Asus TX97 User Manual page 18

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's Internal 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.
Set the jumpers by the Internal speed of the Intel, AMD, or Cyrix CPU as follows:
CPU Model Freq.
Intel Pentium 200MHz
Intel Pentium 166MHz
Intel Pentium 150MHz
Intel Pentium 133MHz
Intel Pentium 120MHz
Intel Pentium 100MHz
Intel Pentium 90MHz
Intel Pentium 75MHz
AMD-K5-PR133 100MHz
AMD-K5-PR120 90MHz
AMD-K5-PR100 100MHz
AMD-K5-PR90 90MHz
AMD-K5-PR75 75MHz
*Cyrix 166+ 133MHz
*NOTE: Only Cyrix Revision 2.7 or later is supported on this motherboard. See next page for revision
identification. Bootup screen will show 6x86-P166+ -S CPU at 133MHz with the Cyrix
166+ installed on this motherboard.
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III. INSTALLATION
1
2
3
50MHz
CPU External Clock (BUS) Frequency Selection
1
2
3
Intel
1.5 x
Cyrix (M1)
3.0 x
CPU : BUS Frequency Ratio
Ratio BUS Freq.
3.0x 66MHz
2.5x 66MHz
2.5x 60MHz
2.0x 66MHz
2.0x 60MHz
1.5x 66MHz
1.5x 60MHz
1.5x 50MHz
1.5x 66MHz
1.5x 60MHz
1.5x 66MHz
1.5x 60MHz
1.5x 50MHz
2.0x 66MHz
ASUS TX97 User's Manual
1 1
2 2
3 3
55MHz 60MHz 66MHz
1 1
2 2
3 3
2.0 x 2.5 x 3.0 x
2.0 x 3.0 x 2.0 x
(BUS Freq.)
FS0 FS1 FS2
[1-2] [2-3] [2-3]
[1-2] [2-3] [2-3]
[2-3] [2-3] [2-3]
[1-2] [2-3] [2-3]
[2-3] [2-3] [2-3]
[1-2] [2-3] [2-3]
[2-3] [2-3] [2-3]
[2-3] [1-2] [2-3]
[1-2] [2-3] [2-3]
[2-3] [2-3] [2-3]
[1-2] [2-3] [2-3]
[2-3] [2-3] [2-3]
[2-3] [1-2] [2-3]
[1-2] [2-3] [2-3]
1
2
3
1
2
3
(Freq. Ratio)
BF1 BF0
[2-3] [1-2]
[2-3] [2-3]
[2-3] [2-3]
[1-2] [2-3]
[1-2] [2-3]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [2-3]