Asus P4B ASUS P4B motherboard user guide, 3.CPU frequency selection (SWITCH Switches 5-9)

3.CPU frequency selection (SWITCH Switches 5-9)

This option tells the clock generator what frequency to send the CPU. This allows the selection of the CPU’s external frequency (or Bus Clock). The BUS Clock multiplied by the Frequency Multiple equals the CPU’s internal frequency (the advertised CPU speed).

To select the CPU external frequency using the DIP switches, ensure that the JEN jumper is set to jumper mode.

P4B

SWITCH

2 1	ON	2 1	ON	2 1	ON	2 1	ON
3		3		3		3
4		4		4		4
5		5		5		5
6		6		6		6
7		7		7		7
8		8		8		8
10 9		10 9		10 9		10 9

CPU 100MHz 105MHz 111MHz 120MHz

AGP 67MHz 70MHz 74MHz 80MHz

PCI 33MHz 35MHz 37MHz 40MHz

2 1	ON	2 1	ON	2 1	ON
3		3		3
4		4		4
5		5		5
6		6		6
7		7		7
8		8		8
10 9		10 9		10 9

P4B CPU	CPU 120MHz		125MHz	133MHz
External Frequency Selection	AGP	60MHz	62MHz	66MHz
	PCI	30MHz	31MHz	33MHz

Figure 2-24 CPU Frequency Settings

Set the CPU frequency only to the recommended settings. Frequencies other than the recommended CPU bus frequencies are not guaranteed to be stable.

ASUS P4B motherboard user guide 2-19