Table of Contents
Advertisement
Jumper Table Summary
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.
Selecting the CPU Frequency
S1
S2
S3
CPU Frequency
Ratio
OFF
OFF
OFF
1.5x (3.5x)
ON
OFF
OFF
2x
ON
ON
OFF
2.5x (1.75x)
OFF
ON
OFF
3x
ON
OFF
ON
4x
ON
ON
ON
4.5x
OFF
ON
ON
5x
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.
Warning: Although you may set 75MHz x 2 for Cyrix MX-PR200
and 83.3MHz x 2 for Cyrix MX-PR233, note that 75/83.3MHz
settings may cause serious system damage.
INTEL
CPU Core
C-2
JP4
JP5
2-3
1-2
1-2
1-2
1-2
2-3
2-3
1-2
Ratio
External
S1
JP6
CPU External
Clock
1-2
60MHz
1-2
66MHz
1-2
75MHz
2-3
83.3MHz
S2
S3
JP4 & JP5 & JP6
Advertisement
Table of Contents
