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CPU Host Frequency hardware Setting (JP39)
Normally, CPU FSB auto-detecting by BIOS, System wil assign
proper frequency to CPU, when JP39 set to default position.
We strongly advise novice users not to modify the original setting of the
CPU host frequency, for setting an incorrect value may damage your CPU.
For experienced users, the AV64 mainboard provides an alternative Hard-
Configure function to adjust your CPU host frequency manually.
Insert mini-jumper caps properly on JP39 to reach desired CPU
Host Frequency, as shown in the following table.
2
System Clock
(JP39)
1-2
3-4
5-6
7-8
66 MHz
OFF
OFF
ON
ON
75 MHz
ON
OFF
ON
ON
83 MHz
OFF
ON
ON
ON
100 MHz
OFF
OFF
OFF
ON
112 MHz
ON
OFF
OFF
ON
133 MHz (Default)
OFF
OFF
OFF
OFF
140 MHz
ON
ON
OFF
OFF
150 MHz
ON
OFF
OFF
OFF
Note:
75, 83 MHz are over-clock
usage for 66MHz base processor,
112~103MHz are over-clock
usage for 100MHz base processor,
and 140MHz~150MHz are over-
clock usage for 133 MHz base
processor. However, over-clocking
is not a recommended practice.