INSTALLATION .III (Jumpers)

III.INSTALLATION

5.CPU External Clock (BUS) Frequency Selection (JP8, JP9)

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 (JP10, JP11, 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 Clock (BUS) Frequency Selection.

JP9

JP8

 

 

 

 

JP9

JP8

 

60MHz

 

 

 

 

66MHz

 

CPU External Clock (BUS) Frequency Selection

JP13

JP12

JP11

JP10

JP13

JP12

1JP1

JP10

JP10 JP11 JP12 JP13

 

2.0x

 

 

3.0x

 

4.0x

JP13

JP12

JP11

JP10

JP13

JP12

JP11

JP10

 

2.5x 3.5x

CPU : BUS Frequency Ratio (2.0x, 2.5x, 3.0x, 3.5x, 4.0x)

Set the jumpers by the Internal speed of the Intel CPU as follows:

 

 

 

 

 

 

 

 

 

Internal

 

 

 

 

BUS Freq.

CPU to BUS Freq. Ratio

 

 

 

 

Ratio

External

JP9

JP8

JP13 JP12 JP11 JP10

200MHz

3.0x

66MHz

[2-3]

[1-2]

[short] [open] [short] [short]

180MHz

3.0x

60MHz

[1-2]

[2-3]

[short] [open] [short] [short]

166MHz

2.5x

66MHz

[2-3]

[1-2]

[open] [short] [short] [short]

150MHz

2.5x

60MHz

[1-2]

[2-3]

[open] [short] [short] [short]

10

ASUS P/I-XP6NP5 User’s Manual