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18 ASUS P3V133 User’s Manual
3. HARDWARE SETUP
Motherboard Settings
3. H/W SETUP
5. CPU:PCI Bus Frequency Multiple Selection (MS0, MS1)
This option sets the frequency ratio between the CPU bus frequency and the PCI
bus frequency. The default sets the CPU bus frequency to be twice of the PCI
bus frequency.
P3V133 CPU:PCI Frequency Multiple Selection
123
123
MS0
MS1
MS0
MS1
CPU Bus Frequency
=PCI Bus Frequency X2
(Default)
CPU Bus Frequency
=PCI Bus Frequency X4
123
123
MS0
MS1
MS0
MS1
CPU Bus Frequency
=PCI Bus Frequency X3
(Reserved)
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P3V133
IMPORTANT: The CPU:PCI Bus Frequency Multiple must be set in conjunc-
tion with the CPU Bus Frequency. Otherwise, your system will not start. For
example, if your CPU’s Bus Frequency is 66MHz, the CPU:PCI Bus Frequency
Multiple should be 2-3 (MS0), 2-3 (MS1), unless otherwise indicated. See table
on opposite page for the combinations.
4. CPU Bus Frequency Selection (FS0, FS1, FS2, FS3)
This option tells the clock generator what frequency to send to the CPU, DRAM, and
motherboard chipset. 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 Inter-
nal frequency (the advertised CPU speed).
P3V133 CPU External
Frequency Selection
105MHz
35MHz
123
103.00MHz
34.33MHz
123
100.30MHz
33.43MHz
123
83.30MHz
41.65MHz
123
75.0MHz
37.5MHz
123
FS1
FS2
FS0
FS3
66.8MHz
33.4MHz
123
CPU
PCI
CPU
PCI
110.00MHz
36.67MHz
112.00MHz
37.33MHz
115.00MHz
38.33MHz
120MHz
40MHz
124MHz
31MHz
124.00MHz
41.33MHz
123 123 123 123 123123
FS1
FS2
FS0
FS3
133.0MHz
33.3MHz
133.00MHz
44.33MHz
140MHz
35MHz
150.0MHz
37.5MHz
123 123 123 123
FS1
FS2
FS0
FS3
CPU
PCI
R
P3V133