Asus TX97-XE User Manual page 18

6. 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).
7. 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.
Complete Names:
Intel Pentium P54C, P55C-MMX
AMD K5, K6
Cyrix M1, M2
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-K6-PR233 233MHz
AMD-K6-PR200 200MHz
AMD-K6-PR166 166MHz
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 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
III. INSTALLATION
50MHz
CPU External Clock (BUS) Frequency Selection
P54C/K5
P55C/K6/M2
Cyrix M1
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
3.5x 66MHz
3.0x 66MHz
2.5x 66MHz
1.5x 66MHz
1.5x 60MHz
1.5x 66MHz
1.5x 60MHz
1.5x 50MHz
2.0x 66MHz
ASUS TX97-X User's Manual
1
1 1
2 2 2
3 3 3
55MHz 60MHz
1
1
2 2
3 3
1.5x(3/2) 2.0x(2/1) 2.5x(5/2)
3.5X(7/2) 2.0x(2/1) 2.5x(5/2)
3.0x(3/1) 2.0x(2/1) 1.0x(1/1)
(BUS Freq.)
FS2 FS1 FS0
[2-3] [1-2] [2-3]
[2-3] [1-2] [2-3]
[2-3] [2-3] [1-2]
[2-3] [1-2] [2-3]
[2-3] [2-3] [1-2]
[2-3] [1-2] [2-3]
[2-3] [2-3] [1-2]
[2-3] [2-3] [2-3]
[2-3] [1-2] [2-3]
[2-3] [2-3] [1-2]
[2-3] [1-2] [2-3]
[2-3] [1-2] [2-3]
[2-3] [2-3] [1-2]
[2-3] [1-2] [2-3]
[2-3] [2-3] [1-2]
[2-3] [2-3] [2-3]
[2-3] [1-2] [2-3]
1
2
3
66MHz
1 1
2 2
3 3
3.0x(3/1)
3.0x(3/1)
4.0x(4/1)
(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]
[2-3] [1-2]
[2-3] [2-3]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [1-2]
[1-2] [2-3]