Asus P2B-DS 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.INSTALLATION

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

This option tells the clock generator what frequency to send to the CPU, DRAM, and 440BX AGPset. 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 fre- quency (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.

1	2	3	1	2	3	1	2	3	1	2	3	1	2	3	1	2	3	1	2	3
		FS0			FS0			FS0			FS0			FS0			FS0			FS0
		FS1			FS1			FS1			FS1			FS1			FS1			FS1
		FS2			FS2			FS2			FS2			FS2			FS2			FS2
50MHz			66MHz			75MHz			83MHz			100MHz			103MHz			112MHz
CPU Bus Frequency
1	2	3	1	2	3	1	2	3	1	2	3	1	2	3	1	2	3	1	2	3
		BF3			BF3			BF3			BF3			BF3			BF3
		BF2			BF2			BF2			BF2			BF2			BF2
		BF1			BF1			BF1			BF1			BF1			BF1
		BF0			BF0			BF0			BF0			BF0			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)

P2B-D/DS CPU Settings CPU Core:Bus Frequency Multiple

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.

14 ASUS P2B-D/P2B-DS User’s Manual