Asus P/I-P55T2P4S User Manual page 16

5. CPU External (BUS) Frequency Selection (FS1, FS2)
These jumpers tells 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 ad-
vertised CPU speed).
6. CPU to BUS Frequency Ratio (BF0, BF1)
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.
Set the jumpers by the Internal speed of the Intel, Cyrix, or AMD CPU as follows:
CPU Model Freq.
Intel Pentium 200MHz
Intel Pentium 166MHz
Intel Pentium 150MHz
Intel Pentium 133MHz
Intel Pentium 120MHz
Intel Pentium 100MHz
Intel Pentium 90MHz
Intel Pentium 75MHz
Cyrix 166+ 133MHz
AMD 100MHz
AMD 90MHz
AMD 75MHz
10
III. INSTALLATION
1 2 3
FS2 FS2
FS1 FS1
50MHz
CPU External Clock (BUS) Frequency Selection
1 1
2 2
3 3
1.5 x 2.0 x
CPU : BUS Frequency Ratio (1.5x, 2.0x, 2.5x, 3.0x)
Ratio (BUS Freq.)
3.0x 66MHz
2.5x 66MHz
2.5x 60MHz
2.0x 66MHz
2.0x 60MHz
1.5x 66MHz
1.5x 60MHz
1.5x 50MHz
2.0x 66MHz
1.5x 66MHz
1.5x 60MHz
1.5x 50MHz
ASUS P/I-P55T2P4S User's Manual
1 2 3 1 2 3 1 2 3
FS2 FS2
FS1 FS1
55MHz 60MHz 66MHz
1 1
2 2
3 3
2.5 x 3.0 x
(BUS Frequency)
FS2 FS1
[1-2] [2-3]
[1-2] [2-3]
[2-3] [1-2]
[1-2] [2-3]
[2-3] [1-2]
[1-2] [2-3]
[2-3] [1-2]
[2-3] [2-3]
[1-2] [2-3]
[1-2] [2-3]
[2-3] [1-2]
[2-3] [2-3]
(Freq. Ratio)
BF0 BF1
[1-2] [2-3]
[2-3] [2-3]
[2-3] [2-3]
[2-3] [1-2]
[2-3] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[2-3] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[1 -2] [1-2]