Motherboard Installation
Page
14
INTEL PENTIUM P54C/P55C CPU
Internal CPU
Speed (MHz)
External Bus
Speed (MHz)
FQ3
FQ2
FQ1
Frequency
Ratio
BF2
BF1
BF0
100
66
[1-2]
[1-2]
[1-2]
1.5x
1-2
1-2
1-2
120
60
[1-2]
[1-2]
[2-3]
2.0x
1-2
1-2
2-3
133
66
[1-2]
[1-2]
[1-2]
2.0x
1-2
1-2
2-3
150
60
[1-2]
[1-2]
[2-3]
2.5x
1-2
2-3
2-3
166
66
[1-2]
[1-2]
[1-2]
2.5x
1-2
2-3
2-3
200
66
[1-2]
[1-2]
[1-2]
3.0x
1-2
2-3
1-2
233
66
[1-2]
[1-2]
[1-2]
3.5x
1-2
1-2
1-2
CYRIX/IBM 6x86 M1/M2 CPU
P150+
60
[1-2]
[1-2]
[2-3]
2.0x
1-2
1-2
2-3
P166+
66
[1-2]
[1-2]
[1-2]
2.0x
1-2
1-2
2-3
PR200
75
[1-2]
[2-3]
[1-2]
2.0x
1-2
1-2
2-3
PR233
66
[1-2]
[1-2]
[1-2]
3.0x
1-2
2-3
1-2
PR233
75
[1-2]
[2-3]
[1-2]
2.5x
1-2
2-3
2-3
PR266
66
[1-2]
[1-2]
[1-2]
3.5x
1-2
1-2
1-2
PR300
66
[1-2]
[1-2]
[1-2]
3.5x
1-2
1-2
1-2
PR300
75
[1-2]
[2-3]
[1-2]
3.0x
1-2
2-3
1-2
PR333
75
[1-2]
[2-3]
[1-2]
3.5x
1-2
1-2
1-2
PR333
83
[2-3]
[1-2]
[2-3]
3.0x
1-2
2-3
1-2
AMD-K5/K6 CPU
PR100
66
[1-2]
[1-2]
[1-2]
1.5x
1-2
1-2
1-2
PR166/K6-166
66
[1-2]
[1-2]
[1-2]
2.5x
1-2
2-3
2-3
PR200
66
[1-2]
[1-2]
[1-2]
3.0x
1-2
2-3
1-2
PR233
66
[1-2]
[1-2]
[1-2]
3.5x
1-2
1-2
1-2
PR266
66
[1-2]
[1-2]
[1-2]
4.0x
2-3
1-2
2-3
PR300
66
[1-2]
[1-2]
[1-2]
4.5x
2-3
2-3
2-3
PR333
66
[1-2]
[1-2]
[1-2]
5.0x
2-3
2-3
1-2
IDT-C6
150
50
[2-3]
[2-3]
[2-3]
3.0x
1-2
2-3
1-2
150
75
[1-2]
[2-3]
[1-2]
2.0x
1-2
1-2
2-3
180
60
[1-2]
[1-2]
[2-3]
3.0x
1-2
2-3
1-2
200
66
[1-2]
[1-2]
[1-2]
3.0x
1-2
2-3
1-2
225
75
[1-2]
[2-3]
[1-2]
3.0x
1-2
2-3
1-2
CPU Voltage Selection
CPU type
Voltage Requirements
Intel Pentium P54C, Cyrix/IBM M1 6x86, AMD-K5,IDT-
C6
3.4V (STD) / 3.5V (VRE)
Intel Pentium P55C, Cyrix/IBM M1 6x86L
Cyrix/IBM 6x86MX, MII, K6-PR166/200
AMD-K6-PR233
AMD-K6-PR266, PR300
2.8V
2.9V
3.2V
2.2V