ARCTIC F PWM PWM Case Fan with Standard Case The ARCTIC F PWM forward the PWM signal from the CPU to the whole case ventilation system. The entire system is cooled quietly, but still offers the superb performance when needed. Versatile Applicable With the standard 25mm frame, the ARCTIC F PWM can be applied as intake or outtake system fan. Silent Operation Thanks to fluid dynamic bearing and the patented fan holder design, the ARCTIC F PWM is not only quiet, but also highly durable. Quick and Easy Setup Via the PWM signal, the CPU fan is controlled by the mainboard to reach the ideal temperature for the CPU. The patented PST (PWM Sharing Technology) is forwarding the PWM signal to all other fans inside the system. This way, all fans are spinning at the same speed. This provides silent operation in idle mode, but also gives sufficient performance, when required to offer efficient cooling. Noise Level F8 : 0.3 SoneF9: 0.4 SoneF12: 0.3 Sone Min. Fan Speed F8 : 700 RPMF9: 600 RPMF12: 400 RPM Max. Fan Speed F8 : 2000 RPMF9: 1800 RPMF12: 1350 RPM Airflow F8 : 31 CFM / 52.7 m3/hF9 : 43 CFM / 73.1 m3/hF12 : 74 CFM / 125.7 m3/h Bearing Fluid Dynamic Bearing Dimensions (Packaging) F8 : 82 L x 82 W x 25 H mmF9: 95 L x 95 W x 26 H mmF12: 123 L x 123 W x 26 H mm Dimensions (Product) F8 : 80 mmF9: 92 mmF12: 120 mm Limited Warranty 6 years UPC F8 : 0872767002630F9: 0872767002647F12: 0872767002654 Net Weight F8 : 96 gF9: 110 gF12: 144 g UPC Gross Weight 0.15 kg