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20 ASUS P2B-N User’s Manual
Motherboard Settings
3. H/W SETUP
3. HARDWARE SETUP
5) CPU Bus Frequency Selector (FS0, FS1, FS2)
This option tells the clock generator what frequency to send to the CPU, DRAM, and
AGPset. This allows the selection of the CPU’s External frequency (or BUS Clock).
The Bus Clock multiplied by the Bus Multiple equals the CPU’s Internal frequency
(the advertised CPU speed).
P2B-N CPU Bus Frequency Setting
R
3
21
66.8MHZ
33.1MHZ
3
21
75.0MHZ
37.5MHZ
3
21
83.3MHZ
41.7MHZ
3
21
100.2MHZ
33.3MHZ
3
21
112.0MHZ
37.3MHZ
3
21
103.0MHZ
33.4MHZ
3
21
133.0MHZ
33.3MHZ
PCI
CPU
→
→
→
→
→
FS1
FS2
FS0
PCI
CPU
→
→
→
→
→
FS1
FS2
FS0
6) 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.
P2B-N CPU Core:Bus Frequency Multiple Selection
®
2.5x(5/2)
4.5x(9/2)
2.0x(2/1)
3
2
1
BF1
BF2
BF0
BF3
BF1
BF2
BF0
BF3
BF1
BF2
BF0
BF3
3
2
1
3.5x(7/2)3.0x(3/1)
BF1
BF2
BF0
BF3
BF1
BF2
BF0
BF3
5.0x(5/1)
BF1
BF2
BF0
BF3
5.5x(11/2)
BF1
BF2
BF0
BF3
3
2
1
7.0x(7/1)
BF1
BF2
BF0
BF3
7.5x(15/2)
BF1
BF2
BF0
BF3
4.0x(4/1)
BF1
BF2
BF0
BF3
6.0x(6/1)
BF1
BF2
BF0
BF3
6.5x(13/2)
BF1
BF2
BF0
BF3
8.0x(8/1)
BF1
BF2
BF0
BF3