Msi MS-6785 user Manual

Getting Started

Chapter 1. Getting Started

Getting Started

Thank you for purchasing the MS-6785 v1.X Micro ATX

mainboard. The MS-6785 is based on SiS®648FX & SiS®963 chipsets for optimal system efficiency. Designed to fit the advanced Intel® Pentium® 4 processors in the 478 pin package, the MS-6785 delivers a high performance and professional desktop platform solution.

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MS-6785 M-ATX Mainboard

Mainboard Specifications

CPU

h Socket 478 for P4 processors with 400/533/800 MHz (100/133/200MHz QDIR). h Core frequency up to 3.2GHz.

Chipset

h SiS®648FX (839 pin BGA)

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

- Supports 64-bit high performance DDR400/333/266 memory controller.

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

- Supports bi-directional 16-bit data bus with 1GHz bandwidth MuTIOL.

h SiS®963 (371 pin BGA)

- Supports high throughput SiS MuTIOL 1GHz interconnecting to SiS®963 media I/O.

- Supports Dual-IDE A T A 66/100/133.

- Integrated Direct Sound AC97 audio.

- Low pin count interface for SIO.

- Advanced power management and PC2001 compliance.

- High speed USB 2.0 controller, 480Mb/s.

Main Memory

h Supports four memory banks using two 184-pin DDR DIMMs. h Supports up to 2GB PC3200/2700/2100DDR SDRAMs. h Supports 2.5v DDR SDRAM.

Slots

h One AGP (Accelerated Graphics Port) slot

- Supports AGP 3.0 4x/8x.

h Three 32-bit PCI bus slots.

- Support 3.3v/5v PCI bus interface.

- The second PCI slot in BLUE supports 2 master devices.

On-Board IDE

h Dual IDE controllers integrated in SiS 963. h Supports P/O, Bus Master, Ultra DMA66/100/133 operation. h Can connect up to four IDE devices.

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Getting Started

On-Board Peripherals

h On-Board Peripherals include:

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

2.88Mbytes

- One serial port (COM A)

- One parallel port supports SPP/EPP/ECP mode (Optional)

- One RJ-45 LAN port

- Vertical audio ports

- One RCA_SPDIF In & one RCA_SPDIF Out

- Three 1394 ports [Rear x 2 (6 / 4 pins) + Front x 1 (6 pins)]

- Six USB 2.0 ports (Rear * 2/ Front * 4)

Onboard IEEE1394

h Integrated in SiS®963. h Agere FW803 PHY.

Audio

h S/W C-Media 9739A 5.1 channel with SPDIF in/out.

LAN

h VIA® VT6103 LAN controller.

BIOS

h The mainboard BIOS provides “Plug & Play” BIOS which detects the pe-

ripheral devices and expansion cards of the board automatically.

h The mainboard provides a Desktop Management Interface (DMI) function

which records your mainboard specifications.

Dimension

h Micro ATX Form Factor: 24.0 cm x 24.5 cm.

Mounting

h 6 mounting holes.

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MS-6785 M-ATX Mainboard

Mainboard Layout

Top : mo us e Bottom: keyboard

JLPT1

T: RJ 45 LA N j ac k B: USB ports

1394 port

Mini1394 port

T:SPDIF in B:SPDIF out

Line-Out

Line-Out Line-Out

Line-Out

T:M ic B:Line-In

VT6103

JSPDIF1

Codec

CPUFAN1

AGERE FW803

VIA

JPW1

SiS

BIOS

CN8

Winbond 83697HF

648FX

AGP Slot

PCI Slot 1

PCI Slot 2

PCI Slot 3

BATT

JVEDIO1

JAUDIO1

JBAT1

MS-6785v1.X Micro A TX Mainboard

1 D D F

l p p u

e w o P

SiS

963

JUSB1

F_P1

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Hardware Setup

Chapter 2. Hardware Setup

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.

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MS-6785 M-ATX Mainboard

Quick Components Guide

Back Panel I/O, p.2-10

J7, p.2-23

J9, p.2-20

AGP Slot, p.2-25

JSPDIF1, p.2-21

JVIDEO1, p.2-18

JPW1, p.2-9

CPU, p.2-3

CPUFAN1, p.2-17

DIMM1/2,

p.2-7

CONN1,

p.2-9

FDD1,

p.2-15

IDE2,

p.2-16

IDE1,

p.2-16

JUSB1,

p.2-19

PCI Slots,

p.2-25

2-2

JBAT1, p.2-24

F_P1, p.2-18JAUDIO1, p.2-22

Hardware Setup

Central Processing Unit: CPU

The mainboard supports Intel® Pentium® 4 processors 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 has a heat sink and a cooling fan attached on the top to prevent overheating. If you do not find the heat sink and cooling fan, contact your dealer to purchase and install them before turning on the computer.

CPU Core Speed Derivation Procedure

If CPU Clock = 100MHz

Core/Bus ratio = 14

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

= 100MHz x 14 = 1.4 GHz

MSI Reminds You...

Overheating

Overheating will seriously damage the CPU and system, always make sure the cooling fan can work properly to protect the CPU from overheating.

Replacing the CPU

While replacing the CPU, always turn off the ATX power supply or unplug the power supply’s power cord from grounded outlet first to ensure the safety of CPU.

Overclocking

This motherboard is designed to support over clocking. 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 r ecommended. We

do not guarantee the damages or risks caused by inadequate operation or beyond product specifications.

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MS-6785 M-ATX Mainboard

CPU Installation Procedures for Socket 478

1. Please turn off the power and unplug the power cord before installing the CPU.

Open Lever

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 towards 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 procedures may cause permanent damages to your mainboard.

5. Press the CPU down firmly into the socket and close the lever. As the CPU is likely to move while the lever is being closed, always close the lever with your fingers pressing tightly on top of the CPU to make sure the CPU is properly and completely embedded into the socket.

Sliding

Plate

Gold arrow

Press down

the CPU

90 degree

Correct CPU placement

Incorrect CPU placeme n t

Close Lever

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Hardware Setup

Installing the CPU Fan

As processor technology pushes to faster speeds and higher performance, thermal management becomes increasingly important. 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:

1. Locate the CPU and its retention

mechanism on the motherboard.

retention mechanism

3. Mount the fan on top of the heatsink.

Press down the fan until its four clips get wedged in the holes of the retention mechanism.

2. Position the heatsink onto the retention mechanism.

4. Press the two levers down to fasten the fan. Each lever can be pressed down in only ONE direction.

levers

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MS-6785 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

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NOTES

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