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question on rotation direction

J

janissary

Member
this is pretty dumb but .... i have 3 80 mm fans that came with my chenming aluminum case.. should these fans be turning so that air is blown into the cpu or turn so that air is let out of the cpu...

and if its either one can u change the direction by reversing the power connectors???
 
The fan motors are built so they only run in one direction, but since the fan frames are symmetrical (usually), you can simply turn the whole fan around. I go for the front-to-back airflow pattern, seems to work well. So front fans should be intake, and rear fans should be exhaust, by that way of thinking. You probably don't even need any front fans unless your HDD cage is full and you want to focus extra airflow on them... the rear fans will pull air in the front as they push it out the back.
 
If you look on the edge/side of the fan you should seen two arrows. One points the direction of the blad rotation, the other, the direction of the air.
 
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