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.

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

PSBSEL1

DSW1

 

 

5

 

 

4

 

 

3

 

ON

1 2

 

 

 

3

2

 

2

1

 

 

CPU

DSW1

 

 

(Default)

P4B533-V CPU Frequency Settimg

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.

 

DSW1

 

5

 

5

 

5

 

5

 

5

 

 

4

 

4

 

4

 

4

 

4

 

 

 

3

 

3

 

3

 

3

 

3

 

 

ON

1 2

ON

1 2

ON

1 2

ON

1 2

ON

1 2

 

CPU 100MHz 101MHz 105MHz 107MHz 109MHz

 

AGP

66MHz

66MHz

70MHz

71MHz

72MHz

 

PCI

33MHz

33MHz

35MHz

35MHz

36MHz

 

 

 

5

 

5

 

5

 

5

 

5

 

 

 

4

 

4

 

4

 

4

 

4

 

 

 

3

 

3

 

3

 

3

 

3

 

 

ON

1 2

ON

1 2

ON

1 2

ON

1 2

ON

1 2

 

CPU 114MHz 117MHz 120MHz 133MHz 135MHz

 

AGP

76MHz

78MHz

80MHz

66MHz

67MHz

P4B533-V

PCI

38MHz

39MHz

40MHz

33MHz

33MHz

 

 

 

 

5

 

5

 

5

 

5

 

5

 

 

 

4

 

4

 

4

 

4

 

4

 

 

 

3

 

3

 

3

 

3

 

3

 

 

ON

1 2

ON

1 2

ON

1 2

ON

1 2

ON

1 2

P4B533-V CPU

CPU 137MHz 141MHz 143MHz 150MHz 166MHz

AGP

68MHz

70MHz

71MHz

75MHz

66MHz

External Frequency SelectionPCI

34MHz

35MHz

36MHz

37MHz

33MHz

ASUS P4B533-V motherboard user guide

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Page 43
Image 43
Asus P4B533-V manual Processor system bus selection 3-pin PSBSEL1, CPU external frequency selection DSW1 Switches