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BIOS Setup Utility
SY-P4I845PEISA/GEISA
42
CPU Clock Ratio
Setting Description Note
CPU Clock
Ratio
8X ~ 50X The available CPU ratio you can select will depends
on your CPU ID.
Enabled
C.I.H.
4-WAY
Protection
Disabled
This item allows you
write-protect your BIOS chip
from virus. If you want to flash
your BIOS, set this option to
disabled
Default
Enabled Default
Onboard
LAN
Disabled
This item allows you to control
Onboard LAN.
Disabled Disables any clock signals on not
used PCI slots. For EMI
purposes.
Default
Auto Detect
PCI Clk
Enabled
Disabled Default
0.35%
0.50%
0.75%
Spread
Spectrum
1.00%
Modulates the clock signal on the
CPU. For EMI purposes.