Supero SUPER P6DGE, User'S And Bios Manual

Page: 37 / 98

Chapter 2: Installation
2-5
3 2 1
CPU Core/
Bus Ratio
3.0
3.5
4.0
4.5
5.0
5.5
6.0
JB1
ON
OFF
ON
OFF
ON
OFF
ON
JB2
OFF
OFF
ON
ON
OFF
OFF
ON
JB3
ON
ON
OFF
OFF
OFF
OFF
ON
JB4
ON
ON
ON
ON
ON
ON
OFF
Table 2-1
Pentium II Speed Selection
400 MHz = 100 MHz x 4.0
CPU Speed = Bus Freq. x Ratio
Note: SUPER P6DBU/P6SBU must be running at
100 MHz bus speed to support Pentium II 350/400
MHz processors.
Example of 4.0
CPU Core/Bus Ratio
JB1 JB2 JB3 JB4
ON ON OFF ON
Connector
Pins
Jumper
Cap
Setting
Pin 1-2 short
When removing the Pentium II processor, avoid pressing
down on the motherboard or components. Instead, press
down on the plastic connectors.
!
2-3 Explanation and
Diagram of Jumper/
Connector
To modify the operation of the
motherboard, jumpers can be used
to choose settings. Jumpers cre-
ate shorts between two pins and
change the function of the con-
nector. Pin 1 is identified with a
square.
2-4 Changing the CPU
Speed
To change the CPU speed for a
Pentium II 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 Ra-
tio, refer to Table 2-1 for settings
of JB1, JB2, JB3 and JB4.