Asus P I-P55TP4N User Manual page 16

5. CPU External (BUS) Frequency Selection (JP26, 27, 28)
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 advertised CPU speed).
6. CPU to BUS Frequency Ratio (JP14, 15)
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
Internal (CPU)
166MHz
150MHz
133MHz
120MHz
100MHz
90MHz
75MHz
10
III. INSTALLATION
1
2
3
66MHz
CPU External Clock (BUS) Frequency Selection
JP14
JP15
1.5 x 2.0 x
CPU : BUS Frequency Ratio (1.5x, 2.0x, 2.5x, 3.0x)
Ratio External JP28 JP27 JP26 JP14 JP15
2.5x 66MHz [2-3]
2.5x 60MHz [1-2]
2.0x 66MHz [2-3]
2.0x 60MHz [1-2]
1.5x 66MHz [2-3]
1.5x 60MHz [1-2]
1.5x 50MHz [2-3]
P/I-P55TP4N User's Manual
1 1
2
2
3 3
60MHz 50MHz
JP14 JP14 JP14
JP15 JP15 JP15
3.0 x
2.5 x
Intel
CPU as follows:
[1-2] [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]
[short] [short]
[short] [short]
[open] [short]
[open] [short]
[open] [open]
[open] [open]
[open] [open]