Description:The ARCTIC F PWM fans outerperform other 80mm/92mm/120mm fans in the market. The patented PWM Sharing Technology (PST) regulates the speed up to 5 fans via BIOS. With efficient central cooling, the ARCTIC F PWM fans offer excellent cooling and noise control performance for the system.Features: Patented PWM Sharing Technology (PST) Extremely quiet High air flow and static pressure Low noise impeller Fluid dynamic bearing extends service lifeTechnical Information: PST: PWM amplifier integrated on motor circuit 4 pin plug for receiving power and PWM signal from motherboard 4 pin socket for CPU cooler or second fan 3 pin plug to send fan RPM signal to motherboard Dimensions: 80 L x 80 W x 25 H mm Rated Fan Speed: 700 - 2000 RPM (controlled by PWM) Air Flow: 28 CFM / 47.6 m3/h Noise Level: 0.3 Sone Weight: 70 g Bearing: Fluid Dynamic Bearing