Hardware Installation
2-6
Warning:
Please make sure that you have installed CPU fan
properly if Intel PP/MT-233 or AMD K6 CPU is being selected
to use. It may cause your system unstable if you can not meet
the heat dissipation requirement from above CPU type. It is
recommended to adopt larger fan on these CPU for better air
flow in the system. Please refer to AOpen 's web site
(http://www.aopen.com.tw) to choose a proper CPU fan.
Tip:
Normally, for single voltage CPU, Vcpuio (CPU I/O
Voltage) is equal to Vcore, but for CPU that needs dual voltage
such as PP/MT (P55C) or Cyrix 6x86L, Vcpuio is different from
Vcore and must be set to Vio (PBSRAM and Chipset Voltage).
The single or dual voltage CPU is automatically detected by
hardware circuit.
Tip:
For supporting more different CPUs in future, this
motherboard uses five switchs to specify Vcore. There are 32
settings totally, and the range is from 1.3V to 3.5V.
CPU
Type
S4
S5
S6
S7
S8
Vcore
INTEL P54C
Single Voltage
OFF
ON
ON
ON
OFF
3.45V
INTEL MMX P55C
Dual Voltage
OFF
OFF
OFF
ON
OFF
2.8V
AMD K5
Single Voltage
ON
ON
ON
ON
OFF
3.52V
AMD K6-166/200
Dual Voltage
ON
OFF
OFF
ON
OFF
2.9V
AMD K6-233
Dual Voltage
OFF
OFF
ON
ON
OFF
3.2V
AMD K6-266/300
Dual Voltage
OFF
ON
OFF
OFF
OFF
2.2V
Cyrix 6x86
Single Voltage
ON
ON
ON
ON
OFF
3.52V
Cyrix 6x86L
Dual Voltage
OFF
OFF
OFF
ON
OFF
2.8V
Cyrix M2
Dual Voltage
ON
OFF
OFF
ON
OFF
2.9V
IDT C6
Single Voltage
OFF
ON
ON
ON
OFF
3.45V
