Asus P/I-XP55TVP4 User Manual page 16

4. CPU External (BUS) Frequency Selection (FS0, FS1, FS2)
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).
5. 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.
BUS Frequency Ratio
Set the jumpers by the Internal speed of the Intel, AMD, or Cyrix 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
AMD PR133 100MHz
AMD PR120 90MHz
AMD PR100 100MHz
AMD P90 90MHz
AMD P75 75MHz
*Cyrix 166+ 133MHz
*NOTE: Only Cyrix Revision 2.7 or later is supported on this motherboard. See next page for revision
identification. Bootup screen will show 6x86-P166+ -S CPU at 133MHz with the Cyrix
166+ installed on this motherboard.
10
III. INSTALLATION
1 2 3
BF0
BF1
1.5 (3/2)
50MHZ
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
1.5x 66MHz
1.5x 60MHz
1.5x 66MHz
1.5x 60MHz
1.5x 50MHz
2.0x 66MHz
ASUS P/I-XP55TVP4 User's Manual
1 2 3 1 2 3
2.0 (2/1) 3.0 (3/1)
1 1 1
2 2 2
3 3 3
60MHZ 55MHZ
(BUS Freq.)
FS2 FS1 FS0
[1-2] [2-3] [2-3]
[1-2] [2-3] [2-3]
[2-3] [2-3] [1-2]
[1-2] [2-3] [2-3]
[2-3] [2-3] [1-2]
[1-2] [2-3] [2-3]
[2-3] [2-3] [1-2]
[2-3] [2-3] [2-3]
[1-2] [2-3] [2-3]
[2-3] [2-3] [1-2]
[1-2] [2-3] [2-3]
[2-3] [2-3] [1-2]
[2-3] [2-3] [2-3]
[1-2] [2-3] [2-3]
1 2 3
2.5 (5/2)
1
2
3
66.6MHZ
(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]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[2-3] [1-2]