Noctua NF-S12A PWM Ultra Quiet 120mm PWM Cooling Fan

Noctua NF-S12A PWM Ultra Quiet 120mm PWM Cooling Fan The NF-S12S-PWM is Noctua's latest 120mm PWM premium quality fan that offers full flexibility in quiet to ultra-quiet case cooling thanks to its Advanced Acoustic Optimisations. Specifically conceived for pressure demanding applications such as CPU cooling, the classic NF-P12 120mm fan helped to found Noctuas reputation as a top-tier manufacturer of premium quality quiet cooling components and still impresses users with its exquisite quietness and superb performance. Features Two speed settings for maximum quietness High 62.21 CFM airflow Advanced Acoustic Optimisation Frame Custom NE-FD1 circuitry for smooth speed control Smooth SSO-Bearings Six year warranty Featuring a further refined blade design with Anti-Stall Knobs that works in
tandem with the new AAO or Advanced Acoustic Optimisation frame. The NF-S12A improve s the airflow/noise efficiency of its renowned predecessor by up to 8%. The PWM version sports Noctuas custom designed NE-FD1 IC for fully automatic speed control via 4-pin fan headers and comes with a Low-Noise-Adaptor to reduce the maximum speed during PWM control from 1200 to 900rpm. Its superb running smoothness, and Noctuas trusted premium quality make it an elite choice for quiet case cooling. Noctuas Advanced Acoustic Optimisation Frame Noctuas AAO (Advanced Acoustic Optimisation) frames feature integrated anti-vibration pads as well as Noctuas proprietary Stepped Inlet Design and Inner Surface Microstructures, both of which further refine the fans performance/noise efficiency. Anti-stall Knobs:
What is Stall? Noctuas S12 series fans impellers use a high angle of attack in order to achieve superior airflow. However, impellers with high angles of attack are typically more prone to undesired stall and flow separation phenomena that can occur when the fan is working against higher impedance such as when blowing through tight fan filters or when used on heatsinks and radiators. In these situations when the fan is building up high pressure but less air is moving through, the speed of the air particles flowing alongside the suction side of the fan blades gradually decreases towards the trailing edge. The lower the speed and the higher the counter-pressure, the higher the risk of the air particles becoming detached from the blade surface. This flow separation phenomenon known as stall
leads to undesired turbulence, reduced efficiency and translates into a dent in the fans performance curve. Integrated Anti-Vibration Pads Integrated Anti-Vibration Pads made from extra-soft silicone minimise the transmission of minute vibrations while maintaining full compatibility with all standard screws and other mounting systems. Smooth Commutation Drive 2 The latest version of Noctuas advanced Smooth Commutation Drive system ensures superb running smoothness by eliminating torque variations and switching noises. This makes the NF-S12A remarkably quiet even at very close distance. Stepped Inlet Design Noctuas Stepped Inlet Design adds turbulence to the influx in order to facilitate the transition from laminar flow to turbulent flow, which reduces tonal intake noise, improves flow
attachment and increases suction capacity, especially in space restricted environments. Inner Surface Microstructures With the tips of the fan blades ploughing through the boundary layer created by the Inner Surface Microstructures, flow separation from the suction side of the blades is significantly suppressed, which results in reduced blade passing noise and improved airflow and pressure efficiency. Package Contents As expected from Noctua, the fan is well packaged and is supplied with both the usual fan mounting screws and also rubber fan mounts to isolate the fan from the case ensuring that no vibrations from the fan can reach the case. An in-line resistor (L.N.A) is included and this simply lowers the voltage and therefore the overall speed of the fan if the default range of
speeds are too high. A Molex adapter allowing you to power the fan from the PSU, an extension cable and a PWM splitter cable are also included. Specifications: Size - 120 x 120 x 25 mm Bearing - SSO-Bearing Connector - 4-Pin PWM Blade Geometry - S-Series with Anti-Stall Knobs Maximum Rotational Speed ±10% - 1200 PRM Maximum Rotational Speed ±10% with L.N.A. ±10% - 900 RPM Maximum Airflow - 62.21 CFM Maximum Airflow with L.N.A. - 48.96 CFM Maximum Acoustical Noise - 17.8 dB(A) Maximum Acoustical Noise with L.N.A. - 10.7 dB(A) Maximum Static Pressure - 1.19 mm H2O Maximum Static Pressure with L.N.A. - 0.73 mm H2O Input Power - 1.44 W Input Current - 0.12 A Voltage Range - 12 V MTBF > 150.000 h