Asus P2B-B - Manual (Page 16)

16 ASUS P2B-B User’s Manual
III. INSTALLATION
Jumpers
III. INST
ALLA
TION
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/Celeron
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:
(CPU BUS Freq.) (Freq. Multiple)
Intel CPU Model Freq. Ratio BUS F. FS0 FS1 FS2 FS3 BF0 BF1 BF2 BF3
Pentium II 450MHz 4.5x 100MHz [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [1-2] [2-3]
Pentium II 400MHz 4.0x 100MHz [1-2] [1-2] [1-2] [2-3] [2-3] [2-3] [1-2] [2-3]
Pentium II 350MHz 3.5x 100MHz [1-2] [1-2] [1-2] [2-3] [1-2] [1-2] [2-3] [2-3]
Pentium II/Celeron 366MHz 5.5x 66MHz [1-2] [1-2] [2-3] [2-3] [1-2] [1-2] [1-2] [2-3]
Pentium II/Celeron 333MHz 5.0x 66MHz [1-2] [1-2] [2-3] [2-3] [2-3] [1-2] [1-2] [2-3]
Pentium II/Celeron 300MHz 4.5x 66MHz [1-2] [1-2] [2-3] [2-3] [1-2] [2-3] [1-2] [2-3]
Pentium II/Celeron 266MHz 4.0x 66MHz [1-2] [1-2] [2-3] [2-3] [2-3] [2-3] [1-2] [2-3]
Pentium II/Celeron 233MHz 3.5x 66MHz [1-2] [1-2] [2-3] [2-3] [1-2] [1-2] [2-3] [2-3]
WARNING! Frequencies above 100MHz exceed the specifications for the on-
board Intel Chipset and are not guaranteed to be stable.
4. CPU External (BUS) Frequency Selection (FS0, FS1, FS2, FS3)
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).
5. CPU to BUS Frequency Ratio (BF0, BF1, BF2, BF3)
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.
CPU Bus Frequency
CPU Core:Bus Frequency Multiple
P2B-B CPU Settings
75.0MHz
37.5MHz 83.0MHz
41.6MHz 66.8MHz
33.4MHz 100.3MHz
33.4MHz
103MHz
34.3MHz
CPU
PCI CPU
PCI CPU
PCI CPU
PCI CPU
PCI
FS0 FS1 FS2 FS3
1
2
3
FS0 FS1 FS2 FS3
1
2
3
FS0 FS1 FS2 FS3
1
2
3
FS0 FS1 FS2 FS3
1
2
3
FS0 FS1 FS2 FS3
1
2
3
FS0 FS1 FS2 FS3
1
2
3
FS0 FS1 FS2 FS3
1
2
3
FS0 FS1 FS2 FS3
1
2
3
FS0 FS1 FS2 FS3
1
2
3
FS0 FS1 FS2 FS3
1
2
3
110.0MHz
36.7MHz
112.0MHz
37.3MHz
105.0MHz
35.0MHz
115.0MHz
38.3MHz
120.0MHz
40.0MHz
CPU
PCI CPU
PCI CPU
PCI CPU
PCI CPU
PCI
FS0 FS1 FS2 FS3
1
2
3
124.0MHz
31.0MHz
CPU
PCI
FS0 FS1 FS2 FS3
1
2
3
133.0MHz
33.3MHz
CPU
PCI
FS0 FS1 FS2 FS3
1
2
3
140.0MHz
35.0MHz
CPU
PCI
FS0 FS1 FS2 FS3
1
2
3
150.0MHz
37.5MHz
CPU
PCI
FS0 FS1 FS2 FS3
1
2
3
133.0MHz
44.3MHz
CPU
PCI
BF1
BF2
BF0
BF3
2.0x(2/1)
1 2 3
2.5x(75/2)
1 2 3
3.0x(3/1)
1 2 3
3.5x(7/2)
1 2 3
5.5x(11/2)
1 2 3
5.0x(5/1)
1 2 3
4.5x(9/2)
1 2 3
4.0x(4/1)
1 2 3
WARNING! PCI frequencies above 33MHz exceed the specifications for PCI
cards and are not guaranteed to be stable.