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14 ASUS P2L97A User’s Manual
III. INSTALLATION
Jumpers
III. INSTALLATION
CPU Bus Frequency
CPU Core:Bus Frequency Ratio
5.0x(5/1)4.5x(9/2)4.0x(4/1)3.5x(7/2)2.0x(2/1)
BF2
BF3
BF1
BF0
1
2
3
BF2
BF3
BF1
BF0
1
2
3
BF2
BF3
BF1
BF0
1
2
3
BF2
BF3
BF1
BF0
1
2
3
BF2
BF3
BF1
BF0
1
2
3
83MHz
FS0
FS1
FS2
1
2
3
75MHz
FS0
FS1
FS2
1
2
3
66MHz
FS0
FS1
FS2
1
2
3
60MHz
FS0
FS1
FS2
1
2
3
3. CPU Bus Frequency (FS0, FS1, FS2)
This option tells the clock generator what frequency to send to the CPU. 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 frequency (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.
Set the jumpers by the Internal speed of your processor as follows:
(BUS Freq.) (Freq. Ratio)
CPU Model Freq. Ratio BUS F. FS0 FS1 FS2 BF0 BF1 BF2 BF3
Intel Pentium II 300MHz 4.5x 66MHz [1-2] [1-2] [1-2] [1-2] [2-3] [1-2] [2-3]
Intel Pentium II 266MHz 4.0x 66MHz [1-2] [1-2] [1-2] [2-3] [2-3] [1-2] [2-3]
Intel Pentium II 233MHz 3.5x 66MHz [1-2] [1-2] [1-2] [1-2] [1-2] [2-3] [2-3]
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.
WARNING! Frequencies above 66Mhz exceed the specifications for the onboard
Intel Chipset and are not guaranteed to be stable.
Intel Pentium II Processor in an SEC Cartridge
(233-333MHz 256/512KB L2 Cache)