User Guide

Jumper Table Summary
A-2
INTEL P54C Single Voltage 1-2 3.45V
INTEL MMX
P55C
Dual Voltage 7-8 2.8V
AMD K5 Single Voltage 3-4 3.52V
AMD K6-166/200 Dual Voltage 5-6 2.9V
AMD K6-233 Dual Voltage 9-10 3.2V
Cyrix 6x86 Single Voltage 3-4 3.52V
Cyrix 6x86L Dual Voltage 7-8 2.8V
Cyrix M2 Dual Voltage 5-6 2.9V
IDT C6 Single Voltage 1-2 3.45V
Selecting the CPU Frequency
JP3
1-2
1-2
1-2
1-2
2-3
2-3
2-3
2-3
JP1
1-2
2-3
2-3
1-2
2-3
2-3
1-2
1-2
JP2
1-2
1-2
2-3
2-3
1-2
2-3
2-3
1-2
CPU Frequency
Ratio
1.5x (3.5x)
2x
2.5x (1.75x)
3x
4x
4.5x
5x
5.5x
JP6
1-2
1-2
2-3
2-3
JP4
1-2
2-3
1-2
2-3
JP5
2-3
1-2
2-3
1-2
CPU External
Clock
60MHz
66MHz
75MHz
83.3MHz
Note: JP3 is reserved for future CPU. It is NC pin (no connection)
for current CPU on the market. It should be no harm to connect to
1-2 or 2-3. If you find any unstable problem, please try to remove
the jumper cap, and leave it Open.
Note: Intel PP/MT MMX 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.
Warning: INTEL TX chipset supports only 60/66MHz external
CPU bus clock, the 75/83.3MHz settings are for internal test only,
set to 75/83.3MHz exceeds the specification of TX chipset, which
may cause serious system damage.
Warning: Cyrix 6x86 P200+ uses 75MHz external clock, the
jumper setting shown on the table below is for user's convenient.
It may cause serious system damage to use 75MHz clock.
INTEL CPU Core Ratio External JP3 & JP1 & JP2 JP6 & JP4 & JP5