The ARCTIC F Series is a high performance case fan for anyone looking for a quiet & efficient case fan. Perfectly Quiet 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. Impressive Airflow The special fan blades reinforce the volume of airflow by 20% comparing with those generic fans. Multi-Purpose Fan The ARCTIC F Series have a standard frame, making it possible to install the fans either in-taking or out-taking air in the PC case. The standard three-pin connector can easily be connected directly to mainboards.