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75KAV/75KAV-X
2-5-3 BUS RATIO SELECT (BY SW2 DIP1-4/JP17)
•
The AMD Athlon and Duron processors provide four Frequency ID signals
(FID) respectively via DIP 1 to DIP4 of SW3 for the system controller to
specify the SYSTCLK multiplier at which the processor core operates.
Normally, the multiplier (or bus ratio) is detected automatically by FID.
Therefore, if the processor does not support the function, then "Bus Ratio"
can not be selected.
•
When JP17 is "ON", LED "LED1" will be on. It means that bus ratio
select function is enabled. So as long as your CPU supports bus ratio
select function, then the bus ratio can be selected by users.
FAN1
1
3
JP9
SOCKET A
5.5x
6.5x
7.5x
8.5x
9.5x
10.5x
11.5x
*12.5x
or
13.0x
5 4 3 2 1
4 3 2 1
DIP
ON
DIP
ON
ATX POWER
SSF1
SW1
SW2
1
3
JP17
JP10
1
3
1
3
JP11
Clock
Generator
VIA
KT-133A
SW2 DIP1 ~ DIP4 SETTING
4 3 2 1
6.0x
(Default)
DIP
ON
DIP
4 3 2 1
7.0x
DIP
ON
DIP
4 3 2 1
8.0x
DIP
ON
DIP
4 3 2 1
9.0x
DIP
ON
DIP
4 3 2 1
10.0x
DIP
ON
DIP
4 3 2 1
11.0x
DIP
ON
DIP
4 3 2 1
12.0x
DIP
DIP
ON
4 3 2 1
14.0x
DIP
ON
DIP
26
*Note:
Setting of multipler 12.
5x or above will depend
on the type of CPU on
board.
JP17
4 3 2 1
ON
Bus ratio detected
4 3 2 1
by FID (Auto)
1
3
ON
4 3 2 1
ON
Bus ratio selected
4 3 2 1
by SW2 DIP 1-4
1
3
ON
4 3 2 1
ON
JP17 allows you to
4 3 2 1
enable or disable
the "Frequency
Ratio Select"
ON
function.
4 3 2 1
ON
4 3 2 1
ON
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