DFI AK76-SN User Manual page 15

2.3 Selecting the CPU Frequency Ratio
3
Ratio 1 2 4
On
5x On On Off
On Off On
5.5x Off
6x On Off Off On
Off Off On
6.5x Off
7x On On On Off
7.5x Off On On Off
On Off
8x On Off
8.5x Off Off On Off
CPU Frequency Ratio Select - SW1
The table above shows the available frequency ratios and their
corresponding DIP switch setting. Make sure SW1 is set correctly
before applying power, otherwise you will not be able to power-on
the system.
Set pin 5 to On if you wish to use the CPU’s default ratio. The
settings on pins 1 to 4 will have no effect. If you wish to manually
select the CPU’ s ratio, set pin 5 to Off then refer to the table for
the appropriate settings.
SW1’ s default
setting.
Ratio 1 2 3 4
On On Off Off
9x
Off
9.5x Off On Off
10x On Off Off Off
Off Off
10.5x Off Off
11x On On On On
On On
11.5x Off On
On
On Off On
12x
On
12.5x Off Off On
Hardware Installation
SW1: Pin 5
On: Auto - the system will run according
to the CPU’s default ratio. Settings
on pins 1 to 4 will have no effect.
Off: Manual - use pins 1, 2, 3 and 4 to
select the desired ratio.
2
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