The greater the CFM, the more air a fan moves. 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. You will also be able to identify the Exhaust side as you will see power wires entering the fan motor. Simply because heat rises. Question Installed artic esports 34 duo fans as pull/push(the wrong way for my case fans config) how much does it matter? How can you tell which way a fan is facing? I've always been a fan of push over pull myself. If your computer is overheating, here are some things you can do about it: RELATED: Can Dust Actually Damage My Computer? You should push if you can, if you have to choose one. Also, I'm getting an H60 corsair cooler in a bitfenix shinobi xl case. Every fan features a cubic feet per minute (CFM) rating, which measures of the volume of air it moves in a minute. Don’t: Mount the fans pushing … 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. The fans should be impeded as little as possible when pushing or pulling air through the radiator to give the most performance for the whole system. 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. This dust can cause ventilation problems, trapping heat and preventing your PC from … If you were to put it at the front of the case it would be great for an intake. It also depends strongly on the fan… The great news is that generally speaking it’s easy to tell fan air direction if you know what to look for. Clean Out Your Computer’s Case: Dust accumulates in desktop PC cases and even laptops over time, clogging fans and blocking air flow. Because of how they work (and how most are designed) there are great clues to help. 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. To properly air cool your computer, you need have enough case fans to push or pull … How to tell which way a fan blows – 3 basic methods. *laughs* I mean, yeah, you’ll have better cooling with push-pull than with just push or pull. A heat sink that is both active and passive blows air through the finned radiator to help the heat escape faster.. Case fans. A heat sink on the processor or another internal cooling unit can suck or blow depending on the heat sink and configuration of the computer's internal components. Welcome to the forums by the way! Heat sink and CPU fan. Jankowski: Yeah, buy more fans, man! 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. High performance single fan CPU heat sinks almost always push air in rather than pull air out. 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