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14 ASUS P2B-D2 User’s Manual
III. INSTALLATION
Jumpers
III. INSTALLATION
4. CPU Bus Frequency (FS0, FS1, FS2)
This option tells the clock generator what frequency to send to the CPU, DRAM, and
440BX AGPset. 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 fre-
quency (the advertised CPU speed).
5. CPU Core:BUS Frequency Multiple (BF0, BF1, BF2, BF3)
This option sets the frequency multiple between the Internal frequency of the
CPU and the CPU’s External frequency. These must be set in conjunction with
the CPU Bus Frequency.
CPU Bus Frequency
CPU Core:Bus Frequency Multiple
P2B-D2 CPU Settings
FS1
FS2
FS0
50MHz
123
FS1
FS2
FS0
66MHz
123
FS1
FS2
FS0
123
FS1
FS2
FS0
123
FS1
FS2
FS0
123
75MHz 83MHz 100MHz
2.0x (2/1) 2.5x (5/2) 3.0x (3/1) 3.5x (7/2) 4.0x (4/1)
BF1
BF2
BF0
BF3
BF1
BF2
BF0
BF3
3
2
1
BF1
BF2
BF0
BF3
3
2
1
BF1
BF2
BF0
BF3
3
2
1
BF1
BF2
BF0
BF3
3
2
1
4.5x (9/2) 5.0x (5/1)
BF1
BF2
BF0
BF3
3
2
11
BF1
BF2
BF0
BF3
3
2
3
2
1
Set the jumpers by the Internal speed of your processor as follows:
(BUS Freq.) (Freq. Ratio)
Intel CPU Model Freq. Ratio BUS F. FS2 FS1 FS0 BF3 BF2 BF1 BF0
Pentium II 450MHz 4.5x 100MHz [1-2] [1-2] [1-2] [1-2] [2-3] [1-2] [2-3]
Pentium II 400MHz 4.0x 100MHz [1-2] [1-2] [1-2] [1-2] [2-3] [1-2] [1-2]
Pentium II 350MHz 3.5x 100MHz [1-2] [1-2] [1-2] [1-2] [1-2] [2-3] [2-3]
Pentium II 333MHz 5.0x 66MHz [2-3] [1-2] [1-2] [1-2] [2-3] [2-3] [1-2]
Pentium II 300MHz 4.5x 66MHz [2-3] [1-2] [1-2] [1-2] [2-3] [1-2] [2-3]
Pentium II 266MHz 4.0x 66MHz [2-3] [1-2] [1-2] [1-2] [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)
WARNING! Frequencies above 100MHz exceed the specifications for the on-
board Intel Chipset and are not guaranteed to be stable.