Asus P2L97A III.INSTALLATION, WARNING, Internal, External, CPU Bus Frequency, 3.CPU Bus Frequency (FS0, FS1, FS2), 4.CPU Core:BUS Frequency Multiple (BF0, BF1, BF2, BF3)

INSTALLATION .III

Jumpers

III.INSTALLATION3.CPU Bus Frequency (FS0, FS1, FS2)

This option tells the clock generator what frequency to send to the CPU. This allows the selection of the CPU’s External frequency (or BUS Clock). The BUS Clock multiplied by the BUS Ratio equals the CPU’s Internal frequency (the advertised CPU speed).

4.CPU Core:BUS Frequency Multiple (BF0, BF1, BF2, BF3)

This option sets the frequency ratio between the Internal frequency of the CPU and the CPU’s External frequency. These must be set in conjunction with the CPU Bus Frequency.

BF0	BF1	BF2 BF3	BF0	BF1 BF2 BF3	BF0	BF1 BF2 BF3	BF0	BF1	BF2 BF3	BF0 BF1 BF2 BF3
1		1			1		1			1
2		2			2		2			2
3		3			3		3			3
	2.0x(2/1)			3.5x(7/2)	4.0x(4/1)		4.5x(9/2)			5.0x(5/1)
CPU Core:Bus Frequency Ratio
FS2	FS1	FS0	FS2	FS1 FS0	FS2	FS1 FS0	FS2	FS1	FS0
1		1			1		1
2		2			2		2
3		3			3		3
60MHz			66MHz		75MHz		83MHz

CPU Bus Frequency

WARNING! Frequencies above 66Mhz exceed the specifications for the onboard Intel Chipset and are not guaranteed to be stable.

Intel Pentium II Processor in an SEC Cartridge

(233-333MHz 256/512KB L2 Cache)

Set the jumpers by the Internal speed of your processor as follows:

CPU Model	Freq.				(BUS Freq.)				(Freq.	Ratio)
		Ratio	BUS F.	FS0		FS1	FS2	BF0	BF1	BF2	BF3
Intel Pentium II	300MHz	4.5x	66MHz	[1-2]		[1-2]	[1-2]	[1-2]	[2-3]	[1-2]	[2-3]
Intel Pentium II	266MHz	4.0x	66MHz	[1-2]		[1-2]	[1-2]	[2-3]	[2-3]	[1-2]	[2-3]
Intel Pentium II	233MHz	3.5x	66MHz	[1-2]		[1-2]	[1-2]	[1-2]	[1-2]	[2-3]	[2-3]

NOTES: Overclocking your processor is not recommended. It may result in a slower speed. Voltage Regulator Output Selection (VID) is not needed for the Pentium II processor because it sends a VID signal directly to the onboard power controller.

14 ASUS P2L97A User’s Manual