The ARCTIC F series is a high performance case fan for anyone looking for a quiet and efficient case fan. The refined "ninja-knife" impeller design not only improves the airflow, but it also lowers the noise level significantly. The ARCTIC F series fans remain inaudible even while running at full speed. The ARCTIC F series have a standard frame, making it possible to install the fans either intaking or outtaking air in the PC case. The standard three-pin connector can easily be connected directly to mainboards.