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3. CPU frequency selection (SWITCH Switches 5-9)
This option tells the clock generator what frequency to send the CPU.
This allows the selection of the CPU's external frequency (or Bus
Clock). The BUS Clock multiplied by the Frequency Multiple equals the
CPU's internal frequency (the advertised CPU speed).
To select the CPU external frequency using the DIP switches, ensure
that the JEN jumper is set to jumper mode.
P4B CPU
External Frequency Selection
Figure 2-24
CPU Frequency Settings
Set the CPU frequency only to the recommended settings.
Frequencies other than the recommended CPU bus frequencies are
not guaranteed to be stable.
ASUS P4B motherboard user guide
SWITCH
CPU
AGP
PCI
®
P4B
CPU
AGP
PCI
100MHz
105MHz
111MHz
67MHz
70MHz
74MHz
33MHz
35MHz
37MHz
120MHz
125MHz
133MHz
60MHz
62MHz
66MHz
30MHz
31MHz
33MHz
120MHz
80MHz
40MHz
2-19
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