SOYO SY-6VBA 133 quick start CPU Host/PCI Clock, CPU Ratio, Dram Clock

SY-6VBA 133 Quick Start Guide

If you set this field to [Manual], you are then required to fill in the next two consecutive fields:

(1) the CPU Host/PCI Clock, and (2) the CPU Ratio.

(1) CPU Host/PCI Clock

CPU Host / PCI Clock

o66/33	o95/31	o115/38	o124/41	o140/35
o75/37	o100/33	o117/39	o126/31	o142/35
o78/39	o105/35	o118/39	o133/33	o144/36
o81/40	o110/36	o120/40	o135/33	o150/37
o83/41	o112/37	o122/37	o137/34	o155/38
o90/30	o113/37	o124/31	o138/34

Under this item you find the frequencies your PCI slots run at.

(2) CPU Ratio

After you have selected the CPU Host/ PCI Clock, choose the right multiplier for the CPU. CPU Ratio options are:

o x 2	o x 2.5	o x 3	o x 3.5	o x 4
o x 4.5	o x 5	o x 5.5	o x 6	o x 6.5
o x 7	o x 7.5	o x 8

The CPU frequency is then defined as [host clock freq.] x [multiplier], and should equal the working frequency of your CPU.

(3) DRAM Clock

Now select the DRAM clock source. It is derived form the CPU FSB clock and it can, depending on the BIOS setting, be:

ØEqual to the CPU FSB clock

ØCPU FSB clock –PCI clock

ØCPU FSB clock + PCI clock

As an example: If the user sets the CPU Host/PCI clock to 105/35 MHz, the options will be:

ØEqual to the CPU FSB clock = 105 MHz

ØCPU FSB clock –PCI clock = 70 MHz

ØCPU FSB clock + PCI clock = 140 MHz

Depending on the DRAM speeds, the user can select one of these speeds through the BIOS.

Quick BIOS Setup

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