Impressive airflow improvement The ARCTIC F8 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 F8 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. Higher airflow ? higher noise level Over the years ARCTIC COOLING has built a reputable name on precise case fan engineering and noise control and the new ARCTIC F8 is no exception. Despite the increase in airflow rate the ARCTIC F8 fans remain nearly inaudible thanks to the high-quality fluid dynamic bearing and the new impeller design. The maximum noise level is at only 0.4 sone for the 120mm fan. The ARCTIC F series is definitely a good option for anyone pursuing a quiet PC case cooling solution.