Abit AR5 User Manual page 35

Introduction of BIOS
¤ When the CPU is dual voltage, two options will be displayed to set up
Vcore and Vio plane voltage
/ Core Plane Voltage:
ä 2.93v ¡G For AMD K6 and Cyrix 6x86L CPU.
ä 2.80v ¡G For Intel Pentium MMX CPUs.
ä 2.70v ¡G For future CPUs.
ä 2.50v ¡G For future CPUs.
/ I/O Plane Voltage:
ä 3.52v ¡G Reserved
ä 3.38v ¡G Some CPUs from AMD need this I/O Plane Voltage.
ä 3.30v ¡G For most of the dual voltage CPUs (default) currently
The CPU voltage must be set according to voltage indications via CPU
Marking given by the manufacturer. Since the CPU voltage will decrease as
technology improves, we have reserved some options according to what we can
forecast from present documentation. We cannot give you detailed information
about the voltage required by each kind of CPU in this chapter. For the correct
values, refer to appendices B, C and D.
¤ Set up the voltage via CPU Marking:
If you consider using the Appendices to set up as too complicated, you
can use the CPU Marking: within the options under "CPU Marking Is,"
set up via CPU Marking on the CPU.
Notes:
1. If your CPU is a dual voltage one and that the voltage set up is 3.25V,
our mainboard features a hardware protection circuit that will lower
the voltage between 2.8V and 2.9V, which is within the CPU operating
voltage limits.
2. The voltage value given is the central value. For example, the voltage
range of 3.52V is 3.45V to 3.6V. The central voltage value between
3.45V and 3.6V is 3.52V.
available.
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