Asus VX97 ASUS VX97 User’s Manual, 5.CPU to BUS Frequency Ratio (BF0, BF1), 4.CPU External (BUS) Frequency Selection (FS0, FS1, FS2)

III.INSTALLATION

4.CPU External (BUS) Frequency Selection (FS0, FS1, FS2)

These jumpers tell 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'sInternal frequency (the advertised CPU speed).

5.CPU to BUS Frequency Ratio (BF0, BF1)

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 (BUS) Frequency Selection.

	FS2 FS1 FS0	FS2 FS1 FS0	FS2	FS1 FS0	FS2 FS1 FS0	FS2 FS1 FS0
		1	1	1	1	1
		2	2	2	2	2
		3	3	3	3	3
	50MHz	55MHz	60MHz		66MHz	75MHz
	CPU External Clock (BUS) Frequency Selection
		BF0 BF1	BF1	BF0	BF0 BF1	BF0 BF1
Complete Names:	P54C/K5	1.5x(3/2)	2.0x(2/1)		2.5x(5/2)	3.0x(3/1)
Intel Pentium P54C, P55C-MMX
AMD K5, K6	P55C/K6/MX	3.5X(7/2)	2.0x(2/1)		2.5x(5/2)	3.0x(3/1)
IBM/Cyrix 6x86, 6x86MX	IBM/Cyrix 6x86	3.0x(3/1)	2.0x(2/1)		1.0x(1/1)	4.0x(4/1)

CPU : BUS Frequency Ratio

Set the jumpers by the Internal speed of the Intel, AMD, or Cyrix CPU as follows:

					(BUS Freq.)			(Freq. Ratio)
CPU Model			BUS Freq.	FS2		FS1	FS0	BF1	BF0
	Freq.	Ratio
Intel Pentium	233MHz	3.5x	66MHz	[2-3]		[1-2]	[2-3]	[1-2] [1-2]
Intel Pentium	200MHz	3.0x	66MHz	[2-3]		[1-2]	[2-3]	[2-3] [1-2]
Intel Pentium	166MHz	2.5x	66MHz	[2-3]		[1-2]	[2-3]	[2-3] [2-3]
Intel Pentium	150MHz	2.5x	60MHz	[2-3]		[2-3]	[1-2]	[2-3] [2-3]
Intel Pentium	133MHz	2.0x	66MHz	[2-3]		[1-2]	[2-3]	[1-2] [2-3]
Intel Pentium	120MHz	2.0x	60MHz	[2-3]		[2-3]	[1-2]	[1-2] [2-3]
Intel Pentium	100MHz	1.5x	66MHz	[2-3]		[1-2]	[2-3]	[1-2] [1-2]
Intel Pentium	90MHz	1.5x	60MHz	[2-3]		[2-3]	[1-2]	[1-2] [1-2]
Intel Pentium	75MHz	1.5x	50MHz	[2-3]		[2-3]	[2-3]	[1-2] [1-2]
AMD-K6-PR233	233MHz	3.5x	66MHz	[2-3]		[1-2]	[2-3]	[1-2] [1-2]
AMD-K6-PR200	200MHz	3.0x	66MHz	[2-3]		[1-2]	[2-3]	[2-3] [1-2]
AMD-K6-PR166	166MHz	2.5x	66MHz	[2-3]		[1-2]	[2-3]	[2-3] [2-3]
AMD-K5-PR133/100	100MHz	1.5x	66MHz	[2-3]		[1-2]	[2-3]	[1-2] [1-2]
AMD-K5-PR120/90	90MHz	1.5x	60MHz	[2-3]		[2-3]	[1-2]	[1-2] [1-2]
AMD-K5-PR75	75MHz	1.5x	50MHz	[2-3]		[2-3]	[2-3]	[1-2] [1-2]
IBM/Cyrix6x86MX-PR233	200MHz	3.0x	66MHz	[2-3]		[1-2]	[2-3]	[2-3] [1-2]
IBM/Cyrix6x86MX-PR200	166MHz	2.5x	66MHz	[2-3]		[1-2]	[2-3]	[2-3] [2-3]
IBM/Cyrix6x86MX-PR166	150MHz	2.5x	60MHz	[2-3]		[2-3]	[1-2]	[2-3] [2-3]
*Cyrix 166+	133MHz	2.0x	66MHz	[2-3]		[1-2]	[2-3]	[1-2]	[2-3]

*NOTE: Only Cyrix Revision 2.7 or later is supported on this motherboard. Bootup screen will show 6x86-P166+with the Cyrix 166+ installed on this motherboard.

INSTALLATION	(Jumpers)
III.

ASUS VX97 User’s Manual 15