The ARCTIC F9 integrates some delicate features to improve the overall airflow and noise control management. Most 80mm and 92mm standard fans are equipped with 7 blades only, but all ARCTIC F9 fans, including the 80mm and 92mm ones, come with 9 blades in order to create higher airflow efficiently. Moreover, the refined 'ninja-knife' impeller design not only improves the laminar airflow, but it also lowers the noise level. Tested by hundreds of simulations, the result is significant - airflow is over 20% higher compared with a generic 7-blade case fan. 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.