The corsair dominator gt memory airflow fan contains two 60mm tachometer controlled fans to provide impinging airflow to the memory subsystem with the moderate rpms required to provide adequate forced air the corsair dominator airflow fan is nearly silent the corsair dominator airflow fan is designed to be matched with the dominator heat sinks and allows even more heat to be removed from the dhx xms2 dominator modules features specifically designed airflow unit two 60mm fans tachomete