6 Technical Information

System Board Connectors and Switches

The settings for different processors at different speeds are a combination of the settings of switches 1, 2, 3, 4 and 7.

Pentium processor

Switch1

Switch 2

Switch 3

Switch 4

Switch 7

 

 

 

 

 

 

CPU Frequency 75 MHz

Closed

Closed

Open

Open

Open

CPU bus Frequency 50 MHz

 

 

 

 

 

PCI Frequency 25 MHz

 

 

 

 

 

AT Frequency 8.33 MHz

 

 

 

 

 

 

 

 

 

 

 

CPU Frequency 90 MHz

Closed

Open

Open

Open

Closed

CPU bus Frequency 60 MHz

 

 

 

 

 

PCI Frequency 30 MHz

 

 

 

 

 

AT Frequency 7.5 MHz

 

 

 

 

 

 

 

 

 

 

 

CPU Frequency 100 MHz

Open

Closed

Open

Open

Closed

CPU bus Frequency 66 MHz

 

 

 

 

 

PCI Frequency 33 MHz

 

 

 

 

 

AT Frequency 8.25 MHz

 

 

 

 

 

 

 

 

 

 

 

CPU Frequency 120 MHz

Closed

Open

Closed

Open

Closed

CPU bus Frequency 60 MHz

 

 

 

 

 

PCI Frequency 30 MHz

 

 

 

 

 

AT Frequency 7.5 MHz

 

 

 

 

 

 

 

 

 

 

 

CPU Frequency 133 MHz

Open

Closed

Closed

Open

Closed

CPU bus Frequency 66 MHz

 

 

 

 

 

PCI Frequency 33 MHz

 

 

 

 

 

AT Frequency 8.25 MHz

 

 

 

 

 

 

 

 

 

 

 

The following processor speeds have been announced by Intel.

Pentium processor

Switch 1

Switch 2

Switch 3

Switch 4

Switch 7

 

 

 

 

 

 

CPU Frequency 150 MHz

Closed

Open

Closed

Closed

Closed

CPU bus Frequency 60 MHz

 

 

 

 

 

PCI Frequency 30 MHz

 

 

 

 

 

AT Frequency 7.5 MHz

 

 

 

 

 

 

 

 

 

 

 

CPU Frequency 166 MHz

Open

Closed

Closed

Closed

Closed

CPU bus Frequency 66 MHz

 

 

 

 

 

PCI Frequency 33 MHz

 

 

 

 

 

AT Frequency 8.25 MHz

 

 

 

 

 

 

 

 

 

 

 

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