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[. . . ] [. . . ] Dual Voltage CPU, Vcpuio = Vio, (PP/MT P55C).
CPU Type INTEL P54C INTEL PP/MT AMD K5 (Single voltage) AMD K6 Cyrix 6x86 Cyrix 6x86L
Vcore 3. 45V 2. 8V 3. 52V 2. 9V 3. 52V 2. 8V
Vio 3. 45V 3. 45V 3. 45V 3. 45V 3. 45V 3. 45V
Vcpuio Vcore Vio Vcore Vio Vcore Vio
JP7 1-2 7-8 3-4 5-6 3-4 7-8
JP8 1-2 1-2 1-2 1-2 1-2 1-2
JP9 Closed Open Closed Open Closed Open
JP10 Open Closed Open Closed Open Closed
JP11 Closed Open Closed Open Closed Open
A-1
Jumper Table Summary
Selecting the CPU Frequency
JP1 1-2 2-3 2-3 1-2 JP2 1-2 1-2 2-3 2-3 CPU Frequency Ratio 1. 5x (3. 5x) 2x 2. 5x (1. 75x) 3x JP3 2-3 1-2 2-3 JP4 2-3 2-3 1-2 JP13 1-2 5-6 1-2 3-4 3-4 CPU External Clock 50MHz 60MHz 66MHz
Note: The feature CPU Intel PP/MT 233MHz is using 1. 5x jumper setting for 3. 5x frequency ratio, and AMD PR166 is using 2. 5x setting for 1. 75x frequency ratio. Note: The future CPUs have not been tested by AOpen Quality Test Department. It is possible that this mainboard can not support these future CPUs.
Intel Pentium P54C 75 P54C 90 P54C 100 P54C 120 P54C 133 P54C 150 P54C 166 P54C 200
CPU Core Frequency 75MHz = 90MHz = 100MHz = 120MHz = 133MHz = 150MHz = 166MHz = 200MHz =
Ratio
1. 5X 1. 5x 1. 5x 2x 2x 2. 5x 2. 5x 3x
External Bus Clock 50MHz 60MHz 66MHz 60MHz 66MHz 60MHz 66MHz 66MHz
JP1 & JP2
JP3 & JP4
JP13
1-2 & 1-2 1-2 & 1-2 1-2 & 1-2 2-3 & 1-2 2-3 & 1-2 2-3 & 2-3 2-3 & 2-3 1-2 & 2-3
2-3 & 2-3 1-2 & 2-3 2-3 & 1-2 1-2 & 2-3 2-3 & 1-2 1-2 & 2-3 2-3 & 1-2 2-3 & 1-2
1-2 & 5-6 1-2 & 3-4 3-4 1-2 & 3-4 3-4 1-2 & 3-4 3-4 3-4
Intel Pentium PP/MT 150 PP/MT 166 PP/MT 200 PP/MT 233
CPU Core Frequency 150MHz = 166MHz = 200MHz = 200MHz =
Ratio
2. 5x 2. 5x 3x 3. 5x
External Bus Clock 60MHz 66MHz 66MHz 66MHz
JP1 & JP2
JP3 & JP4
JP13
2-3 & 2-3 2-3 & 2-3 1-2 & 2-3 1-2 & 1-2
1-2 & 2-3 2-3 & 1-2 2-3 & 1-2 2-3 & 1-2
1-2 & 3-4 3-4 3-4 3-4
A-2
Jumper Table Summary
Cyrix 6x86 CPU Core Frequency 100MHz 120MHz = 133MHz = CPU Core Frequency 90MHz = 100MHz = 90MHz = 100MHz = 116MHz = CPU Core Frequency 166MHz = 200MHz = Ratio External Bus Clock 50MHz 60MHz 66MHz External Bus Clock 60MHz 66MHz 60MHz 66MHz 66MHz External Bus Clock 66MHz 66MHz JP1 & JP2 JP3 & JP4 JP13
P120+ P150+ P166+ AMD K5
2x 2x 2x Ratio
1-2 & 1-2 2-3 & 1-2 2-3 & 1-2 JP1 & JP2
2-3 & 2-3 1-2 & 2-3 2-3 & 1-2 JP3 & JP4
1-2 & 5-6 1-2 & 3-4 3-4 JP13
PR90 PR100 PR120 PR133 PR166 AMD K6
1. 5x 1. 5x 1. 5x 1. 5x 1. 75x Ratio
1-2 & 1-2 1-2 & 1-2 1-2 & 1-2 1-2 & 1-2 2-3 & 2-3 JP1 & JP2
1-2 & 2-3 2-3 & 1-2 1-2 & 2-3 2-3 & 1-2 2-3 & 1-2 JP3 & JP4
1-2 & 3-4 3-4 1-2 & 3-4 3-4 3-4 JP13
PR166 PR200
2. 5x 3x
2-3 & 2-3 1-2 & 2-3
2-3 & 1-2 2-3 & 1-2
3-4 3-4
A-3
Jumper Table Summary
Disabling the Onboard Super I/O
JP18 1-2 2-3 Onboard Super I/O Enable (default) Disable
Disabling the PS/2 Mouse
JP20 1-2 2-3 PS/2 Mouse Enable (default) Disable
Clear CMOS
JP14 1-2 2-3 Clear CMOS Normal operation (default) Clear CMOS
Selecting the CPU Burst Mode
JP22 1-2 2-3 CPU Burst Mode Linear (Cyrix) Toggle (Intel/AMD)
A-4 [. . . ] [. . . ]
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