The NF-A14 is a fan with a square AAO (Advanced Acoustic Optimization) frame. Its square shape and mounting holes (124.5 mm hole spacing) make it an excellent choice for use on water cooling radiators or as a case fan. Through advanced aerodynamic design measures such as Flow Acceleration Channels, the NF-A14 achieves an even better silent cooling performance compared to the multiple award-winning NF-P14. The PWM version is equipped with Noctua's specially designed NE-FD1 IC for fully automatic speed control and comes with a Low-Noise Adapter that allows for a reduction of the maximum speed from 1500 to 1200 rpm. Its performance-oriented maximum speed and comprehensive speed control options make the NF-A14 PWM a top solution for users seeking the perfect balance between excellent cooling performance and superb quietness, whether on water cooling radiators, heatsinks, or for case ventilation.