Case fans are the intake and exhaust fans that move air through a desktop PC case, and they suit anyone building a new computer or improving the cooling of an existing one. Typical types are 120 mm and 140 mm fans, with PWM or DC speed control and plain or RGB-lit frames.
Brand and product listings for this category appear here as models are added to the range.
How to choose case fans
Size. Check which fan sizes your case supports before anything else. Most modern cases take 120 mm or 140 mm fans at the front, rear and top, while older or smaller cases may use 80 mm or 92 mm. A larger fan can move the same air at a lower speed, which usually means less noise.
Airflow or static pressure. Fans built for airflow suit open front panels and rear exhaust positions. Fans built for static pressure push air better through dust filters, mesh panels and radiators. If a fan is aimed at one job, the specifications or product description normally say so.
Connector and speed control. A 4-pin PWM fan lets the motherboard adjust speed in fine steps, from near silent at idle to full speed under load. A 3-pin DC fan is controlled by voltage, which gives a narrower range. Check that your motherboard has enough free fan headers, or buy a fan hub if you plan to fit several fans.
Noise and bearings. Look at the rated noise level in dBA and the maximum speed in RPM, and remember that a lower figure at the same airflow is better. Bearing type affects lifespan and sound: fluid dynamic and magnetic designs generally last longer and run more quietly than basic sleeve bearings.
Lighting and sync. Addressable RGB fans connect to a 3-pin 5 V header, while older RGB fans use a 4-pin 12 V header. The two are not interchangeable, so match the connector to your motherboard or controller. If you prefer a plain look, a fan without lighting is easier to fit and has one cable less to route.
Brands of case fans
No brand listings are published for this category yet, so we do not highlight individual makers here. When comparing manufacturers, these points are worth checking on each product:
- Bearing type: stated clearly in the specifications, since it influences how long the fan stays quiet.
- Speed range: a minimum and maximum RPM show how well a fan can be tuned for quiet running or heavy loads.
- Included extras: some fans come with rubber mounts, splitters or extension cables, which saves buying them separately.
Case fans: frequently asked questions
How many case fans do I need?
Most desktop PCs work well with at least one intake fan at the front and one exhaust fan at the rear. Systems with a powerful graphics card or processor often benefit from two intake fans and an extra exhaust at the top. The aim is a steady flow of cool air in and warm air out, rather than simply a large number of fans.
Should I choose 120 mm or 140 mm case fans?
Choose whichever size your case supports, and pick 140 mm where there is a choice. A 140 mm fan moves more air at a given speed, so it can run slower and quieter. Many cases have mounting holes that accept both sizes in the same position, but check the case manual first.
Are PWM case fans worth it?
Yes, if your motherboard has 4-pin fan headers. PWM fans change speed smoothly according to temperature or a curve you set in the BIOS, so the PC stays quiet when idle and cools harder under load. DC fans still work, but they offer less precise control.
Which way should a case fan face?
Check the arrows on the fan frame, which show the direction of airflow and the direction of rotation. Front fans normally pull air into the case, while rear and top fans push warm air out. Mounting every fan the same way creates a path through the case, and a slight excess of intake helps keep dust down when filters are fitted.
