User`s manual

SUPER P6DGS/P6DGE/P6DGU/P6SGU Manual
2-6
3 2 1
CPU Core/
Bus Ratio
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
JB1
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
JB2
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
JB3
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
JB4
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
Table 2-1
CPU Core/Bus Ratio Selection
400 MHz = 100 MHz x 4.0
CPU Speed = Bus Speed x Ratio
Note: The SUPER P6DGU/P6SGU must be running
at a 100 MHz bus speed for processor speeds of
350/400/450/500/550/600 MHz.
Connector
Pins
Jumper
Cap
Setting
Pin 1-2 short
2-3 Explanation and
Diagram of Jumper/
Connector
To modify the operation of the moth-
erboard, jumpers can be used to
choose settings. Jumpers create
shorts between two pins and change
the function of the connector. Pin 1
is identified with a square.
2-4 Changing the CPU
Speed
To change the CPU speed for a
Pentium II/III processor, change the
jumpers shown on Table 2-1. The
example on the right will show you
which CPU Core/Bus Ratio to use.
The general rule is to divide the CPU
speed by the bus speed (100 MHz).
If you have a 400 MHz CPU, dividing
it by 100 will give you a CPU Core/
BUS Ratio of 4.0. After determining
the CPU Core/Bus Ratio, refer to
Table 2-1 for settings of JB1, JB2,
JB3 and JB4.
Example of 4.0
CPU Core/Bus Ratio
JB1 JB2 JB3 JB4
ON ON OFF ON