User Guide

Jumper Table Summary
A-2
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
CPU Core
Frequency
Ratio External
Bus
Clock
JP1 & JP2 JP3 & JP4 JP13
P54C 75 75MHz = 1.5X 50MHz 1-2 & 1-2 2-3 & 2-3 1-2 & 5-6
P54C 90 90MHz = 1.5x 60MHz 1-2 & 1-2 1-2 & 2-3 1-2 & 3-4
P54C 100 100MHz = 1.5x 66MHz 1-2 & 1-2 2-3 & 1-2 3-4
P54C 120 120MHz = 2x 60MHz 2-3 & 1-2 1-2 & 2-3 1-2 & 3-4
P54C 133 133MHz = 2x 66MHz 2-3 & 1-2 2-3 & 1-2 3-4
P54C 150 150MHz = 2.5x 60MHz 2-3 & 2-3 1-2 & 2-3 1-2 & 3-4
P54C 166 166MHz = 2.5x 66MHz 2-3 & 2-3 2-3 & 1-2 3-4
P54C 200 200MHz = 3x 66MHz 1-2 & 2-3 2-3 & 1-2 3-4
Intel
Pentium
CPU Core
Frequency
Ratio External
Bus
Clock
JP1 & JP2 JP3 & JP4 JP13
PP/MT 150 150MHz = 2.5x 60MHz 2-3 & 2-3 1-2 & 2-3 1-2 & 3-4
PP/MT 166 166MHz = 2.5x 66MHz 2-3 & 2-3 2-3 & 1-2 3-4
PP/MT 200 200MHz = 3x 66MHz 1-2 & 2-3 2-3 & 1-2 3-4
PP/MT 233 200MHz = 3.5x 66MHz 1-2 & 1-2 2-3 & 1-2 3-4