Welcome to the forums by the way! It's the same argument with smoothness. Every fan features a cubic feet per minute (CFM) rating, which measures of the volume of air it moves in a minute. High performance single fan CPU heat sinks almost always push air in rather than pull air out. The greater the CFM, the more air a fan moves. 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 great news is that generally speaking it’s easy to tell fan air direction if you know what to look for. Because of how they work (and how most are designed) there are great clues to help. To properly air cool your computer, you need have enough case fans to push or pull … Don’t: Mount the fans pushing … It also depends strongly on the fan… 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. 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. I've always been a fan of push over pull myself. Heat sink and CPU fan. Question Installed artic esports 34 duo fans as pull/push(the wrong way for my case fans config) how much does it matter? If you were to put it at the front of the case it would be great for an intake. How can you tell which way a fan is facing? 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. *laughs* I mean, yeah, you’ll have better cooling with push-pull than with just push or pull. 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. This thread is now LOCKED b4 a bonfire which the water in my computer cant put out starts. 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. This dust can cause ventilation problems, trapping heat and preventing your PC from … Simply because heat rises. 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. How to tell which way a fan blows – 3 basic methods. Preventing Your Computer From Overheating. If your computer is overheating, here are some things you can do about it: RELATED: Can Dust Actually Damage My Computer? A heat sink that is both active and passive blows air through the finned radiator to help the heat escape faster.. Case fans. It's all about case layout man. Case fans and ventilation. 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. 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