VIA Technologies P4PA User Manual page 60

BIOS Setup
provides a method for end-users to overclock the processor accordingly.
If the CPU clock is set over the tolerance limit of the CPU, the mainboard will
show the following message "IMPROPER OVERCLOCKING SETTING,
SYSTEM IS RESETTING CPU CLOCK TO DEFAULT. Please re-enter BIOS
Setup and remember to save before quit!". This feature protects the CPU from
damage due to overclocking.
CPU Ratio
This setting controls the multiplier that is used to determine the internal clock
speed of the processor relative to the external or motherboard clock speed.
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