Asus P/I-P55T2P4 User Manual page 16

7. CPU External (BUS) Frequency Selection (JP8, JP9, JP10)
These jumpers tell the clock generator what frequency to send to the CPU. These
allow the selection of the CPU's External frequency (or BUS Clock). The BUS Clock
times the BUS Ratio equals the CPU's Internal frequency (the advertised CPU speed).
8. CPU to BUS Frequency Ratio (JP11, JP12)
These jumpers set the frequency ratio between the Internal frequency of the CPU
and the External frequency (called the BUS Clock) within the CPU. These must
be set together with the above jumpers CPU External (BUS) Frequency Selection.
Complete Names:
Intel Pentium P54C, P55C-MMX
AMD K5, K6
IBM/Cyrix 6x86, 6x86MX
Set the jumpers by the Internal speed of the Intel, AMD, IBM, or Cyrix CPU as follows:
CPU Model
Intel Pentium
Intel Pentium
Intel Pentium
Intel Pentium
Intel Pentium
Intel Pentium
Intel Pentium
Intel Pentium
Intel Pentium
AMD-K6-PR233
AMD-K6-PR200
AMD-K6-PR166
AMD-K5-PR133/100
AMD-K5-PR120/90
AMD-K5-PR75
IBM/Cyrix 6x86MX-PR233
IBM/Cyrix 6x86MX-PR200
IBM/Cyrix 6x86MX-PR166
*IBM/Cyrix6x86-PR166+ 133MHz
*NOTE: Only IBM or Cyrix Rev 2.7 or later is supported on this motherboard (see next page). Bootup
screen will show 6x86-P166+ with the Cyrix PR166+ installed on this motherboard.
10
III. INSTALLATION
1
2
3
50MHz 55MHz
CPU External Clock (BUS) Frequency Selection
P54C/K5
P55C/K6/MX
IBM/Cyrix 6x86
CPU : BUS Frequency Ratio
Freq. Ratio B. Freq.
233MHz 3.5x 66MHz
200MHz 3.0x 66MHz
166MHz 2.5x 66MHz
150MHz 2.5x 60MHz
133MHz 2.0x 66MHz
120MHz 2.0x 60MHz
100MHz 1.5x 66MHz
90MHz 1.5x 60MHz
75MHz 1.5x 50MHz
233MHz 3.5x 66MHz
200MHz 3.0x 66MHz
166MHz 2.5x 66MHz
100MHz 1.5x 66MHz
90MHz 1.5x 60MHz
75MHz 1.5x 50MHz
200MHz 3.0x 66MHz
166MHz 2.5x 66MHz
150MHz 2.5x 60MHz
2.0x 66MHz
ASUS P/I-P55T2P4 User's Manual
1
1
2
2
3
3
60MHz 66MHz
1 1
2
2
3
3
1.5x(3/2) 2.0x(2/1) 2.5x(5/2)
3.5X(7/2) 2.0x(2/1) 2.5x(5/2)
3.0x(3/1) 2.0x(2/1) 1.0x(1/1)
(BUS Freq.)
JP10 JP9 JP8
[2-3] [1-2] [2-3]
[2-3] [1-2] [2-3]
[2-3] [1-2] [2-3]
[1-2] [2-3] [2-3]
[2-3] [1-2] [2-3]
[1-2] [2-3] [2-3]
[2-3] [1-2] [2-3]
[1-2] [2-3] [2-3]
[2-3] [2-3] [2-3]
[2-3] [1-2] [2-3]
[2-3] [1-2] [2-3]
[2-3] [1-2] [2-3]
[2-3] [1-2] [2-3]
[1-2] [2-3] [2-3]
[2-3] [2-3] [2-3]
[2-3] [1-2] [2-3]
[2-3] [1-2] [2-3]
[1-2] [2-3] [2-3]
[2-3] [1-2] [2-3]
1 1
2
2
3 3
75MHz
1 1
2 2
3 3
3.0x(3/1)
3.0x(3/1)
4.0x(4/1)
(Freq. Ratio)
JP12 JP11
[1-2] [1-2]
[2-3] [1-2]
[2-3] [2-3]
[2-3] [2-3]
[1-2] [2-3]
[1-2] [2-3]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[2-3] [1-2]
[2-3] [2-3]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[2-3] [1-2]
[2-3] [2-3]
[2-3] [2-3]
[1-2] [2-3]