Noctua NF-A14x25r G2 PWM chromax.black 12V 1500RPM 140mm Next Gen Fan\n\n[features] Succeeding the iconic NF-A15; the NF-A14x25r G2 has quickly established itself as a new benchmark for premium quality quiet round-frame 140x25mm fans. Its advanced aerodynamic engineering featuring a novel Progressive Bend impeller design with Centrifugal Turbulator hub; winglets and a record tight tip clearance of only 0.7mm enables the G2 model to provide a significant boost in performance-to-noise efficiency over its renowned predecessor. At the same time; its etaPERF motor with SupraTorque can leverage extra torque headroom when required; which makes the NF-A14x25r G2 an ideal upgrade for NH-D15; NH-D15S and NH-U14S heatsinks. The chromax.black edition combines the NF-A14x25r G2\u2019s Sterrox liquid-crystal polymer impeller; comprehensive feature set and breakthrough quiet cooling proficiency with an attractive black design. Topped off with Noctua\u2019s trusted premium-grade SSO2 bearing; more t;