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SW2 Switch
This switch is used to select the internal CPU frequency by defining the CPU
Bus Frequency / CPU Frequency ratio. If the processor is upgraded, the
ratio might have to be changed to adapt to the new processor.
The following table includes some examples of the settings to use for
different processor speeds:
Processor Speeds
CPU Frequency 100 MHz
CPU Frequency 120 MHz
CPU Frequency 133 MHz
CPU Frequency 150 MHz
CPU Frequency 166 MHz
The default settings for Switch 2 and Jumper J7 depend on the
particular HP Vectra 500 Series PC model.
CPU Bus Frequency Jumper
This jumper (J7) defines the CPU bus frequency. The following illustration
shows how to set the desired bus frequency.
50 MHz
2 System Board - (SiS Chipset) (Part Number: D4051-63001)
Switch Block SW2
Position
Ratio
1
2
CPU Bus
Frequency
2 / 3
OFF
OFF
1 / 2
ON
OFF
1 / 2
ON
OFF
2 / 5
ON
ON
2 / 5
ON
ON
60 MHz
66 MHz
Jumper J7 Settings
Pins Shorted
66 MHz
3 - 4
60 MHz
1 - 3
66 MHz
3 - 4
60 MHz
1 - 3
66 MHz
3 - 4
SiS Chipset
39
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