Great performance-to-noise ratio with 28.1Db(a) at 1, 600Rpm. Air flow - 77.57 CFM. Noise level - 28.1 decibels 6-Pole fan motor for less power consumption and vibration Fluid-dynamic bearing enables super-long life span of 300, 000 hours Fan frame with funnel-shaped air inlets for extremely high air pressure Seven fan blades provide optimized airflow Pwm controlled fan speed by the motherboard