Are My PC Fans Oriented Correctly for Good Airflow?
Asked by
MellowPine42
I'm building my first PC and I'm not sure whether the fans on the bottom, top, and rear are facing the right direction. Based on the photos, can someone confirm which fans should be intake and which should be exhaust? The fans are standard models rather than reverse-flow fans, if that affects the setup.
Answers
The bottom fans are positioned correctly as intakes. Flip the rear fan and the top fans so they pull hot air out of the case. The goal is to create a clear path where fresh air enters from the bottom and warm air exits through the rear and top.
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With standard fans, the bottom fans should bring cool air into the case. The rear fan should be flipped around so it exhausts warm air out the back, and the top fans should generally exhaust air upward. Right now, it looks like all of them may be acting as intakes, which isn’t ideal.
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A common layout is bottom intake, rear exhaust, and top exhaust. If you have three fans mounted on top, you could potentially leave the one closest to the CPU cooler as an intake, but using the top fans as exhaust is usually the simpler setup. You can confirm the direction by feeling which side is pushing air or checking the side with the support struts, which is normally the exhaust side.
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