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CPU Settings
Internal Clock
External Clock
Clock Factor
Intel Pentium CPUs (Including MMX)
100 MHz
66MHz
x1.5
133MHz
66MHz
x2.0
166MHz
66MHz
x2.5
200MHz
66MHz
x3.0
233MHz
66MHz
x3.5
Cyrix/IBM CPUs
6X86 & 6X86L-
P166+(133MHz)
66MHz
x2.0
P200+(150MHz)
75MHz
x2.0
6X86MX/MII-
PR166(133MHz)
66MHz
x2.0
PR200(166MHz)
66MHz
x2.5
PR233(200MHz)
66MHz
x3.0
PR200(150MHz)
75MHz
x2.0
PR233(188MHz)
75MHz
x2.5
PR300(225MHz)
75MHz
x3.0
PR233(166MHz)
83MHz
x2.0
PR266(208MHz)
83MHz
x2.5
PR333(250MHz)
83MHz
x3.0
AMD CPUs
K5
PR100(100MHz)
66MHz
x1.5
PR133(133MHz)
66MHz
x2.0
PR166(166MHz)
66MHz
x2.5
K6
PR166(166MHz)
66MHz
x2.5
PR200(200MHz)
66MHz
x3.0
PR233(233MHz)
66MHz
x3.5
PR266(266MHz)
66MHz
x4.0
PR300(300MHz)
66MHz
x4.5
K6/2
PR333(333MHz)
95MHz
x3.5
PR300(300MHz)
100MHz
x3.0
PR350(350MHz)
100MHz
x3.5
Ÿ
Since the internal clock speed of the CPU is supposed to operate at is fixed, the two
factors, external clock and clock factor, are the variables. The CPU manufacturer or
vendor’s information should tell you what these factors should be.