MSI MS-7255 User Manual
MS-7255
MS-7255 (v1.X/v2.X) Mainboard
G52-72551X6
i
Copyright Notice
The material in this document is the intellectual property of MICRO-STAR
INTERNATIONAL. We take every care in the preparation of this document, but no
guarantee is given as to the correctness of its contents. Our products are under
continual improvement and we reserve the right to make changes without notice.
Trademarks
All trademarks are the properties of their respective owners.
NVIDIA, the NVIDIA logo, DualNet, and nForce are registered trademarks or trade-
marks of NVIDIA Corporation in the United States and/or other countries.
AMD, Athlon™ , Athlon™ XP, Thoroughbred™, and Duron™ are registered trade-
marks of AMD Corporation.
Intel® and Pentium® are registered trademarks of Intel Corporation.
PS/2 and OS®/2 are registered trademarks of International Business Machines
Corporation.
Windows® 95/98/2000/NT/XP are registered trademarks of Microsoft Corporation.
Netware® is a registered trademark of Novell, Inc.
Award® is a registered trademark of Phoenix Technologies Ltd.
AMI® is a registered trademark of American Megatrends Inc.
Revision History
Revision Revision History Date
V1.0 First release July 2006
V1.1 Include P4M900M Cover September 2006
Technical Support
If a problem arises with your system and no solution can be obtained from the user’s
manual, please contact your place of purchase or local distributor. Alternatively,
please try the following help resources for further guidance.
Visit the MSI website for FAQ, technical guide, BIOS updates, driver updates,
and other information: http://www.msi.com.tw/program/service/faq/
faq/esc_faq_list.php
Contact our technical staff at: http://support.msi.com.tw/
ii
Safety Instructions
1. Always read the safety instructions carefully.
2. Keep this User’s Manual for future reference.
3. Keep this equipment away from humidity.
4. Lay this equipment on a reliable flat surface before setting it up.
5. The openings on the enclosure are for air convection hence protects the equipment from overheating. DO NOT COVER THE OPENINGS.
6. Make sure the voltage of the power source and adjust properly 110/220V before connecting the equipment to the power inlet.
7. Place the power cord such a way that people can not step on it. Do not place
anything over the power cord.
8. Always Unplug the Power Cord before inserting any add-on card or module.
9. All cautions and warnings on the equipment should be noted.
10. Never pour any liquid into the opening that could damage or cause electrical
shock.
11. If any of the following situations arises, get the equipment checked by a service
personnel:
† The power cord or plug is damaged.
† Liquid has penetrated into the equipment.
† The equipment has been exposed to moisture.
† The equipment has not work well or you can not get it work according to
User’s Manual.
† The equipment has dropped and damaged.
† The equipment has obvious sign of breakage.
12. DO NOT LEAVE THIS EQUIPMENT IN AN ENVIRONMENT UNCONDITIONED, STORAGE TEMPERATURE ABOVE 600 C (1400F), IT MAY DAMAGE THE EQUIPMENT.
CAUTION: Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the
manufacturer.
iii
FCC-B Radio Frequency Interference Statement
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 accor-
dance 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 measures listed
below.
† Reorient or relocate the receiving antenna.
† Increase the separation between the equipment and receiver.
† Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
† Consult the dealer or an experienced radio/television technician for help.
Notice 1
The changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
Notice 2
Shielded interface cables and A.C. power cord, if any, must be used in order to
comply with the emission limits.
VOIR LA NOTICE D ’INSTALLATION AVANT DE RACCORDER AU RESEAU.
Micro-Star International
MS-7255
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
iv
WEEE (Waste Electrical and Electronic Equipment) Statement
v
vi
vii viii
CONTENTS
Copyright Notice..............................................................................................................ii
Trademarks.......................................................................................................................ii
Revision History..............................................................................................................ii
Technical Support...........................................................................................................ii
Safety Instructions.........................................................................................................iii
FCC-B Radio Frequency Interference Statement........................................................iv
WEEE (Waste Electrical and Electronic Equipment) Statement....................................v
Chapter 1. Getting Started....................................................................................1-1
Mainboard Specifications...................................................................................1-2
Mainboard Layout................................................................................................1-4
Packing Checklist.................................................................................................1-4
PC AlertTM 4.........................................................................................................1-6
Chapter 2. Hardware Setup..................................................................................2-1
Quick Components Guide....................................................................................2-2
CPU (Central Processing Unit)............................................................................2-2
Introduction to LGA 775 CPU......................................................................2-3
CPU & Cooler Installation.............................................................................2-4
Memory.................................................................................................................2-6
Installing DDRII Modules...............................................................................2-7
Power Supply......................................................................................................2-8
ATX 24-Pin Power Connector: JPWR2......................................................2-8
ATX 12V Power Connector: JPWR1..........................................................2-8
Back Panel............................................................................................................2-8
Connectors........................................................................................................2-10
Floppy Disk Drive Connector: FDD1...........................................................2-11
ATA133 Hard Disk Connectors: IDE1 & IDE2............................................2-11
Serial ATA Connectors: SATA1, SATA2...................................................2-12
Fan Power Connectors: CPUFAN1, PWRFAN1, SYSFAN1....................2-13
Chassis Intrusion Switch Connector: JCASE1.......................................2-13
IEEE 1394 Connectors: J1394_1..............................................................2-14
SPDIF-Out Connector: JSPDIFOUT1.........................................................2-15
Serial Port Connector: JCOM 2.................................................................2-15
Aux Line-In Connector: JCD1...................................................................2-16
Front Panel Connectors: JFP1/JFP2........................................................2-16
Front Panel Audio Connector: JAUD1......................................................2-17
Front USB Connectors: JUSB1, JUSB2...................................................2-18
Jumpers..............................................................................................................2-19
Clear CMOS Jumper: JBAT1.....................................................................2-19
Slots....................................................................................................................2-20
PCI Interrupt Request Routing...................................................................2-20
PCI (Peripheral Component Interconnect) Express Slots.......................2-21
PCI (Peripheral Component Interconnect) Slots......................................2-21
Chapter 3BIOS Setup..............................................................................................3-1
Entering Setup.....................................................................................................3-2
The Main Menu.....................................................................................................3-4
Standard CMOS Features...................................................................................3-6
Advanced BIOS Features...................................................................................3-8
Integrated Peripherals.......................................................................................3-10
Advanced Chipset Features.............................................................................3-11
Power Management Setup...............................................................................3-14
PNP/PCI Configurations.....................................................................................3-16
Cell Menu............................................................................................................3-18
H/W Monitor........................................................................................................3-19
Load Optimized Defaults...................................................................................3-20
BIOS Setting Password.....................................................................................3-22
Appendix A VIA VT8237 SATA RAID Introduction...........................................A-1
Introduction..........................................................................................................A-2
BIOS Configuration..............................................................................................A-3
Installing Operating System & Drivers.............................................................A-10
Using VIA RAID Tool..........................................................................................A-11
Appendix B VIA VT1708 Audio.............................................................................B-1
Installing the VIA VT1708 Audio Driver..............................................................B-2
Installation for Windows 2000/XP......................................................................B-2
Software Configuration......................................................................................B-4
HD Audio Deck: Adeck.........................................................................................B-4
Display Mode........................................................................................................B-5
Simple Mode.................................................................................................B-5
Full Mode......................................................................................................B-5
PANEL DETAIL..............................................................................................B-6
Configuration Panels...................................................................................B-7
Speaker Configuration Panel......................................................................B-7
Mixer Configuration Panel...........................................................................B-9
Effects Configuration Panel......................................................................B-11
Jack Configuration Panel...........................................................................B-13
S/PDIF Configuration Panel.......................................................................B-17
System Information Panel.........................................................................B-17
Hot Key Configuration Panel.....................................................................B-18
ix
Getting Started
Chapter 1
Getting Started
Thank you for choosing the MS-7255 Series (MS-7255
v1.X/v2.X) Micro ATX mainboard. The MS-7255 Series
mainboards are based on VIA® P4M890/P4M900 &
VIA® 8237A chipsets for optimal system efficiency. Designed to fit the advanced Intel® Pentium 4 processor,
the mainboards deliver a high performance and professional desktop platform solution.
1-1
MS-7255 Mainboard
Mainboard Specifications
Processor 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
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
(optional)
1-2
Floppy
- 1 floppy port
- Supports 1 FDD with 360K, 720K, 1.2M, 1.44M and 2.88Mbytes
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)
Getting Started
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.php
1-3
MS-7255 Mainboard
BATT
IDE 1IDE 2FDD 1JCOM
2
VIA
VT8237A
P4M890
/ P4M900
DIMM1DIMM
2
BIOS
JCD1
JSPDIFOUT1
JFP2
JFP1
SYSFAN1
CPUFAN1
JCASE
1
Mainboard Layout
Top : mouse
Bottom:
keyboard
Top :
Parallel Port
Bottom:
COM portA
VGA port
Top:1394
Bottom: USB ports
PWRFAN1
JPWR1
Winbond
W83627EHG
Top: LAN Jack
Bottom: USB ports
T:
Line-In
M:
Line-Out
B:
Mic
T:RS-Out
M:CS-Out
B:SS-Out
VIA
VT6103L
VIA
VT6307
/ VT6308
VT1708
JAUD1
VIA
JPWR2
PCIE_1
PCI E_2
+
PCI 1
PCI 2
JUSB2
J1394_1
JUSB1
JBAT1
MS-7255 v1.X/v2.X M-ATX Mainboard
SATA2
SATA1
1-4
Packing Checklist
Getting Started
MSI motherboard
Power Cable
MSI Driver/Utility CD
Standard Cable for
IDE Devices
SATA Cable (Optional)
Back IO Shield
User’s Guide
* The pictures are for reference only. Your packing contents may vary depending on
the model you purchased.
1-5
MS-7255 Mainboard
PC AlertTM 4
The 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 immediately 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.
Adjusting Keys
Temperature
Modes
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 Fahrenheit (oF) or Celsius (oC). The PC Alert™ 4
icon on the Status Area will show the current
CPU temperature.
Important
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.
1-6
Hardware Setup
Chapter 2
Hardware Setup
This chapter provides you with the information about
hardware setup procedures. While doing the installation,
be careful in holding the components and follow the
installation procedures. For some components, if you
install in the wrong orientation, the components will not
work properly.
Use a grounded wrist strap before handling computer
components. Static electricity may damage the
components.
2-1
MS-7255 Mainboard
Quick Components Guide
2-2
Hardware Setup
CPU (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 pin-pad side of LGA 775
CPU.
Alignment Key Alignment Key
Yellow triangle is the Pin 1 indicator
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 indicator
2-3
MS-7255 Mainboard
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.
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.
2.Remove the cap from lever hinge
side (as the arrow shows).
4.Open the load lever.
2-4
Hardware Setup
Important
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.
5.Lift the load lever up and open the
load plate.
7.Visually inspect if the CPU is
seated well into the socket. If not,
take out the CPU with pure vertical
motion and reinstall.
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 alignment keys are matched.
alignment
key
8.Cover the load plate onto the
package.
2-5
MS-7255 Mainboard
9.Press down the load lever lightly
onto the load plate, and then secure the lever with the hook under
retention tab.
11.Press the four hooks down to fas-
ten the cooler. Then rotate the locking switch (refer to the correct direction marked on it) to lock the
hooks.
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 confirm that the clip-ends are correctly inserted.
locking
switch
Important
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.
2-6
Hardware Setup
Memory
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.
DDRII
240-pin, 1.8V
64x2=128 pin 56x2=112 pin
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.
Important
You can barely see the golden finger if the module is properly inserted in the
DIMM slot.
3. The plastic clip at each side of the DIMM slot will automatically close.
Volt
Notch
Important
-DDRII modules are not interchangeable with DDR and the DDRII standard is
not backwards compatible. You should always install DDRII memory modules 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.
2-7
MS-7255 Mainboard
Power Supply
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 supply 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.
JPWR2 Pin Definition
pin 13
pin 12
PIN SIGNAL
1 +3.3V
2 +3.3V
JPWR2
24
12
13
1
3 GND
4 +5V
5 GND
6 +5V
7 GND
8 PWR OK
9 5VSB
10 +12V
11 +12V
12 NC
ATX 12V Power Connector: JPWR1
This 12V power connector is used to provide power to the CPU.
JPWR1 Pin Definition
JPWR1
1
3
42
PIN SIGNAL
1 GND
2 GND
3 12V
4 12V
PIN SIGNAL
13 +3.3V
14 -12V
15 GND
16 PS-ON#
17 GND
18 GND
19 GND
20 Res
21 +5V
22 +5V
23 +5V
24 GND
Important
1. Maker sure that all the connectors are connected to proper ATX power supplies 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.
2-8
Back Panel
Hardware Setup
Mouse
Parallel
Keyboard USB Ports
VGA PortSerial Port
1394 Port
LAN
L-In
L-Out
Mic
RS-Out
CS-Out
SS-Out
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
Link IndicatorActivity Indicator
can connect a network cable to it.
LED Color LED State Condition
Off LAN link is not established.
Left Orange On (steady state) LAN link is established.
On (brighter & pulsing)The computer is communicating with another computer on the LAN.
Green Off 10 Mbit/sec data rate is selected.
Right On 100 Mbit/sec data rate is selected.
Orange On 1000 Mbit/sec data rate is selected.
2-9
MS-7255 Mainboard
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 SideSurround Out.
2-10
Hardware Setup
Connectors
Floppy Disk Drive Connector: FDD1
This standard FDD connector supports 360K, 720K, 1.2M, 1.44M and 2.88M floppy
disk types.
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.
FDD1
IDE1 (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.
IDE2IDE1
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.
2-11
MS-7255 Mainboard
Serial ATA Connectors: SATA1, SATA2
SATA1, SATA2 are high-speed Serial ATA interface ports. Each supports 1st generation 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
SATA1
SATA2
7 1
Serial ATA cable
1
SATA1, SATA2 Pin Definition
PIN SIGNAL PIN SIGNAL
1 GND 2 RXN
3 RXP 4 GND
5 TXN 6 TXP
7 GND
Take out the dust cover
and connect to the hard
disk devices
Connect to SATA1, 2
Important
Please do not fold the Serial ATA cable into 90-degree angle. Otherwise,
data loss may occur during transmission.
2-12
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