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Case fans bring fresh air into your case and carry away the heat of your graphics card and processor. With the right fans your PC runs cooler and often quieter too. At COZO you'll find 120 and 140 mm fans with PWM control and ARGB lighting, single or in packs of three, from brands including be quiet!, Corsair, ASUS, NZXT, Lian Li and Phanteks.
First check which sizes your case supports at the front, top and back. At the same speed, a 140 mm fan moves more air than a 120 mm fan and is therefore often quieter. 120 mm is the most common size and also fits most liquid cooling radiators.
More fans than headers on your motherboard? Use a splitter or a hub. Some brands use a single cable for power and lighting through their own controller.
The classic setup pulls air in at the front (and bottom) and pushes it out at the back and top, since warm air rises. Pull in slightly more air than you exhaust: that light positive pressure keeps dust out, especially with front dust filters. Packs with 'reverse' fans have flipped blades, so you see the nice side while they still pull air in.
For a gaming PC, three fans are a good base: two at the front, one at the back. With a powerful graphics card or a top-mounted radiator, an extra pair helps. More fans at low speed are quieter than a few at full speed. All other cooling options are under Cooling.
For most gaming PCs, three are enough: two pulling air in at the front and one exhausting at the back. With a powerful graphics card or a radiator, you can add two more.
PWM is speed control through the fourth pin of the fan plug. The motherboard adjusts the speed smoothly to the temperature, so the fan only spins fast when needed.
To a 3-pin ARGB header (5 V) on your motherboard or to a separate controller. Never connect ARGB to a 4-pin RGB header (12 V).
A fan with mirrored blades and frame. It blows the other way, so you can for example see the lit side at the bottom or side while still drawing air in.
