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 holes of the
mainboard.
12.Turn over the mainboard to con-
firm that the clip-ends are cor-
rectly inserted. 11.Press the four hooks down to fas-
ten the cooler. Then rotate the lock-
ing switch (refer to the correct di-
rection marked on it) to lock the
hooks.9.Press down the load lever lightly
onto the load plate, and then se-
cure the lever with the hook under
retention tab.locking
switchCH2 Hardware Setup.p65  2006/9/15, 下午 02:146 
						

							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 dual-channel mode, make sure that you install memory modules of the
same type and density in differentchannel DDR DIMM slots.
-To enable successful system boot-up, always insert the memory modules
into the DIMM1 first. Installing DDRII Modules
1. The memory module has only one notch on the center and will only fit in the right
orientation.
2. Insert the memory module vertically into the DIMM slot. Then push it in until the
golden finger on the memory module is deeply inserted in the DIMM slot.
 3. The plastic clip at each side of the DIMM slot will automatically close.VoltNotchImportant
You can barely see the golden finger if the module is properly inserted in the
DIMM slot.CH2 Hardware Setup.p65  2006/9/15, 下午 02:147 
						

							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 system
stability.
3. ATX 12V power connection should be greater than 18A. ATX 24-Pin Power Connector: JPWR2
This connector allows you to connect an ATX 24-pin power supply.
To connect the ATX 24-pin power supply, make sure the plug of the
power supply is inserted in the proper orientation and the pins are
aligned. Then push down the power supply firmly into the connector.
You may use the 20-pin ATX power supply as you like. If you’d like
to use the 20-pin ATX power supply, please plug your power sup-
ply along with pin 1 & pin 13 (refer to the image at the right hand).
There is also a foolproof design on pin 11, 12, 23 & 24 to avoid
wrong installation.
ATX 12V Power Connector: JPWR1
This 12V power connector is used to provide power to the CPU.
3
4 2 1 JPWR2
12
1 2413CH2 Hardware Setup.p65  2006/9/15, 下午 02:148 
						

							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 Connector
The DB15-pin female connector is provided for VGA monitors. IEEE 1394 Port
The 1394 port on the back panel provides connection to 1394 devices. USB Connectors
The OHCI (Open Host Controller Interface) Universal Serial Bus root is for attaching
USB devices such as keyboard, mouse, or other USB-compatible devices. LAN (RJ-45) Jack
The standard RJ-45 jack is for connection
to single Local Area Network (LAN). You
can connect a network cable to it.Link Indicator Activity IndicatorLEDColorLED StateCondition
OffLAN link is not established.
LeftOrangeOn (steady state)LAN link is established.
On (brighter & pulsing)The computer is communicating with another computer on the LAN.
GreenOff10 Mbit/sec data rate is selected.
RightOn100 Mbit/sec data rate is selected.
OrangeOn1000 Mbit/sec data rate is selected.KeyboardUSB PortsL-In
MouseParallel
1394 PortLAN
VGA Port Serial PortCS-OutRS-Out
SS-Out L-Out
MicCH2 Hardware Setup.p65  2006/9/15, 下午 02:149 
						

							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 mode.  Orange audio jack - Center/ Subwoofer Out in 5.1/ 7.1 channel mode.  Gray audio jack - If there is a gray audio jack on the back panel in your
mainboard, the Gray audio jack is for Rear-Surround
Out and the Black audio jack will be used as the Side-
Surround Out.CH2 Hardware Setup.p65  2006/9/15, 下午 02:1410 
						

							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 66/100/133 controller
that provides PIO mode 0~4, Bus Master, and Ultra DMA 66/100/133 function. You can
connect hard disk drives, CD-ROM and other IDE devices.
The Ultra ATA133 interface boosts data transfer rates between the computer and the
hard drive up to 133 megabytes (MB) per second. The new interface is one-third
faster than earlier record-breaking Ultra ATA/100 technology and is backwards
compatible with the existing Ultra ATA interface.Important
If you install two hard disks on cable, you must configure the second drive to
Slave mode by setting its jumper. Refer to the hard disk documentation
supplied by hard disk vendors for jumper setting instructions.IDE2 IDE1CH2 Hardware Setup.p65  2006/9/15, 下午 02:1411 
						

							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 not fold the Serial ATA cable into 90-degree angle. Otherwise,
data loss may occur during transmission.CH2 Hardware Setup.p65  2006/9/15, 下午 02:1412 
						

							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
GNDCONTROLImportant
1.Please refer to the recommended CPU fans at Intel® 
 official website or
consult the vendors for proper CPU cooling fan.
2.CPUFAN1 supports fan control. You can install Core Center utility (refer to
Appendix for details) that will automatically control the CPU fan speed
according to the actual CPU temperature.
Chassis Intrusion Switch Connector: JCASE1
This connector connects to a 2-pin chassis switch. If the chassis is opened, the
switch will be short. The system will record this status and show a warning mes-
sage on the screen. To clear the warning, you must enter the BIOS utility and clear the
record.JCASE11
2 CINTRU
GNDSYSFAN1 SENSOR
+12VGND
PWRFAN1 SENSOR
+12VGNDCH2 Hardware Setup.p65  2006/9/15, 下午 02:1413 
						

							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.
PINSIGNALDESCRIPTION
  1DCDData Carry Detect
  2SINSerial In or Receive Data
  3SOUTSerial Out or Transmit Data
  4DTRData Terminal Ready
  5GNDGround
  6DSRData Set Ready
  7RTSRequest To Send
  8CTSClear To Send
  9RIRing IndicatePin Definition
JCOM2
192CH2 Hardware Setup.p65  2006/9/15, 下午 02:1415