Abit AX5 Instruction Booklet page 31

Installing the Mainboard
CPU Voltage - Vcore and Vio
From the voltage point of view, 586 series CPU can be divided into two
categories: single voltage CPU and dual voltage CPUs. Single voltage
CPUs include: Intel Pentium P54C series, AMD-K5 and Cyrix 6x86, etc.
Dual voltage CPUs include: Intel P55C with MMX, future AMD-K6 CPUs,
Cyrix 6x86L and 6x86MX.
The voltage of dual voltage CPUs has two components: Vcore and Vio.
Vcore provides all the power for internal processing, and its power
consumption is quite important. Vio provides the power necessary for the
external interface of the CPU.
P-Rating
The P-Rating was defined by some manufacturers other than Intel to rate
the performance of their CPU in comparison with Intel Pentium CPUs. For
instance, Cyrix 6x86 P166+ has a higher actual speed compared with Intel
Pentium P166, its internal clock needs only 133MHz versus 166MHz for
Intel' s product. The main reason is that Cyrix has improved the internal
architecture of the 6x86 CPU, which means that with the same internal
clock speed, the actual clock speed will be different.
Having read the related terminology above, please refer to the information in
appendices B, C or D for the type and specifications of your own CPU. We
suggest that you note down these specifications, which will help you when you
install the CPU.
CPU Settings:
To configure the speed and the voltage of the CPU, you must enter to the CPU
SOFT MENU in BIOS Setup.
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CPU SOFT
MENU ¡I ¡I
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