Phanteks 140mm 600-1300RPM UFB Bearing Cooler Fan - White (PH-F140HP_WT) PH-F140HP has a larger base with a magnetic brushless DC motor to avoid the effects of resonance and for rotational stability. To create better structural strength and reduce the vibration occurrence, Phanteks redesigned the back frame of the PH-F140HP. 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. The new nine high pressure MVB blades are precisely angled to generate a silent controlled airflow. The blades produces a downdraft vortex allowing for greater amount of air passage through and reduce airflow turbulence across the surface of the blades 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. PH-F140XP's PWM functions allow users to adjust speed from 600 - 1200 RPM. Higher speed for performance and lower for silent operation.