AOpen AP5VM-TBL User Manual
Appendix A
Jumper Setting Summary
CPU Voltage Select
JP7
1-2
3-4
5-6
7-8
9-10
11-12
JP9
1-2 &
3-4
Open
CPU Core Voltage (Vcore)
3.45V (Intel P54C or IDT C6)
3.52V (Cyrix or AMD K5)
2.9V (AMD K6-166/200 or Cyrix M2)
2.8V (MMX P55C)
3.2V (AMD K6-233)
2.1V (Reserved)
JP10
Open
1-2 &
3-4
JP11
1-2 &
3-4
Open
Warning: The heat dissipation of Intel PP/MT-233Hz, AMD
K6-200/233MHz exceed the original design of this mainboard.
Please make sure that you have installed CPU fan properly if
Intel PP/MT-233 or AMD K6-200/233 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.
JP12
Open
1-2 &
3-4
CPU Type (Vcpuio)
Single Voltage CPU
Vcpuio = Vcore (default)
Dual Voltage CPU
Vcpuio = Vio (PP/MT P55C)
JP8
1-2
3-4
I/O Voltage (Vio)
3.45V (default)
3.52V
CPU Vcore Vio Vcpuio JP7 JP8 JP9 JP10 JP11 JP12
A-1
Jumper Table Summary
Type
Intel
P54C
Intel
MMX
(P55C)
AMD K5
(Single
voltage)
AMD
K6166/200
AMD
K6-233
Cyrix
6x86
Cyrix
6x86L
Cyrix M2 2.9V 3.45V Vio 5-6 1-2 Open 1-2,
IDT C6 3.45V 3.45V Vcore 1-2 1-2 1-2,
CPU Frequency Select
3.45V 3.45V Vcore 1-2 1-2 1-2,
3-4
2.8V 3.45V Vio 7-8 1-2 Open 1-2,
3.52V 3.45V Vcore 3-4 1-2 1-2,
3-4
2.9V 3.45V Vio 5-6 1-2 Open 1-2,
3.2V 3.45V Vio 9-10 1-2 Open 1-2,
3.52V 3.45V Vcore 3-4 1-2 1-2,
3-4
2.8V 3.45V Vio 7-8 1-2 Open 1-2,
3-4
Open 1-2,
3-4
Open 1-2,
3-4
Open 1-2,
3-4
Open 1-2,
3-4
Open 1-2,
3-4
Open 1-2,
3-4
Open 1-2,
3-4
Open 1-2,
3-4
Open 1-2,
3-4
Open
3-4
Open
3-4
3-4
Open
3-4
3-4
Open
JP1
1-2
2-3
2-3
1-2
Intel
Pentium
P54C 75 75MHz = 1.5x 50MHz 1-2 & 1-2 2-3 & 2-3
P54C 90 90MHz = 1.5x 60MHz 1-2 & 1-2 1-2 & 2-3
P54C 100 100MHz = 1.5x 66MHz 1-2 & 1-2 2-3 & 1-2
P54C 120 120MHz = 2x 60MHz 2-3 & 1-2 1-2 & 2-3
P54C 133 133MHz = 2x 66MHz 2-3 & 1-2 2-3 & 1-2
P54C 150 150MHz = 2.5x 60MHz 2-3 & 2-3 1-2 & 2-3
P54C 166 166MHz = 2.5x 66MHz 2-3 & 2-3 2-3 & 1-2
P54C 200 200MHz = 3x 66MHz 1-2 & 2-3 2-3 & 1-2
Intel
Pentium
JP2
1-2
1-2
2-3
2-3
CPU Frequency
Ratio
1.5x (3.5x)
2x
2.5x (1.75x)
3x
CPU Core
Frequency
CPU Core
Frequency
JP3
2-3
1-2
2-3
Ratio External Bus
Clock
Ratio External
Bus Clock
JP4
CPU External
Clock
2-3
2-3
1-2
JP1 & JP2 JP3 & JP4
JP1 & JP2 JP3 & JP4
50MHz
60MHz
66MHz
A-2
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