Three heatpipes and aluminum fins are designed for maximum cooling while cooler setup quickly expels hot air out of the case. An ultra quiet 92mm fan with EBR bearing is incorporated for minimized noise and excellent cooling. The PWM (Pulse Width Modulation) Fan automatically adjusts fan speed (RPM) according to the CPUs temperature. The cooler is designed with tool-less installation clip, making installation convenient. The included all new high performance thermal greaseZM-STG2M maximizes heat transfer from the CPU to the base of CNPS5X for intensified cooling performance.