Asus P2B-L, P2B-LS, P2B-S WARNING, External, Internal, Internal, External, BUS Clock, CPU Bus Frequency, 6.CPU Bus Frequency (FS0, FS1, FS2), ASUS P2B-L/P2B-S/P2B-LSUser’s Manual

III.INSTALLATION

6.CPU Bus Frequency (FS0, FS1, FS2)

This option tells the clock generator what frequency to send to the CPU, DRAM, and chipset. 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 ad- vertised CPU speed).

7.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.

1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3

BF3

BF2

BF1

BF0

2.0x (2/1) 2.5x (5/2) 3.0x (3/1) 3.5x (7/2) 4.0x (4/1) 4.5x (9/2) 5.0x (5/1) 5.5x (11/2) 6.0x (6/1)

CPU Core:Bus Frequency Multiple

1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 FS2 FS1 FS0 50MHz 66.8MHz 75MHz 83.3MHz 100MHz 103MHz 112MHz

CPU Bus Frequency

P2B-L/S/LS CPU Settings

WARNING! Frequencies above 100Mhz exceed the specifications for the onboard Intel Chipset and are not guaranteed to be stable.

Intel Pentium II Processor in an SEC Cartridge (233-450MHz)

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

CPU Model	Freq.				(BUS Freq.)				(Freq.	Ratio)
		Ratio	BUS F.	FS2		FS1	FS0	BF3	BF2	BF1	BF0
Intel Pentium II	450MHz	4.5x	100MHz	[1-2] [1-2] [1-2]				[2-3]	[1-2] [2-3] [1-2]
Intel Pentium II	400MHz	4.0x	100MHz	[1-2] [1-2] [1-2]				[2-3]	[1-2] [2-3] [2-3]
Intel Pentium II	350MHz	3.5x	100MHz	[1-2] [1-2] [1-2]				[2-3]	[2-3] [1-2]		[1-2]
Intel Pentium II	333MHz	5.0x	66MHz	[2-3] [1-2] [1-2]				[2-3]	[1-2]	[1-2]	[2-3]
Intel Pentium II	300MHz	4.5x	66MHz	[2-3]		[1-2]	[1-2]	[2-3]	[1-2]	[2-3] [1-2]
Intel Pentium II	266MHz	4.0x	66MHz	[2-3]		[1-2]	[1-2]	[2-3]	[1-2]	[2-3] [2-3]
Intel Pentium II	233MHz	3.5x	66MHz	[2-3]		[1-2]	[1-2]	[2-3]	[2-3] [1-2]		[1-2]

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.

ASUS P2B-L/P2B-S/P2B-LS User’s Manual 15