Hybrid-impeller fans are the rage again, following its launch by ASUS in its DirectCU Mini line of graphics cards. Cooler Master launched a case fan based on the same concept of an impeller with both lateral and axial flow blades, called HybridFlow. Unlike in a graphics card, where air flowing laterally has an escape through the rear panel, a case fan typically doesn't, and so Cooler Master designed the frame of the fan to funnel lateral flow outside (or wherever the fan's airflow is directed at). For now, HybridFlow comes in just the one size - 120 mm. Depending on how it's received, Cooler Master could try out other sizes.