"Overall, the Noctua NF-F12 PWM fan is a great fan and definitely maintains the quality and performance that has become associated with Noctua products.The main features that went into this fan, and make it great at the same time include the Focused Flow Frame, stepped inlet design, inner surface microstructures, sso2 bearing, metal bearing shell, Heptaperf Impeller. These innovations have created one of the best fans on the market."