User's Manual

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2.4 66/100MHz System Configuration

The jumper 2 (JP2) allows you to set FSB (Front Side Bus) to be 66 or 100MHz configuration.

When you set FSB to 66MHz, you can select the system bus frequency from 66MHz to 83.3MHz

through “CPU Host Clock (CPU/PCI)” of “Chipset Features Setup” in BIOS (Please refer to page

26). When you set FSB to 100MHz, you can select the system bus frequency from 100MHz to

150MHz through “CPU Host Clock (CPU/PCI)” of “Chipset Features Setup” in BIOS (Please

refer to page 26).

NOTE: Because Celeron socket 370 CPU now can support 66MHz FSB only, we strongly

recommend that you set JP2 as 66MHz. Otherwise it may cause system damaged. If

Intel releases new version Celeron CPU to support 100MHz FSB, then you can set JP2

as 100MHz to increase system performance.

HARDWARE INSTALLATION 6

2.5 CPU Internal Frequency Ratio Setting

The switch 1 (SW1) is designated for adjusting the CPU internal frequency ratio. The frequency

ratio is defined as the table shown below. The internal frequency can be calculated by the follow-

ing formula:

CPU internal frequency = frequency ratio x system bus frequency *

* System bus frequency is set in “CPU Host Clock (CPU/PCI)” of “Chipset Features Setup” in

BIOS (Please refer to page 26).

NOTE: Because Intel has locked the Socket 370 Celeron CPU’s frequency ratio, setting

SW1 to adjust the frequency ratio is useless. Howerer, it may be effective if Intel unlocks

the frequency ratio in the future.

Transcend

DIMM1 (64/72bit 168pin SDRAM Module)

DIMM2 (64/72bit 168pin SDRAM Module)

COM1

Printer

Parallel Port

AGP

PCI Slot1 (PCI1)

PCI Slot4 (PCI4)

PCI Slot2 (PCI2)

PCI Slot3 (PCI3)

ISA Slot1 (ISA1)

ISA Slot2 (ISA2)

Intel443ZXAGP Set

IntelPIIX4ChipSet

CR2032 3VLithium Cell

Primary IDE Connector

Second IDE Connector

Floppy Connector

2Mbit Flash (BIOS)

Multi-I/O&KeyboardController

FrequencyDIP Switch

PANEL

Panel Switch

IDE1IDE2

CASE-FAN

CPU-FAN

FDC

PCI1

PCI2

PCI3

PCI4

ISA1

ISA2

IrDA

Infrared Port

WOL

Wake On LAN

AGP

COMA

Thermal Sensor

CMOS_CLR

HardwareMonitor

TS-ABX31 66/100MHz FSB

PS/2

T:Mouse B:Keyboard

USB

T:Port 1 B:Port 2

COM2

ATX Power Connector

POWER-FANPWR-CONN

KB MOUSE

USB

COMB

ThermalSensor

KB-AWK

JP2

66MHz

100MHz

66/100MHz

Confi

uration Jumper