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SECTION 4
INSTALLING & WORKING WITH SYSTEM COMPONENTS
4.01 MICROPROCESSOR
The VIPer807 board supports the following microprocessors (the maximum internal CPU
clock speed and CPU voltage are indicated):
•
AMD 486DX2SV running at 66 MHz (3.3V);
•
AMD 486DX4SV running at 100 MHz (3.3V);
•
AMD 5x86 running at 133 MHz (3.3V).
This processor is also referred to as a 486DX5;
•
Intel 486DX running at 33 MHz (5V);
•
Intel 486DX2 running at 66 MHz (5V);
•
Intel 486DX4 running at 100 MHz (3.3V);
•
SGS 486DX4V running at 100 MHz (3.3V).
The Math Co-processor is internal to the CPU (Central Processing Unit).
The above processors also have Internal Cache Memory available. Internal Cache Memory
is enabled and configured in the AMIBIOS Setup.
The following jumpers are related to the CPU:
•
W1: Selects the voltage for powering CPU:
- Shorted: 5V,
- Or open: 3.3V.
WARNING:
Incorrect CPU voltage can damage your CPU!
•
W3 and W23: Selects the desired external CPU Bus speed:
- W3 open and W23 pins 3 and 4 shorted:
- Or W3 open and W23 pins 1 and 2 shorted: 33 MHz.
25 MHz,
Installing & Working With System Components
4-1
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