6 advanced high-performance heat pipes Silent Wings 4 120mm PWM fan for perfect air pressure and virtually inaudible operation High RAM and VRM cooler compatibility thanks to an asymmetrical design and cut-outs on the heat sink Achieves only 29.8dB(A) at maximum fan speed Special black coating with ceramic particles enables perfect heat transfer and elegant look A second fan can optionally be installed at the exhaust for even higher air pressure Unleashed performance and compatibilityDark Rock 5 is the compact embodiment of performance and high compatibility. With effortless installation and a silent fan, it is designed for passionate gamers of all kinds. Performance Fan's mean time to failure (MTTF) 300000 h Quantity per pack 1 pc(s) Bearing type Fluid Dynamic Bearing (FDB) Pulse-width modulation (PWM) support Yes Maximum air pressure 2.73 mmH2O Airflow 93.5 m³/h Maximum airflow 55 cfm Noise level (high speed) 29.8 dB Noise level (low speed) 11.9 dB Rotational speed (max) 2100 RPM Sup