Asus P4B-LS Motherboard DIY Troubleshooting Guide - Page 41

CPU Frequency Settings

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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. SWITCH ON 1 2 3 4 5 6 7 8 9 10 ON 1 2 3 4 5 6 7 8 9 10 ON 1 2 3 4 5 6 7 8 9 10 ON 1 2 3 4 5 6 7 8 9 10 CPU 100MHz 105MHz 111MHz 120MHz PCI 33MHz 35MHz 37MHz 40MHz ® P4B-LS ON 1 2 3 4 5 6 7 8 9 10 ON 1 2 3 4 5 6 7 8 9 10 ON 1 2 3 4 5 6 7 8 9 10 P4B-LS CPU External Frequency Selection CPU 120MHz 125MHz 133MHz PCI 30MHz 31MHz 33MHz 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-LS motherboard user guide 2-19

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ASUS P4B-LS 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-LS
SWITCH
P4B-LS CPU
External Frequency Selection
100MHz
ON
12345
6 7 8 910
105MHz
ON
12345
6 7 8 910
111MHz
ON
12345
6 7 8 910
120MHz
ON
12345
6 7 8 910
33MHz
35MHz
37MHz
40MHz
120MHz
ON
12345
6 7 8 910
125MHz
ON
12345
6 7 8 910
133MHz
ON
12345
6 7 8 910
30MHz
31MHz
33MHz
CPU
PCI
CPU
PCI