Noctua NF-A4x20 PWM Computer case Fan 4 cm Beige. Brown

About this product

Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua’s AAO frame. the NF-A4x20 is a highly optimised. premium-quality quiet fan in size 40x20mm. The PWM version sports Noctua’s custom-designed NE-FD1 IC for fully automatic speed control via 4-pin fan headers and comes with a Low-Noise Adaptor as well as an OmniJoin™ Adaptor Set for easy connection to proprietary fan headers. Its superb running smoothness. reference-class SSO2 bearing and Noctua’s trusted premium quality make it an elite choice for the highest demands.40x20mm sizeCompared to Noctua’s award-winning NF-A4x10. the NF-A4x20 is twice as thick. which allows for increased static pressure performance and makes the NF-A4x20 ideal for demanding applications with high flow resistance.Flow Acceleration ChannelsThe NF-A4x20 impeller features suction side Flow Acceleration Channels. By speeding up the airflow at the crucial outer blade regions. this measure reduces suction side flow separation and thus leads to better efficiency and lower vortex noise.AAO FrameNoctua's AAO (Advanced Acoustic Optimisation) frames feature integrated anti-vibration pads as well as Noctua's proprietary Stepped Inlet Design and Inner Surface Microstructures. both of which further refine the fan's performance/noise efficiency.Stepped Inlet DesignNoctua's Stepped Inlet Design adds turbulence to the influx in order to facilitate the transition from laminar flow to turbulent flow. which reduces tonal intake…