Asus P/I-XP6NP5 6.CPU to BUS Frequency Ratio (JP10, JP11, JP12, JP13), 5.CPU External Clock (BUS) Frequency Selection (JP8, JP9)

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