SOYO V1.0, V1.1 CPU BUS Clock AGP BUS, Clock PCI Clock JP7 JP9 JP10 SDRAM, Clock

SY-5EHM/5EH5 V1.x Quick Start Guide

Installation

Jumper JP7 is used to indicate the frequency of the CPU bus clock to the ETEQ chipset. Jumpers JP9

and JP10 are used to determine that the SDRAM is running at the frequency of the CPU bus clock or at

that of the AGP clock.

CPU BUSClock AGP BUSClock PCI Clock JP7 JP9 JP10 SDRAMClock

66MHz 66MHz 33MHz 2-3 2-3 1-2 66MHz

75MHz 75MHz 37.5MHz 2-3 2-3 1-2 75MHz

1-2 1-2 2-3 55MHz

83MHz 55MHz 27.5MHz 1-2 2-3 1-2 83MHz

1-2 1-2 2-3 63.4MHz

95MHz 63.4MHz 31.7MHz 1-2 2-3 1-2 95MHz

1-2 1-2 2-3 66MHz

100MHz 66MHz 33MHz 1-2 2-3 1-2 100MHz

1-2 1-2 2-3 75MHz

112MHz 75MHz 37.5MHz 1-2 2-3 1-2 112MHz

1-2 1-2 2-3 82.6MHz

124MHz 82.6MHz 41.3MHz 1-2 2-3 1-2 124MHz

Note:

Use 8ns or faster SDRAM modules (for PC100) when SDRAM is set to run

at the frequency of 95/100MHz.

There are two types of CPU burst modes according to manufacturer design:

Interleave Burst (CPU: Intel P54C/P55C, AMD K5/K6/K6-2/K6-III,IDT X86

CPU, Rise mP6)

Linear Burst (CPU: Cyrix 6x86/L/MX/M II)

Interleave Linear

CPU Burst Mode Intel™ P54C/P55C

AMD™ K5/K6/K6-2/K6-III

IDT X86 CPU, Rise mP6

Cyrix™ 6x86/L/MX/M

JP22 Setting When using Intel

or AMD CPUs.

(Default)

When using

Cyrix type of

CPU.

If you are using a Cyrix™ 6x86/L/MX/M II series CPU, set the burst mode to Linear by

shorting pin 2-3 on jumper JP22, and follow the following steps to select the correct Linear

burst mode in BIOS:

During the boot-up initial sequence, press the [Delete] key to enter the BIOS setup menu.

Select the [CHIPSET FEATURES SETUP] section in BIOS.

In the [CHIPSET FEATURES SETUP] sub-menu, set the [Linear Burst] field to [Enabled].

Press [Esc] to return to the BIOS main menu.

Then choose [Save & Exit Setup] to re-boot your computer.