How to tell which way a fan blows – 3 basic methods. I thought that the reason they did this was to break up that boundary layer air and get the airflow closer to the heat sink itself. How can you tell which way a fan is facing? This thread is now LOCKED b4 a bonfire which the water in my computer cant put out starts. Heat sink and CPU fan. You should push if you can, if you have to choose one. Preventing Your Computer From Overheating. The great news is that generally speaking it’s easy to tell fan air direction if you know what to look for. The greater the CFM, the more air a fan moves. High performance single fan CPU heat sinks almost always push air in rather than pull air out. If your computer is overheating, here are some things you can do about it: RELATED: Can Dust Actually Damage My Computer? Don’t: Mount the fans pushing … Jankowski: Yeah, buy more fans, man! It's all about case layout man. Hello, I've noticed in some threads people are able to point out whether a fan is incorrectly pulling/pushing air in a given person's build. Question Installed artic esports 34 duo fans as pull/push(the wrong way for my case fans config) how much does it matter? It's the same argument with smoothness. *laughs* I mean, yeah, you’ll have better cooling with push-pull than with just push or pull. You will also be able to identify the Exhaust side as you will see power wires entering the fan motor. It also depends strongly on the fan… The Rear or Exhaust side (the side that the air comes out of) of our fans will always be the side that houses the fan motor. Clean Out Your Computer’s Case: Dust accumulates in desktop PC cases and even laptops over time, clogging fans and blocking air flow. A heat sink that is both active and passive blows air through the finned radiator to help the heat escape faster.. Case fans. I've always been a fan of push over pull myself. Welcome to the forums by the way! To properly air cool your computer, you need have enough case fans to push or pull … Case fans and ventilation. Because of how they work (and how most are designed) there are great clues to help. You can use an AIO as either an Intake or an Exhaust, when at the top of the case it is more often an exhaust. Simply because heat rises. Incase you want to know direction, look for the frame, if it has a plastic bar going across it, that side is the side it blows out. Every fan features a cubic feet per minute (CFM) rating, which measures of the volume of air it moves in a minute. If you were to put it at the front of the case it would be great for an intake. Question PC won't start after trying to reset CMOS by pulling out the battery Question PC power cable was pulled from the wall while it was on. Also, I'm getting an H60 corsair cooler in a bitfenix shinobi xl case. 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