MSI MS-6791 Manuel utilisateur

1-1

Getting Started

Thank you for purchasing the MS-6791 v1.x M-ATX

mainboards. The MS-6791 is a superior computer motherboard

based on SiS648FX/661FX and SiS963/963L chipsets for

optimal system efficiency. Designed to fit the advanced Intel®

Pentium®4 Northwood/Prescott processors in the 478 pin

package, the MS-6791 delivers a high performance and

professional desktop platform solution.

Getting Started

1-2

MS-6791 M-ATX Mainboard

Mainboard Specifications

CPU

hSupports Socket 478 for P4 processor with 400/533/800 MHz (100/133/200

MHzQDIR)

hCore frequency up to 3.2GHz or above

Chipset

hSiS®648FX/661FX chipsets

- Supports Intel Pentium 4 processors with data transfer rate up to 800MHz

- Supports 64-bit high performance DDR400/DDR333/DDR266 memory

controller

- Supports AGP 8X/4X interface at 0.8v or 4x at 1.5v with fast write transaction

- Supports on-board graphics core (SiS 661FX only)

hSiS®963/963L chipsets

- Dual-IDE ATA 66/100/133

- ACPI & PC2001 compliant enhanced power management

- Integrated audio controller with AC97 interface

- Integrated high speed USB 2.0 controller, 480Mb/s

MainMemory

hSupports two 184-pin DDR 200/266/333/400 DIMMs

hSupports up to 2GB memory size without ECC

Slots

hOne AGP (Accelerated Graphics Port) slot

- AGP specification compliant

- Supports AGP 3.0 4x/8x

hThree 32-bit PCI bus slots

On-Board IDE

hAn IDE controller on the SiS®963/963L chipset provides IDE HDD/CD-

ROM with PIO, Bus Master and Ultra DMA66/100/133 operation modes

hCan connect up to 4 IDE devices

On-Board Peripherals

hOn-Board Peripherals include:

- 1 floppy port supports 2 FDDs with 360K, 720K, 1.2M, 1.44M and

2.88Mbytes

1-3

Getting Started

- 2 serial ports (COM A + COM B)

- 1 parallel port supports SPP/EPP/ECP mode

- 1 audio port (Line-in, Line-out, Mic-in)

- 6 high speed USB 2.0 ports (Rear * 4/ Front * 2)

- 1 IrDA connector for SIR

- 1 RJ-45 LAN jack (Optional)

Audio

h6-channel audio codec RealTek ALC650/655 (Optional)

h2-channel audio codec RealTek ALC202A (Optional)

LAN (Optional)

hRealtek 8100C

BIOS

hThe mainboard BIOS provides “Plug & Play” BIOS which detects the

peripheral devices and expansion cards of the board automatically.

hThe mainboard provides a Desktop Management Interface (DMI) function

which records your mainboard specifications.

Dimension

hM-ATX Form Factor: 24.4cm (L) x 24.4cm (W)

Mounting

h6 mounting holes

Others

hACPI support, including STR/STD (S3/S4)

hSupport WOM/WOL

hPC2001 compliant

1-4

MS-6791 M-ATX Mainboard

JUSB1 JUSB2

Mainboard Layout

MS-6791 v1.X M-ATX Mainboard

BATT

DDR1

DDR2

J1394_1 J1394_2

JFP1

JMR1

JCI1

JSMI1

JUSB1

JUSB3

JUSB4

JUSB2

ATX

PowerSupply

NBFAN1

CPUFAN1

PWRFAN1

PWRSW1

CHSFAN1

JBAT1

JGLED1

BIOS_WP1

BIOS

IDE1

IDE2

To p : P a ra l l e l P o r t

Bottom:

COM A

COM B (SiS648FX)

VGA (SiS661FX)

Top : mouse

Bottom: keyboard

Top: LAN Jack

Bottom: USB

ports

USB ports

MDM_IN1

JLAN1

JCPU_TEMP

CD_IN1

CD_IN2

JAUD1 JAUDIO1

Codec

Realtek

8801B

RealTek

8100C

Winbond

W83697HF

JPW1

FDD1

AGP Slot

PCI Slot3

PCI Slot2

PCI Slot1

Line-Out

B:Mic

Line-In

SiS

648FX/661FX

SiS

963/963L

IR1

JWOL1

JSP1

JUSB3 JUSB4

2-1

Hardware Setup

Chapter 2. Hardware

Setup

This chapter tells you how to install the CPU, memory

modules, and expansion cards, as well as how to setup the

jumpers on the mainboard. Also, it provides the instructions on

connecting the peripheral devices, such as the mouse, keyboard,

etc.

While doing the installation, be careful in holding the

components and follow the installation procedures.

Hardware Setup

2-2

MS-6791 M-ATX Mainboard

Quick Components Guide

JSP1, p.2-23

MDM_IN1, p.2-22

DDR DIMMs, p.2-7

CPU, p.2-3

Back Panel I/O,

p.2-10

CPUFAN, p.2-17

CHSFAN, p.2-17

JBAT1, p.2-29

JCI1, p.2-27

IDE1, IDE2,

p.2-19

PWRFAN1, p.2-17

IR1,p.2-28

CONN1, p.2-9

JLEG1, p.2-18

FDD1, p.2-16

JFP1, p.2-18

JMR1, p.2-26

JWOL1, p.2-26

JGLED1, p.2-27

JAUDIO1, p.2-20

NBFAN, p.2-17

JPW1, p.2-9

PWRSW1, p.2-28

USB Ports, p.2-24

JSMI1, p.2-27

J1394_1/2, p.2-25

JAUD1, p.2-20

BIOS_WP1,p.2-30

JLAN1, p.2-30

CD_IN1, p.2-22

CD_IN2, p.2-22

JCPU_TEMP, p.2-28

2-3

Hardware Setup

Central Processing Unit: CPU

CPU Core Speed Derivation Procedure

If CPUClock = 100MHz

Core/Bus ratio = 16

then CPU core speed = Host Clock x Core/Bus ratio

= 100MHz x 16

= 1.6GHz

The mainboard supports Intel®Pentium®4 Northwood/Prescott processor

in the 478 pin package. The mainboard uses a CPU socket called PGA478 for

easy CPU installation. When you are installing the CPU, make sure the CPU

hasaheatsinkandacoolingfanattachedonthetoptopreventoverheating. If

you do not find the heat sink and cooling fan, contact your dealer to purchase

and install them before turning on the computer.

MSIRemindsYou...

Overheating

Overheating will seriously damage the CPU and system, always

make sure the cooling fan can work properly to protect the CPU

from overheating.

Overclocking

This motherboard is designed to support overclocking. However,

please make sure your components are able to tolerate such

abnormal setting, while doing overclocking. Any attempt to

operate beyond product specifications is not recommended. We

do not guarantee the damages or risks caused by inadequate

operation or beyond product specifications.

Memory Speed/CPU FSB Support Matrix

FSB Memory DDR266

400MHz

DDR333 DDR400

533MHz

800MHz

N/A

OK OK

N/A

OK OK

2-4

MS-6791 M-ATX Mainboard

CPU Installation Procedures for Socket 478

1. Please turn off the power and

unplug the power cord before

installing the CPU.

2. Pull the lever sideways away

from the socket. Make sure

to raise the lever up to a 90-

degree angle.

3. Look for the gold arrow. The

gold arrow should point to-

wards the lever pivot. The

CPU can only fit in the correct

orientation.

4. If the CPU is correctly

installed, the pins should be

completely embedded into the

socket and can not be seen.

Please note that any violation

of the correct installation pro-

cedures may cause permanent

damages to your mainboard.

5. Pressthe CPUdownfirmlyinto

the socket and close the lever.

As the CPU is likely to move

whiletheleverisbeingclosed,

always close the lever with

your fingers pressing tightly

ontopof the CPUtomakesure

the CPU is properly and com-

pletely embedded into the

socket.

Open Lever

90 degree

Sliding

Plate

Lever

Press down

the CPU

Gold arrow

Correct CPU placement

Incorrect CPU placement

2-5

Hardware Setup

InstallingtheCPUFan

As processor technology pushes to faster speeds and higher

performance,thermalmanagement becomes increasinglyimportant.To dissipate

heat, you need to attach the CPU cooling fan and heatsink on top of the CPU.

Follow the instructions below to install the Heatsink/Fan:

2. Position the heatsink onto the reten-

tion mechanism.

1. Locate the CPU and its retention

mechanism on the motherboard.

3. Mount the fan on top of the heatsink.

Press down the fan until its four clips

get wedged in the holes of the reten-

tion mechanism.

4. Press the two levers down to fasten

the fan. Each lever can be pressed

down in only ONE direction.

retention mechanism

levers

2-6

MS-6791 M-ATX Mainboard

5. Connect the fan power cable from the mounted fan to the 3-pin fan power connector

on the board.

fan power cable

NOTES

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