MSI P4m900m3l Manual

							MS-7255 Mainboard
1-2Processor Support*
- Supports Intel®
 Pemtium 4 Extreme Edition, Pentium 4, Pentium
D (805/820), Pentium D (920/925/930), Celeron D and Intel®
CoreTM
 2 Duo processors in the LGA775 package.
- Supports 3/4 pin CPU Fan Pin-Header with Fan Speed Control.
- Supports EIST Technology
- Supports Hyper-Threading (HT) Technology
- Supports Intel Dual Core Technology
We recommend use processor with 95w power consumption (805/
820/920/925/930)
Supported FSB
- 533/800/1066 MHz
Chipset
- North Bridge: VIA®
 P4M890/P4M900
- South Bridge: VIA®
 8237A
Memory Support**
- DDRII 400/533 SDRAM (2GB Max)
- 2 DDRII DIMMs (240pin / 1.8V)
LAN
- Supports LAN 10/100 Fast Ethermet by VIA®
  VT6103L
- Supports LAN 10/100/1000 Fast Ethermet by VIA®
  VT6122(optional)
IEEE 1394 (Optional)
- Chip integrated by VIA VT 6307 or VT6308
Audio
- Chip integrated by VIA® 
 VT1708
- Flexible 8-channel audio with jack sensing
- Compliant with Azalia 1.x HD audio.
IDE
- 2 ports (4 IDE channels).
- Supports Ultra DMA 33/66/100/133 mode
- Supports PIO, Bus Master operation mode
SATA
- 2 SATA ports
- Supports 2 SATA devices.
- Supports storage and data transfers at up to 150 MB/s
Floppy
- 1 floppy port
- Supports 1 FDD with 360K, 720K, 1.2M, 1.44M and 2.88MbytesMainboard SpecificationsCH1 Getting Started.p65  2006/9/15, 下午 02:132 
						

							1-3 Getting Started
Connectors
Back Panel
- 1 PS/2 mouse port
- 1 PS/2 keyboard port
- 1 serial port (COM1)
- 1 parallel port supporting SPP/EPP/ECP mode
- 1 D-Sub VGA port
- 1 IEEE 1394 port (Optional)
- 4 USB 2.0 ports
- 1 LAN jack
- 6 flexible audio jacks.
On-Board Pinheaders
- 1 front Audio pinheader
- 1 CD-in pinheader
- 1 SPDIF-out pinheader
- 1 IEEE 1394 pinheader (Optional)
- 2 USB 2.0 pinheaders
- 1 serial port pinheader (JCOM2)
Slots
- 1 PCI Express x16 slot
- 1 PCI Express x1 slot
- 2 PCI slots.
- Support 3.3V/ 5V PCI bus Interface
Form Factor
- Micro-ATX (24.4cm X 21.0cm)
Mounting
- 6 mounting holes*   For the latest information about CPU, please visit http://www.msi.
com.tw/program/products/mainboard/mbd/pro_mbd_cpu_support.
php
**  For the updated supporting memory modules, please visit http://
www.msi.com.tw/program/products/mainboard/mbd/
pro_mbd_trp_list.phpCH1 Getting Started.p65  2006/9/15, 下午 02:133 
						

							MS-7255 Mainboard
1-4MS-7255 v1.X/v2.X M-ATX MainboardMainboard LayoutPCI 2JPWR2JPWR1
PCI 1PCI E_2 PCIE_1BATT+IDE 1IDE 2
FDD 1
JCOM2VIAVT8237AVIAP4M890/ P4M900
DIMM1
DIMM2BIOSJUSB1
J1394_1JUSB2SATA1 SATA2JCD1JAUD1JSPDIFOUT1VIA
VT6307
/ VT6308
VT1708Winbond
W83627EHGJFP2JFP1
SYSFAN1PWRFAN1CPUFAN1
JBAT1
JCASE1Top : mouse 
Bottom:
keyboard
Top : 
Parallel Port
Bottom: 
COM portA
VGA port
Top: LAN Jack
Bottom: USB ports  Top:1394
Bottom: USB ports T:
M:
B:Line-In
Line-Out
Mic
T:RS-Out
M:CS-Out
B:SS-OutVIA
 VT6103LCH1 Getting Started.p65  2006/9/15, 下午 02:134 
						

							1-5 Getting StartedPacking ChecklistPower CableSATA Cable (Optional)
MSI motherboardMSI Driver/Utility CD
* The pictures are for reference only. Your packing contents may vary depending on
the model you purchased.Back IO ShieldStandard Cable for
IDE DevicesUser’s GuideCH1 Getting Started.p65  2006/9/15, 下午 02:135 
						

							MS-7255 Mainboard
1-6The PC AlertTM
 4 is a utility you can find in the CD-ROM disk. The utility is  just like
your PC doctor that can detect the following PC hardware status during real time
operation:
ö  monitor CPU & system temperatures
ö  monitor fan speeds
ö  monitor system voltages
If one of the items above is abnormal, the program main screen will be immedi-
ately shown on the screen, with the abnormal item highlighted in red.  This will
continue to be shown until the condition returns to the normal status.Users can use the Adjusting Keys to change the minimum and maximum threshold
of each item for the system to send out a warning message. Click Temperature to
select the temperature modes of either Fahr-
enheit (o
F) or Celsius (o
C).  The PC Alert™ 4
icon on the Status Area will show the current
CPU temperature.Temperature
ModesAdjusting KeysPC AlertTM
 4Important
1. Items shown on PC Alert 4 vary depending on your system status.
2. Whenever the minimum or maximum threshold of each item has been changed,
please close the PC Alert 4 program for the new settings to take effect.CH1 Getting Started.p65  2006/9/15, 下午 02:136 
						

							MS-7255 Mainboard
2-2Quick Components GuideCH2 Hardware Setup.p65  2006/9/15, 下午 02:142 
						

							2-3 Hardware SetupCPU (Central Processing Unit)
This mainboard supports Intel®
 Pentium 4 processor in LGA 775 package.  When you
are installing the CPU, make sure to install the cooler to prevent overheating.
If you do not have the CPU cooler, contact your dealer to purchase and install them
before turning on the computer.
For the latest information about CPU, please visit http://www.msi.com.tw/program/
products/mainboard/mbd/pro_mbd_cpu_support.php.Important
1. Overheating will seriously damage the CPU and system. Always make
sure the cooling fan can work properly to protect the CPU from overheating.
2. Make sure that you apply an even layer of heat sink paste (or thermal tape)
between the CPU and the heatsink to enhance heat dissipation.
3. While replacing the CPU, always turn off the ATX power supply or unplug
the power supply’s power cord from the grounded outlet first to ensure the
safety of CPU.Introduction to LGA 775 CPU
The surface of LGA 775 CPU.
Remember to apply some silicone
heat transfer compound on it for
better heat dispersion.
Yellow triangle is the Pin 1 indicatorThe pin-pad side of LGA 775
CPU.Yellow triangle is the Pin 1 indicatorAlignment  KeyAlignment  KeyCH2 Hardware Setup.p65  2006/9/15, 下午 02:143 
						

							MS-7255 Mainboard
2-42.Remove the cap from lever hinge
side (as the arrow shows). 1.The CPU has a plastic cap on it to
protect the contact from damage.
Before you install the CPU, always
cover it to protect the socket pin.
3.The pins of socket reveal. CPU & Cooler Installation
When you are installing the CPU, make sure the CPU has a cooler at-
tached on the top to prevent overheating. If you do not have the cooler, contact
your dealer to purchase and install them before turning on the computer. Meanwhile,
do not forget to apply some silicon heat transfer compound on CPU before installing
the heat sink/cooler fan for better heat dispersion.
Follow the steps below to install the CPU & cooler correctly. Wrong installation
will cause the damage of your CPU & mainboard.4.Open the load lever.CH2 Hardware Setup.p65  2006/9/15, 下午 02:144 
						

							2-5 Hardware SetupImportant
1.Confirm if your CPU cooler is firmly installed before turning on your system.
2. Do not touch the CPU socket pins to avoid damaging.
3. The availability of the CPU land side cover depends on your CPU packing.
6.After confirming the CPU direction
for correct mating, put down the
CPU in the socket housing frame.
Be sure to grasp on the edge of
the CPU base. Note that the align-
ment  keys are matched.
8.Cover the load plate onto the
package.7.Visually inspect if the CPU is
seated well into the socket. If not,
take out the CPU with pure vertical
motion and reinstall.alignment
key 5.Lift the load lever up and open the
load plate.CH2 Hardware Setup.p65  2006/9/15, 下午 02:145