Noctua NF A4x20 FLX, Premium Quiet Fan, 3 Pin (40x20mm, Brown)

Amazon

Premium quiet fan, 40x40x20 mm, 12V, 3-pin Molex, 5000/4400/3700 RPM, max. 14.9 dB(A), >150,000 h MTTF Award-winning A-series design with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance 40x20mm size ideal for 1U applications or replacing fans in network and storage equipment (routers, switches, NAS etc.) or other devices such as DVRs 3-pin FLX version provides 5000/4400/3700rpm speed settings via Low-Noise Adaptors to fine-tune the fan for maximum airflow or near-silent operation Includes anti-vibration mounts, fan screws, extension cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers

123-3D IE

Is your 3D printer, computer or other device making too much noise? This Noctua fan offers the solution: it ensures that your device works whisper-quiet. The aerodynamic fans are popular for their robust, stable and above all quiet character. They ensure optimum airflow. The grooves in the AAO frame allow air to be routed as efficiently as possible for the best cooling results. The integrated shock absorbers and SSO2 bearings reduce the noise level and ensure stability.This fan has a size of 40mm x 40mm x 20mm. The FLX variant has a fixed rotational speed. With this fan you benefit from a six-year warranty.