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ASUS P2B-L/P2B-S/P2B-LS User’s Manual 15
III. INSTALLATION
R
CPU Bus Frequency
CPU Core:Bus Frequency Multiple
2.5x (5/2)2.0x (2/1)
BF2
BF1
BF3
BF0
FS2
FS1
FS0
P2B-L/S/LS CPU Settings
3.0x (3/1) 3.5x (7/2) 4.0x (4/1) 4.5x (9/2) 5.0x (5/1) 5.5x (11/2) 6.0x (6/1)
2
3
1 2
3
1 2
3
1 2
3
1 2
3
1 2
3
1 2
3
12
3
1 2
3
1
112MHz
2
3
1
103MHz
2
3
1
100MHz
2
3
1
83.3MHz
2
3
1
75MHz
2
3
1
66.8MHz
2
3
1
50MHz
2
3
1
6. CPU Bus Frequency (FS0, FS1, FS2)
This option tells the clock generator what frequency to send to the CPU, DRAM, and
chipset. 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 ad-
vertised CPU speed).
7. 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.
WARNING! Frequencies above 100Mhz exceed the specifications for the on-
board Intel Chipset and are not guaranteed to be stable.
Set the jumpers by the Internal speed of your processor as follows:
(BUS Freq.) (Freq. Ratio)
CPU Model Freq. Ratio BUS F. FS2 FS1 FS0 BF3 BF2 BF1 BF0
Intel Pentium II 450MHz 4.5x 100MHz [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [1-2]
Intel Pentium II 400MHz 4.0x 100MHz [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [2-3]
Intel Pentium II 350MHz 3.5x 100MHz [1-2] [1-2] [1-2] [2-3] [2-3] [1-2] [1-2]
Intel Pentium II 333MHz 5.0x 66MHz [2-3] [1-2] [1-2] [2-3] [1-2] [1-2] [2-3]
Intel Pentium II 300MHz 4.5x 66MHz [2-3] [1-2] [1-2] [2-3] [1-2] [2-3] [1-2]
Intel Pentium II 266MHz 4.0x 66MHz [2-3] [1-2] [1-2] [2-3] [1-2] [2-3] [2-3]
Intel Pentium II 233MHz 3.5x 66MHz [2-3] [1-2] [1-2] [2-3] [2-3] [1-2] [1-2]
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.
Intel Pentium II Processor in an SEC Cartridge (233-450MHz)