Asus TX97-E 6.CPU to BUS Frequency Ratio (BF0, BF1), 5.CPU External (BUS) Frequency Selection (FS0, FS1, FS2)

III.INSTALLATION

5.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).

6.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.

INSTALLATION .III (Jumpers)

Complete Names:

Intel Pentium P54C, P55C-MMX

AMD K5, K6

Cyrix M1, M2

1	2 3	1	2 3	1	2 3	1	2 3	1	2 3
FS2
FS1
FS0
50MHz		55MHz		60MHz		66MHz		75MHz
CPU External Clock (BUS) Frequency Selection
		1	2 3	1	2 3	1	2 3	1	2 3
	BF0
	BF1
P54C/K5		1.5x(3/2)		2.0x(2/1)		2.5x(5/2)		3.0x(3/1)
P55C/K6/M2		3.5X(7/2)		2.0x(2/1)		2.5x(5/2)		3.0x(3/1)
Cyrix M1		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	Freq.	Ratio	BUS Freq.	FS2		FS1	FS0	BF0	BF1
Intel Pentium	200MHz	3.0x	66MHz	[2-3]		[2-3]	[1-2]	[1-2] [2-3]
Intel Pentium	166MHz	2.5x	66MHz	[2-3]		[2-3]	[1-2]	[2-3] [2-3]
Intel Pentium	150MHz	2.5x	60MHz	[2-3]		[2-3]	[2-3]	[2-3] [2-3]
Intel Pentium	133MHz	2.0x	66MHz	[2-3]		[2-3]	[1-2]	[2-3] [1-2]
Intel Pentium	120MHz	2.0x	60MHz	[2-3]		[2-3]	[2-3]	[2-3] [1-2]
Intel Pentium	100MHz	1.5x	66MHz	[2-3]		[2-3]	[1-2]	[1-2] [1-2]
Intel Pentium	90MHz	1.5x	60MHz	[2-3]		[2-3]	[2-3]	[1-2] [1-2]
Intel Pentium	75MHz	1.5x	50MHz	[2-3]		[1-2]	[2-3]	[1-2] [1-2]
AMD-K6-PR233	233MHz	3.5x	66MHz	[2-3]		[2-3]	[1-2]	[1-2] [1-2]
AMD-K6-PR200	200MHz	3.0x	66MHz	[2-3]		[2-3]	[1-2]	[1-2] [2-3]
AMD-K6-PR166	166MHz	2.5x	66MHz	[2-3]		[2-3]	[1-2]	[2-3] [2-3]
AMD-K5-PR133	100MHz	1.5x	66MHz	[2-3]		[2-3]	[1-2]	[1-2] [1-2]
AMD-K5-PR120	90MHz	1.5x	60MHz	[2-3]		[2-3]	[2-3]	[1-2] [1-2]
AMD-K5-PR100	100MHz	1.5x	66MHz	[2-3]		[2-3]	[1-2]	[1-2] [1-2]
AMD-K5-PR90	90MHz	1.5x	60MHz	[2-3]		[2-3]	[2-3]	[1-2] [1-2]
AMD-K5-PR75	75MHz	1.5x	50MHz	[2-3]		[1-2]	[2-3]	[1-2] [1-2]
*Cyrix 166+	133MHz	2.0x	66MHz	[2-3]		[2-3]	[1-2]	[2-3]	[1-2]

*NOTE: Only Cyrix Rev 2.7 or later is supported on this motherboard. See next page for revision identifi- cation. Bootup screen will show 6x86-P166+with the Cyrix 166+ installed on this motherboard.

18 ASUS TX97-E User’s Manual