User`s manual

14 ASUS P2B User’s Manual
III. INSTALLATION
Jumpers
III. INSTALLATION
BF2
BF1
BF3
CPU Core:BUS Frequency Multiple
P2B CPU
R
BF0
BF2
BF1
BF3
BF0
BF2
BF1
BF3
BF0
BF2
BF1
BF3
BF0
BF2
BF1
BF3
BF0
BF2
BF1
BF3
BF0
BF2
BF1
BF3
BF0
2.0x (2/1)
2.5x (5/2) 3.0X (3/1) 3.5X (7/2) 4.0X (4/1) 4.5X (9/2) 5.0X (5/1)
FS1 FS2 FS0
1
2
3
FS1 FS2 FS0
1
2
3
FS1 FS2 FS0
1
2
3
2
1
3
2
1
3
2
1
3
2
1
3
2
1
3
2
1
3
FS1 FS2 FS0
1
2
3
FS1 FS2 FS0
1
2
3
FS1 FS2 FS0
103MHz
33.4MHz
CPU External Clock (BUS) Frequency Selection
CPU
PCI
66.8MHz
33.4MHz
75MHz
37.5MHz
83.3MHz
41.65MHz
100.2MHz
33.3MHz
112MHz
37.3MHz
BF2
BF1
BF3
BF0
BF2
BF1
BF3
BF0
BF2
BF1
BF3
BF0
BF2
BF1
BF3
BF0
BF2
BF1
BF3
BF0
BF2
BF1
BF3
BF0
5.5x (11/2)
6.0x (6/1) 6.5X (13/2) 7.0X (7/1) 7.5X (15/2) 8.0X (8/1)
2
1
3
2
1
3
2
1
3
2
1
3
2
1
3
3. 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).
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.
Intel Pentium II Processor in an SEC Cartridge
(233-400MHz 256/512KB L2 Cache)
WARNING! Frequencies above 100Mhz exceed the specifications for the on-
board Intel Chipset and are not guaranteed to be stable.
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.
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 400MHz 4.0x 100MHz [1-2] [1-2] [1-2] [2-3] [2-3] [1-2] [2-3]
Intel Pentium II 350MHz 3.5x 100MHz [1-2] [1-2] [1-2] [1-2] [1-2] [2-3] [2-3]
Intel Pentium II 300MHz 3.0x 100MHz [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [2-3]
Intel Pentium II 333MHz 5.0x 66MHz [1-2] [1-2] [2-3] [2-3] [1-2] [1-2] [2-3]
Intel Pentium II 300MHz 4.5x 66MHz [1-2] [1-2] [2-3] [1-2] [2-3] [1-2] [2-3]
Intel Pentium II 266MHz 4.0x 66MHz [1-2] [1-2] [2-3] [2-3] [2-3] [1-2] [2-3]
Intel Pentium II 233MHz 3.5x 66MHz [1-2] [1-2] [2-3] [1-2] [1-2] [2-3] [2-3]