User Guide

Hardware Installation
2-10
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.
Caution: Following table are possible settings of current
CPU available on the market. The correct setting may
vary because of new CPU product, refer to your CPU
specification for more details.
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
Pentium
CPU Core
Frequency
Ratio External
Bus Clock
S1 S2 S3 JP4 & JP5 & JP6
P54C 90 90MHz = 1.5x 60MHz OFF OFF OFF 1-2 & 2-3 & 1-2
P54C 100 100MHz = 1.5x 66MHz OFF OFF OFF 2-3 & 1-2 & 1-2
P54C 120 120MHz = 2x 60MHz ON OFF OFF 1-2 & 2-3 & 1-2
P54C 133 133MHz = 2x 66MHz ON OFF OFF 2-3 & 1-2 & 1-2
P54C 150 150MHz = 2.5x 60MHz ON ON OFF 1-2 & 2-3 & 1-2
P54C 166 166MHz = 2.5x 66MHz ON ON OFF 2-3 & 1-2 & 1-2
P54C 200 200MHz = 3x 66MHz OFF ON OFF 2-3 & 1-2 & 1-2
INTEL
Pentium
MMX
CPU Core
Frequency
Ratio External
Bus Clock
S1 S2 S3 JP4 & JP5 & JP6
PP/MT 150 150MHz = 2.5x 60MHz ON ON OFF 1-2 & 2-3 & 1-2
PP/MT 166 166MHz = 2.5x 66MHz ON ON OFF 2-3 & 1-2 & 1-2
PP/MT 200 200MHz = 3x 66MHz OFF ON OFF 2-3 & 1-2 & 1-2
PP/MT 233 233MHz = 3.5x 66MHz OFF OFF OFF 2-3 & 1-2 & 1-2
AMD K5 CPU Core
Frequency
Ratio External
Bus Clock
S1 S2 S3 JP4 & JP5 & JP6
PR90 90MHz = 1.5x 60MHz OFF OFF OFF 1-2 & 2-3 & 1-2
PR100 100MHz = 1.5x 66MHz OFF OFF OFF 2-3 & 1-2 & 1-2
PR120 90MHz = 1.5x 60MHz OFF OFF OFF 1-2 & 2-3 & 1-2
PR133 100MHz = 1.5x 66MHz OFF OFF OFF 2-3 & 1-2 & 1-2
PR166 116MHz = 1.75x 66MHz ON ON OFF 2-3 & 1-2 & 1-2