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SY-6VBA 133
Quick Start Guide
13
Quick BIOS
Setup
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
o
66/33
o
95/31
o
115/38
o
124/41
o
140/35
o
75/37
o
100/33
o
117/39
o
126/31
o
142/35
o
78/39
o
105/35
o
118/39
o
133/33
o
144/36
o
81/40
o
110/36
o
120/40
o
135/33
o
150/37
o
83/41
o
112/37
o
122/37
o
137/34
o
155/38
o
90/30
o
113/37
o
124/31
o
138/34
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:
Ø
Equal to the CPU FSB clock
Ø
CPU FSB clock – PCI clock
Ø
CPU FSB clock + PCI clock
As an example: If the user sets the CPU Host/PCI clock to 105/35 MHz, the options will be:
Ø
Equal to the CPU FSB clock = 105 MHz
Ø
CPU FSB clock – PCI clock = 70 MHz
Ø
CPU FSB clock + PCI clock = 140 MHz
Depending on the DRAM speeds, the user can select one of these speeds through the
BIOS.