Phanteks 140mm CPU Cooler Fan Upgrade, PWM, 1600 RPM High-Static Pressire, Blades Retail Cooling PH-F140HP_BK2(II) White/Black The new redeveloped blades in PH-F140HP II are bigger and designed to achieve higher air pressure. The redesigned MVB II blades generate better airflow and produces better performance. Mounts to 120mm fan The PH-F140HP II has a larger base size with a magnetic brushless DC motor to avoid the effects of resonance and for rotational stability. To create better structural strength, Phanteks redesigned the back frame of the PH-F140HP II. With the noise reduction challenges in mind, we modified the component for lower actuator noise, PCBA for lower electromagnetic noise, brushless motor structure for lower operating noise and frame rib for lower wind and vibration noise. Composed by MOSS and SSC systems, Phanteks' UFB bearings have an effective hub-tip ratio to achieve a state of equilibrium reducing air and vibration noise. SSC provides an increase in the bearing's lifespan and ensures that the fan's axis is consistently operational and quiet. PH-F140HP II's PWM functions allow users to adjust speed from 500 - 1600 RPM. Higher speed for performance and lower for silent operation by motherboard control. PH-F140HP II produces high static air pressure allowing for a direct and focusing airflow making them ideal for the densely packed fins of a heat sink.