Asus P/I-XP55T2P4 User Manual page 16

7. CPU External Clock (BUS) Frequency Selection (JP9, JP10)
These jumpers tells the clock generator what frequency to send to the CPU to 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 (JP12, JP13)
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
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 100MHz
AMD 90MHz
AMD 75MHz
*Cyrix 166+ 133MHz
*The only Cyrix CPU that is supported on this motherboard is labeled Cyrix 6x86
P166+ but must be Revision 2.7 and later. Look on the underside of the CPU for the
serial number. The number should read G8DC6620A or larger.
10
III. INSTALLATION
1
2
3
50MHz
CPU External Clock (BUS) Frequency Selection
1
2
3
1.5 x
CPU : BUS Frequency Ratio (1.5x, 2.0x, 2.5x, 3.0x)
Intel, AMD, or Cyrix
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 50MHz
2.0x 66MHz
ASUS P/I-XP55T2P4 User's Manual
1 1
2 2
3 3
55MHz 60MHz 66MHz
1 1
2 2
3 3
2.0 x 2.5 x 3.0 x
CPU's as follows:
(BUS Freq.) (Freq. Ratio)
JP10 JP9 JP13 JP12
[2-3] [1-2] [2-3] [1-2]
[2-3] [1-2] [2-3] [2-3]
[1-2] [2-3] [2-3] [2-3]
[2-3] [1-2] [1-2] [2-3]
[1-2] [2-3] [1-2] [2-3]
[2-3] [1-2] [1-2] [1-2]
[1-2] [2-3] [1-2] [1-2]
[2-3] [2-3] [1-2] [1-2]
[2-3] [1-2] [1-2] [1-2]
[1-2] [2-3] [1-2] [1-2]
[2-3] [2-3] [1-2] [1-2]
[2-3] [1-2] [1-2] [2-3]
1
2
3
1
2
3