The NF-A12x15 is a fan that utilizes innovative aerodynamic design features such as Flow Acceleration Channels and Noctua's AAO frame system. With a slim depth of only 15 mm, the NF-A12x15 is perfect for applications with limited space, such as low-profile CPU coolers or HTPC cases. The PWM version uses Noctua's specially designed NE-FD1 IC for fully automatic speed control via 4-pin connectors and comes with a low-noise adapter that reduces the maximum speed in PWM mode from 1850 to 1400 rpm. Its excellent running smoothness, the SSO2 reference-class bearing, and Noctua's proven premium quality make the NF-A12x15 PWM an exceptional choice for the highest demands.