MSI ATX BX2 User manual

CHAPTER 1 INTRODUCTION

1-1

The ATX BX2 mainboard is a high-performance personal computer

mainboard based on the Pentium®II processor. The Pentium®II processor

supports MMXTM (Multimedia Extension) technology.

The mainboard uses the highly integrated Intel®82443BX AGP chipset to

support the PCI/ISA and Green standards, and to provide the Host/AGP

bridge. The Intel®82371EB chipset integrates all system control functions

such as ACPI (Advanced Configuration and Power Interface). The ACPI

provides more Energy Saving Features for the OSPM(OS Direct Power

Management) function. The Intel®82371EB chipset also improves the IDE

transfer rate by supporting Ultra DMA/33 IDE that transfers data at the rate

of33MB/s.

The mainboard also supports the System Hardware Monitor Controller as an

optional function. This function includes: CPU /power supply/chassis fan

revolution detect, CPU/system voltage monitor, system temperature monitor,

and chassis intrusion detect(optional).

Chapter 1

INTRODUCTION

CHAPTER 1 INTRODUCTION

1.1 Mainboard Features

CPU

lSlot 1 for Pentium®II processor.

lSupports233MHz,266MHz,300MHz,333MHz, 400MHz,andfaster.

lCore/Busratiosare x2,x2.5,x3,x3.5,x4,x4.5,x5,x5.5,x6andhigher.

SwitchingVoltageRegulator

lOn-board switching mode DC-DC Step Down Regulator.

lConforms to Intel®VRM ver 8.2 specifications.

lOver-Voltage and Over-Current protection.

Chipset

lIntel®82440BXAGP chipset.

ClockGenerator

l66.6MHz and 100MHz clocks are supported.

l68/75/83MHzand 103/112MHzclocks(reserved)

MainMemory

lSupports six memory banks using three 168-pin unbuffered DIMM

sockets.

lSupportsamaximummemorysizeof384MB(8Mx8) or768MB(16Mx4)

registered DIMM only.

lSupportsECC(1-bitErrorCodeCorrect)function.

lSupports only 3.3v SDRAM DIMM.

Slots

lOne AGP(Accelerated Graphics Port) slot.

- AGP specification compliant

- AGP66/133MHz3.3vdevicesupport

lFour 32-bit Master PCI Bus slots and three 16-bit ISA bus slots wherein

one shared slot that can be used as ISA or PCI.

lSupports 3.3v/5v PCI bus Interface.

1-2

CHAPTER 1 INTRODUCTION

1-3

On-BoardIDE

lAn IDE controller on the Intel®82371EB PCI chipset provides IDE HDD/

CD-ROM with PIO, Bus Master and Ultra DMA/33 operation modes.

lCan connect up to four IDE devices.

On-BoardPeripherals

lOn-BoardPeripheralsinclude:

-1floppyportsupports2FDDwith360K,720K,1.2M,1.44Mand

2.88Mbytes.

-2serialports(COMA+COMB)

- 1 parallel port supports SPP/EPP/ECP mode

- 2 USB ports

- 1 IrDA connector for Fast IrDA. (reserved)

BIOS

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

peripheral devices and expansion cards of the board automatically.

lThe mainboard provides a Desktop Management Interface(DMI) function

which records your mainboard specifications.

lThe mainboard provides “CPU Plug & Play” function. (reserved)

CPU Plug & Play - the user don’t need jumper/DIP switch to set the CPU

speed setting. The BIOS is used to set the speed.

SystemHardwareMonitor(optional)

lCPU/Power Supply/Chassis Fan Revolution Detect

lCPU Fan Control (the fan will automatically stop when the system enters

suspend mode)

lSystem Voltage Detect

lCPU Overheat Warning (reserved)

lChassis Intrusion Detect (reserved)

lDisplay Actual Current Voltage

RTC

lPIIX4(82371EB)built-inRTC.

CHAPTER 1 INTRODUCTION

1-4

KeyboardConnector

lPS/2®keyboard interface and PS/2®mouse interface.

Dimension

lATXFormFactor: 30cm(L)x18.6cm(W)x4 layersPCB.

lDouble deck I/O connectors, compatible with Intel®Venus Mainboard.

Mounting

l6 mounting holes.

OtherFeatures

lKeyboard Password Wake-Up.(reserved)

lLANWake-Up.

lInternal/ExternalModem Wake-Up.

lAC Power Loss Restore.

CHAPTER 1 INTRODUCTION

1.2 Mainboard Layout

FDD IDE1

IDE2

DIMM 1

DIMM 2

DIMM 3

Top: mouse

Top: Port1

USB

Bottom:

Port2

Top: LPT

Bottom:

COMA

COMB

ATX

Power Supply

JP1

CPUFAN1

PCI SLOT 3

PCI SLOT 2

PCI SlOT 1

SLOT 1

AGP Slot

PCI SLOT 4

JGS1

JGL1

ISA SLOT 2

ISA SLOT 3

BATT

BIOS

JMODE1

SFAN1

(optional)

IR1

JSOR1

(optional)

JFP1

FW82371EB JBAT1

1-5

JVSB

FW82443BX

JRMS1

JWOL

JMDM1

Bottom:

keyboard

ISA SLOT 1

PSFAN1

(optional)

SW1

CHAPTER 2 HARDWARE INSTALLATION

2-1

Chapter 2

HARDWARE INSTALLATION

2.1 Central Processing Unit: CPU

The mainboard operates with Intel®Pentium®IIprocessor. The mainboard

used a CPU Slot called Slot 1 for easy CPU installation. To set the proper

speed for the CPU, you should first check your mainboard. There are two

kinds of mainboard: CPU Plug & Play mainboard & Standard mainboard.

CPU Plug & Play mainboard speed setting is set on the BIOS setting.

Standard mainboard speed setting is set by DIP switch. The CPU should

always have a Heat Sink and a cooling fan attached to prevent overheating.

CHAPTER 2 HARDWARE INSTALLATION

2-2

2.1-1 CPU Installation Procedures

A. OEM Pentium®II Processor Installation Procedures

Different kinds of Pentium®II processor that is currently used: the OEM

version, the Boxed version, and CeleronTM. OEM Pentium®II Processor has

no Heat Sink, Fan and Heat Sink Support, the Boxed Pentium®II Processor

is provided with Heat Sink w/ fan and Heat Sink Support, while the

CeleronTM processor is a plane processor card without cover or heatsink..

Required Things:

Pentium®IIprocessor- Processor.

*RetentionMechanism(RM)- PlasticGuidethat holds the S.E.C. Catridge

in the Slot 1 connector.

*RetentionMechanismAttachMount(RMAM)-Bolt/Bridge assemblies

inserted up through the bottom of the

motherboard. RM secures to RMAM ( 2

RMAM required per RM ).

*Heat SinkSupport Base (HSSBASE) - Plastic support bar mounted to

the mainboard under the ATX heatsink.

(One leg is always bigger than the other one)

Processor

Lock

Retention

Mechanism

Pentium®II

Processor

Heat Sink

W/Fan

Notch Hole

Heat Sink

Support Base Heat Sink

Support Pin

Heat Sink

Support

Top Bar

CHAPTER 2 HARDWARE INSTALLATION

2-3

*HeatSink Support Pin(HSSPIN) - Plastic pins inserted through the

HSSBASE to secure it to the mainboard (2

required per Assembly).

*Heat SinkSupport Top Bar (HSSTOP) - Plastic bar that clips onto the

HSSBASE through the fins on the ATX

heatsink.

**Heat Sink w/ fan - Heat Sink that can be attached to thePentium®II

processorwithmetalclip.

Note:* Provided by MSI mainboard.

** Provided by Special request.

HSSPIN

HSSTOP

HSSBASE

RMAM

CHAPTER 2 HARDWARE INSTALLATION

2-4

SLOT1

Retention

Mechanism

êê

Key

êê

Retention

Mechanism

Attach Mount

Notch

Key

Step 1: Insert the Retention Mechanism Attach Mount at the bottom

of the mainboard.

Step 2: Install the Retention Mechanism.

Look for the key on Slot 1, and match it with the Notch Key on the

Retention Mechanism for proper direction. Then, attach the

Retention Mechanism to the Retention Mechanism Attach Mount.

Use a Screwdriver to secure the Retention Mechanism.

CHAPTER 2 HARDWARE INSTALLATION

2-5

Step 3: Install the Heat Sink Support Base.

Look for the Two holes across Slot 1, and match it with the Two legs

of the Heat Sink Support Base for the proper direction. Take note

that one hole/leg is bigger than the other. The Four top pins of the

Heat Sink Support Base should also be oriented towards Slot 1.

Push the Heat Sink Support Base onto the mainboard, until you hear

a click sound. Check for a perfect fit.

Step 4: Install the Heat Sink Support Pin.

Push the Heat Sink Support Pins onto the two holes of the Heat Sink

Support Base. Check for a perfect fit. These pins are used to secure

the Heat Sink Support Base.

Heat Sink

Support Base

Heat Sink

Support Pin

Leg

pins

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