6VX7B-4X Motherboard
7
CPU Speed Setup
The system bus speed is selectable at 66,100,133MHz and Auto. The user can select the
system bus speed (SW1) and change the DIP switch (SW2) selection to set up the CPU speed
for 500MHz – 1GHz processor.
SW1:
O: ON, X: OFF
CPU
PCI CLK
1
2
3
4
5
6
Auto
33.3
X X X X O O
66 33.3 O O X X X X
75 37.5 O O O X X X
83
41.6
O O X O X X
100
33.3
O X X X X X
112
37.3
O X O X X X
124
31 X X X O X X
133
33.3 X X X X X X
140
35 X X O O X X
150
37.5 X X O X X X
0
0
0
0
The CPU speed must match with the frequency RATIO. It will cause system hanging
up if the frequency RATIO is higher than that of CPU.
SW2:
DIP SWITCH
FREQ. RATIO
1
2
3
4
X3 O X O O
X3.5 X X O O
X4 O O X O
X4.5 X O X O
X5 O X X O
X5.5 X X X O
X6 O O O X
X6.5 X O O X
X7 O X O X
X7.5 X X O X
X8 O O X X
X8.5 O X O O
X9 X X O O
X9.5 X O O O
X10 X O X X
X10.5
O O X O
X11 O X X X
X11.5
X O X O
X12 O X X O
X13 X X X O
