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ASUS P4B motherboard user guide
2-19
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).
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.
To select the CPU external frequency using the DIP switches, ensure
that the JEN jumper is set to jumper mode.
P4B
®
SWITCH
P4B CPU
External Frequency Selection
100MHz
ON
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105MHz
ON
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111MHz
ON
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120MHz
ON
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67MHz 70MHz 74MHz 80MHz
33MHz 35MHz 37MHz 40MHz
120MHz
ON
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125MHz
ON
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133MHz
ON
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60MHz 62MHz 66MHz
30MHz 31MHz 33MHz
CPU
AGP
PCI
CPU
AGP
PCI