Supero SUPER S2DG2, User'S And Bios Manual

Page: 36 / 96

SUPER S2DG2/S2DGU/S2DGE/S2DGR
Manual
2-4
3 2 1
C P U C o r e /
Bus Ratio
3.0
3.5
4.0
4.5
5.0
5.5
6.0
J B 1
O N
O F F
O N
O F F
O N
O F F
O N
J B 2
O F F
O F F
O N
O N
O F F
O F F
O N
J B 3
O N
O N
O F F
O F F
O F F
O F F
O N
J B 4
O N
O N
O N
O N
O N
O N
O F F
Table 2-1
Pentium II/III Speed Selection
C o n n e c t o r
P i n s
J u m p e r
C a p
Setting
Pins 1-2
shorted
Example of 4.0
CPU Core/Bus Ratio
JB1 JB2 JB3 JB4
ON ON OFF ON
2-3 Explanation and
Diagram of Jumper/
Connector
To modify the operation of the moth-
erboard, jumpers can be used to
choose between optional settings.
Jumpers create shorts between two
pins to 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 as shown in 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 the proper settings of
JB1, JB2, JB3 and JB4.
400 MHz = 100 MHz x 4.0
CPU Speed = Bus Freq. x Ratio