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ASUS P4B533-V motherboard user guide
2-17
2. Processor system bus selection (3-pin PSBSEL1)
In jumper mode, the PSBSEL1 jumper allows selection of either the CPU
or the DSW1 to determine the CPU frequency. When set to pins 1-2, the
CPU frequency depends on the CPU system bus (533MHz or 400MHz).
When set to pins 2-3, the CPU frequency depends on whatever is the
setting of DSW1. Refer to the next item for the DSW1 settings.
3. CPU external frequency selection (DSW1 Switches 1-5)
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 JEN1 jumper is set to jumper mode.
P4B533-V
®
DSW1
P4B533-V CPU
External Frequency Selection
CPU
AGP
PCI
114MHz
76MHz
38MHz
117MHz
78MHz
39MHz
120MHz
80MHz
40MHz
133MHz
66MHz
33MHz
135MHz
67MHz
33MHz
100MHz
66MHz
33MHz
101MHz
66MHz
33MHz
105MHz
70MHz
35MHz
107MHz
71MHz
35MHz
109MHz
72MHz
36MHz
137MHz
68MHz
34MHz
141MHz
70MHz
35MHz
143MHz
71MHz
36MHz
150MHz
75MHz
37MHz
166MHz
66MHz
33MHz
ON
12345
ON
12345
ON
12345
ON
12345
ON
12345
CPU
AGP
PCI
ON
12345
ON
12345
ON
12345
ON
12345
ON
12345
ON
12345
ON
12345
ON
12345
ON
12345
ON
12345
CPU
AGP
PCI
When the PSBSEL1 jumper is set to pins 1-2 (CPU), set the DSW1
switches as shown below.
The PSBSEL1 jumper does not work under JumperFree mode.
P4B533-V
®
P4B533-V CPU Frequency Settimg
PSBSEL1
CPU DSW1
(Default)
ON
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DSW1
1
2
3
2