High performance cooling fan?? 140x140x25 mm?? 12V?? 4-pin PWM?? max. 1500 RPM?? max. 25.8 dB (A) ?? >150??000 h MTTFRenowned NF-P14r high-end 140x25mm round-frame 12V fan?? more than 100 awards and recommendations from international computer hardware websites and magazines?? hundreds of thousands of satisfied usersHighly optimised low-noise design provides outstanding quietness of operation?? excellent static pressure and strong airflow (CFM) ?? round frame for air-based CPU coolers such as NH-D15 or NH-D141500rpm 4-pin PWM version with excellent balance of performance and quietness?? supports automatic motherboard speed control (powerful airflow when required?? virtually silent at idle)Streamlined redux edition: proven Noctua quality at an attractive price point?? wide range of optional accessories (anti-vibration mounts?? S-ATA adaptors?? y-splitters?? extension cables?? etc. )