MSI P4m900m3l Manual

MS-7255 Mainboard
2-6Important
1.Check the information in H/W Monitor in BIOS  (Chapter 3) for the CPU
temperature.
2. Whenever CPU is not installed, always protect your CPU socket pin with the
plastic cap covered (shown in Figure 1) to avoid damaging.
3. Please note that the mating/unmating durability of the CPU is 20 cycles.
Therefore we suggest you do not plug/unplug the CPU too often.10. Align the holes on the mainboard
with the heatsink. Push down the
cooler until its four clips get
wedged into the...

2-7 Hardware SetupMemory
The mainboard provides two 240-pin non-ECC DDRII DIMM slots.
For more information on compatible components, please visit http://www.msi.com.tw/
program/products/mainboard/mbd/pro_mbd_trp_list.php.64x2=128  pin56x2=112  pin DDRII
240-pin, 1.8VImportant
-DDRII modules are not interchangeable with DDR and the DDRII standard is
not backwards compatible. You should always install DDRII memory mod-
ules in the DDRII DIMM slots and DDR memory modules in the DDR DIMM
slots.
-In...

MS-7255 Mainboard
2-8Power Supply
PINSIGNAL
13+3.3V
14-12V
15GND
16PS-ON#
17GND
18GND
19GND
20Res
21+5V
22+5V
23+5V
24GNDPINSIGNAL
 1+3.3V
 2+3.3V
 3GND
 4+5V
 5GND
 6+5V
 7GND
 8PWR OK
 95VSB
10+12V
11+12V
12NC JPWR2 Pin DefinitionPINSIGNAL
1GND
2GND
312V
412V  JPWR1 Pin Definitionpin 12pin 13
JPWR1Important
1. Maker sure that all the connectors are connected to proper ATX power sup-
plies to ensure stable operation of the mainboard.
2. Power supply of 350 watts (and above) is highly recommended for...

2-9 Hardware SetupBack Panel Mouse/Keyboard Connector
The standard PS/2®
 mouse/keyboard DIN connector is for a PS/2®
 mouse/keyboard. Parallel Port Connector
A parallel port is a standard printer port that supports Enhanced Parallel Port (EPP)
and Extended Capabilities Parallel Port (ECP) mode. Serial Port Connector
The serial port is a 16550A high speed communications port that sends/ receives 16
bytes FIFOs. You can attach a serial mouse or other serial devices directly to the
connector. VGA...

MS-7255 Mainboard
2-10 Audio Port Connectors
These audio connectors are used for audio devices. You can differentiate the color
of the audio jacks for different audio sound effects.  Blue audio jack - Line In / Side-Surround Out  in 7.1 channel mode, is used
for external CD player, tapeplayer or other audio
devices.  Green audio jack - Line Out, is a connector for speakers or headphones.  Pink audio jack - Mic In, is a connector for microphones.  Black audio jack - Rear-Surround Out in 5.1/ 7.1 channel...

2-11 Hardware SetupConnectors
Floppy Disk Drive Connector: FDD1
This standard FDD connector supports 360K, 720K, 1.2M, 1.44M and 2.88M floppy
disk types.
FDD1IDE1 (Primary IDE Connector)
IDE1 can connect a Master and a Slave drive. You must
configure the second hard drive to Slave mode by setting
the jumper accordingly.
IDE2 (Secondary IDE Connector)
IDE2 can also connect a Master and a Slave drive. ATA133 Hard Disk Connectors: IDE1 & IDE2
The mainboard has a 32-bit Enhanced PCI IDE and Ultra DMA...

MS-7255 Mainboard
2-12PINSIGNALPINSIGNAL
1GND2RXN
3RXP4GND
5TXN6TXP
7GNDSATA1, SATA2 Pin DefinitionConnect to SATA1, 2Take out the dust cover
and connect to the hard
disk devices Serial ATA cableSerial ATA Connectors: SATA1, SATA2
SATA1, SATA2 are high-speed Serial ATA interface ports. Each supports 1st
 genera-
tion serial ATA data rates of 150MB/s and is fully compliant with Serial ATA 1.0
specifications. Each Serial ATA connector can connect to 1 hard disk device.
7
1
SATA1
SATA2
71Important
Please do...

2-13 Hardware Setup
Fan Power Connectors: CPUFAN1, PWRFAN1, SYSFAN1
The fan power connectors support system cooling fan with +12V. When connecting
the wire to the connectors, always take note that the red wire is the positive and
should be connected to the +12V, the black wire is Ground and should be connected
to GND. If the mainboard has a System Hardware Monitor chipset on-board, you must
use a specially designed fan with speed sensor to take advantage of the CPU fan
control.
CPUFAN1 SENSOR
+12V...

MS-7255 Mainboard
2-14 IEEE 1394 Connectors (optional): J1394_1
The mainboard provides IEEE1394 pinheaders that allow you to connect IEEE 1394
ports via an external IEEE1394 bracket (optional).
Pin Definition
PINSIGNALPINSIGNAL
1TPA+2TPA-
3Ground4Ground
5TPB+6TPB-
7Cable power8Cable power
9Key (no pin)10GroundFoolproof
design Connected to J1394_1IEEE1394 Bracket (Optional) J1394_1      1     2
   9   10CH2 Hardware Setup.p65  2006/9/15, 下午 02:1414 

2-15 Hardware SetupConnected to JSPDIFOUT1
SPDIF Bracket (Optional) SPDIF-Out Connector: JSPDIFOUT1
This connector is used to connect SPDIF (Sony & Philips Digital Interconnect Format)
interface for digital audio transmission.JSPDIFOUT1
VCC
SPDIFGNDSerial Port Connector: JCOM 2
The mainboard provides one 9-pin header as serial port JCOM 2. The port is a 16550A
high speed communication port that sends/receives 16 bytes FIFOs. You can attach
a serial mouse or other serial devices directly to it....