Computer Case Fans

Measure the fan mounting holes in your case (common sizes: 120 mm and 140 mm) and check whether the case supports front, top, rear or bottom mounting; verify thickness (usually 25 mm) and whether your case uses standard 4-screw mounts or proprietary brackets

Compare airflow (CFM), static pressure (mmH2O) if mounting on radiators or restricted intakes, and noise level (dB(A)); higher RPM generally increases airflow and noise, while high static pressure fans are better for radiators and dense filters

PWM (4-pin) fans allow precise speed control from the motherboard or fan controller and are recommended for variable cooling/noise; 3-pin voltage-controlled fans can be used too but offer coarser speed control. Connect to corresponding motherboard headers or a dedicated controller, and use adapters only if necessary

Bearing types (sleeve, rifle, ball, fluid dynamic) affect longevity and noise; fluid dynamic and high-quality rifle/ball bearings typically offer longer life and quieter operation, so prioritize better bearings for 24/7 or high-load systems

Prioritize static pressure for radiators, heatsinks, or heavily filtered/intake scenarios because it maintains flow through dense surfaces; prioritize higher airflow for unobstructed case ventilation

RGB/LED is purely aesthetic and typically does not affect acoustic or thermal performance; ensure controller and wiring compatibility with your motherboard or lighting hub, and account for a small additional power/space requirement

Clean fans and dust filters regularly with compressed air, ensure bearings are not dry (some fans allow lubrication), check for loose screws or warped frames, and replace fans that show excessive wobble or increased noise