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ASUS P4B266 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).
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.
P4B266
®
SWITCH
P4B266 CPU
External Frequency Selection
CPU
AGP
PCI
CPU
AGP
PCI
ON
12345678910
100MHz
67MHz
33MHz
ON
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105MHz
70MHz
35MHz
ON
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111MHz
74MHz
37MHz
ON
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120MHz
80MHz
40MHz
ON
12345678910
133MHz
66MHz
33MHz
ON
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125MHz
62MHz
31MHz
ON
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120MHz
60MHz
30MHz