The NF-S12A marks the third generation of Noctua’s signature S12 series quiet case fans, which have received more than 250 awards and recommendations from the international press. 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 improves the airflow/noise efficiency of its renowned predecessor by up to 8%. The ULN version provides super-slow 800 / 600rpm speed settings for ultra-low-noise applications and highly noise sensitive users who demand near-silent operation. Its superb running smoothness, SSO2-Bearings and Noctua’s trusted premium quality make it an elite choice for quiet case cooling. Specifications Size 120 x 120 x 25 mm Bearing SSO-Bearing Connector 3-Pin Blade Geometry S-Series with Anti-Stall Knobs Rotational Speed ±10% 800 PRM Rotational Speed with L.N.A. ±10% 600 RPM Airflow 43.73 CFM Airflow with L.N.A. 33.84 CFM Acoustical Noise 8.6 dB(A) Acoustical Noise with L.N.A. 6.7 dB(A) Static Pressure 0.62 mm H2O Static Pressure with L.N.A. 0.44 mm H2O Input Power 0.72 W Input Current 0.6 A Voltage Range 12 V MTBF > 150.000 h Warranty 72 months