apply thermal grease on top of the CPU.
G. Fasten the cooling fan supporting base onto
the CPU socket on the motherboard.
H. Make sure the CPU fan is plugged to the
CPU fan connector. Please refer to the CPU
cooling fan user’s manual for more detail
installation procedure.
To achieve better airflow rates and heat dissipation, we suggest that you
1.
use a high quality fan with 3800 rpm at least. CPU fan and heatsink
installation procedures may vary with the type of CPU fan/heatsink supplied. The form and size of fan/heatsink may also vary.
2.
DO NOT remove the CPU cap from the socket before installing a CPU.
Return Material Authorization (RMA) requests will be accepted only if the
3.
motherboard comes with the cap on the LGA775 socket.
Installing the Motherboard
Installing Memory Modules
This motherboard accommodates four memory modules. It can support two 240-pin
DDR2 667/533/400. The total memory support capacity is 4 GB.
You must install at least one module in any of the two slots. Each module can be installed
with 2 GB of memory; total support memory capacity is 4 GB.
Do not remove any memory module from its antistatic packaging until you
are ready to install it on the motherboard. Handle the modules only by
their edges. Do not touch the components or metal parts. Always wear a
grounding strap when you handle the modules.
Installation Procedure
Refer to the following to install the memory modules.
1This motherboard supports unbuffered DDR2 SDRAM .
2Push the latches on each side of the DIMM slot down.
3Align the memory module with the slot. The DIMM slots are keyed with
notches and the DIMMs are keyed with cutouts so that they can only be
installed correctly.
4Check that the cutouts on the DIMM module edge connector match the notches
in the DIMM slot.
5Install the DIMM module into the slot and press it firmly down until it seats
correctly. The slot latches are levered upwards and latch on to the edges of
the DIMM.
The following DDR2 memory modules have been tested and qualified for use with this
motherboard.
Typ e Size Vendor Module Name
DDR2 400
DDR2 533
DDR2 667
256 MB
512 MB
256 MB
512 MB
1 GB
256 MB
512 MB
1 GB
Hynix HYMP532U646-E3 AA
NANYA NT256T64UH4A0F-5A
SAMSUNG M378T3253FG0-CCC
Nanya NT512T64U88A0F-5A CL3
A-DATA M2OHY2F3G3110A1B0Z
Elixir M2U25664TUH4A0F-37B
Infineon HYS64T32400HU-3.7-A
Kingston KVR533D2N4
Ramaxel RML 1040M28D5F-533
AENEON AET660UD00-370A98U
Infineon HYS64T64400HU-3.7-A
Kingston KVR533D2N4/512
SAMSUNG M378T6553BGO-CD5
Apacer ELPIDA E5108AB-5C-E
KINGSTON KVR533D2N4/1G
Infineon HYS64T32400HU-3S-A
A-DATA M2OAD5Q3H3163J1C52
CORSAIR CM2X512-5400C4PRO
Infineon HYS64T64400HU-3S-A
KINGMAX KLCC28F-A8MF5
KINGSTON KVR667D2N5/512
NANYA NT512T64U88A0BY-3C
Transcend K4T51083QC
TwinMOS 8G-25JK5-EBT
TwinMOS 8D23JK-TT
Infineon HYS64T128920HU-3S-A
KINGSTON KVR667D2N5/1G
PQI MEAD-403LA1001-05B1
Installing the Motherboard
Installing a Hard Disk Drive/CD-ROM/SATA Hard Drive
This section describes how to install IDE devices such as a hard disk drive and a CD-ROM
drive.
About IDE Devices
Your motherboard has two IDE channels interface. An IDE ribbon cable supporting two IDE
devices is bundled with the motherboard.
You must orient the cable connector so that the pin1 (color) edge of the
cable corresponds to the pin 1 of the I/O port connector.
IDE1: IDE Connector
This motherboard supports two high data transfer SATA ports with each runs up to 1.5 Gb/
s. To get better system performance, we recommend users connect the CD-ROM to the IDE
channel, and set up the hard dives on the SATA ports.
17
IDE2: Secondary IDE Connector
The second drive on this controller must be set to slave mode. The configuration is the
same as IDE1.
IDE devices enclose jumpers or switches used to set the IDE device as MASTER or SLAVE.
Refer to the IDE device user’s manual. Installing two IDE devices on one cable, ensure that
one device is set to MASTER and the other device is set to SLAVE. The documentation of
your IDE device explains how to do this.
Installing the Motherboard
18
About SATA Connectors
Your motherboard features two SATA connectors supporting a total of two drives. SATA , or
Serial ATA (Advanced Technology Attachment) is the standard interface for the IDE hard
drives which are currently used in most PCs. These connectors are well designed and will
only fit in one orientation. Locate the SATA connectors on the motherboard and follow the
illustration below to install the SATA hard drives.
Installing Serial ATA Hard Drives
To install the Serial ATA (SATA) hard drives, use the SATA cable that supports the Serial
ATA protocol. This SATA cable comes with an SATA power cable. You can connect either
end of the SATA cable to the SATA hard drive or the connector on the motherboard.
SATA cable (optional)
Refer to the illustration below for proper installation:
1Attach either cable end to the connector on the motherboard.
2Attach the other cable end to the SATA hard drive.
3Attach the SATA power cable to the SATA hard drive and connect the other
end to the power supply.
This motherboard does not support the “Hot-Plug” function.
SATA power cable (optional)
Installing the Motherboard
Installing a Floppy Diskette Drive
The motherboard has a floppy diskette drive (FDD) interface and ships with a diskette drive
ribbon cable that supports one or two floppy diskette drives. You can install a 5.25-inch
drive and a 3.5-inch drive with various capacities. The floppy diskette drive cable has one
type of connector for a 5.25-inch drive and another type of connector for a 3.5-inch drive.
You must orient the cable connector so that the pin 1 (color) edge of the
cable corresponds to the pin 1 of the I/O port connector.
FDD: Floppy Disk Connector
This connector supports the provided floppy drive ribbon cable. After connecting the single
end to the onboard floppy connector, connect the remaining plugs on the other end to the
floppy drives correspondingly.
19
Installing the Motherboard
20
Installing Add-on Cards
The slots on this motherboard are designed to hold expansion cards and connect them to the
system bus. Expansion slots are a means of adding or enhancing the motherboard’s features
and capabilities. With these efficient facilities, you can increase the motherboard’s capabilities by adding hardware that performs tasks that are not part of the basic system.
PCIEX16 Slot
PCIEX1 Slot
PCI1~2
Slots
The PCI Express x16 slot is used to install an external PCI Express graphics card that is fully compliant to the PCI Express Base Specification
revision 1.1.
The PCI Express x1 slot is fully compliant to the PCI Express Base Specification revision 1.1.
This motherboard is equipped with two standard PCI slots. PCI stands for
Peripheral Component Interconnect and is a bus standard for expansion
cards, which for the most part, is a supplement of the older ISA bus standard.
The PCI slots on this board are PCI v2.3 compliant.
Before installing an add-on card, check the documentation for the card
carefully. If the card is not Plug and Play, you may have to manually
configure the card before installation.
Installing the Motherboard
Follow these instructions to install an add-on card:
1Remove a blanking plate from the system case corresponding to the slot you
are going to use.
2Install the edge connector of the add-on card into the expansion slot. Ensure
that the edge connector is correctly seated in the slot.
3Secure the metal bracket of the card to the system case with a screw.
For some add-on cards, for example graphics adapters and network adapters,
you have to install drivers and software before you can begin using the add-on
card.
21
Installing the Motherboard
22
Connecting Optional Devices
Refer to the following for information on connecting the motherboard’s optional devices:
AUDIO1: Front Panel Audio header
This header allows the user to install auxiliary front-oriented microphone and line-out ports
for easier access.
Pin Signal Name Function
1 AUD_MICFront Panel Microphone input signal
2 AUD_GNDGround used by Analog Audio Circuits
3 AUD_MIC_BIAS Microphone Power
4 AUD_VCCFiltered+5V used by Analog Audio Circuits
5 AUD_F_RRight Channel Audio signal to Front Panel
6AUD_RET_ RRight Channel Audio signal to Rear Panel
7REVDReserved
8 KeyNo Pin
9AUD_F_L Left Channel Audio signal to Front Panel
10AUD_RET_ L Left Channel Audio signal to Rear Panel
PinSignal Name
PinSignal NameFunction
1PORT 1L2AUD_GND
3PORT 1R4PRESENCE#
5PORT 2R6SENSE1_RETURN
7SENSE_SEND8KEY
9PORT 2L10SENSE2_RETURN
PinSignal Name
Installing the Motherboard
USB3~4: Front Panel USB headers
The motherboard has four USB ports installed on the rear edge I/O port array. Additionally,
some computer cases have USB ports at the front of the case. If you have this kind of case,
use auxiliary USB connector to connect the front-mounted ports to the motherboard.
PinSignal NameFunction
1USBPWRFront Panel USB Power
2USBPWRFront Panel USB Power
3USB_FP_P0-USB Port 0 Negative Signal
4USB_FP_P1-USB Port 1 Negative Signal
5USB_FP_P0+USB Port 0 Positive Signal
6USB_FP_P1+USB Port 1 Positive Signal
7GNDGround
8GNDGround
9KeyNo pin
10USB_FP_OC0Overcurrent signal
COM2: Onboard serial port header (Optional)
Connect a serial port extension bracket to this header to add a second serial port to your
system.
PinSignal NameFunction
1NDCDBData carry detect
2NSINBSerial Data In
3NSOUTBSerial Date Out
4NDTRBData terminal ready
5GNDGround
6NDSRBDate set ready
7NRTSBRequest to send
8NCTSBClear to send
9NRIBRing Indicator
10KeyNo pin
CD_IN: Analog audio input connector
PinSignal NameFunction
1CD_LLeft CD-in signal
2GNDGround
3GNDGround
4CD_RRight CD-in signal
23
SPDIFO1: SPDIF out header
This is an optional header that provides an S/PDIF (Sony/Philips Digital Interface) output
to digital multimedia device through optical fiber or coaxial connector.
Pin Signal Name Function
1SPDIF SPDIF digital output
2+5VA 5V analog Power
3Key No pin
4GND Ground
Installing the Motherboard
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