The NF-A6x25 is a highly optimized silent 60x25mm fan in premium quality, which draws on future-oriented aerodynamic design measures such as Flow Acceleration Channels and Noctua's AAO frame system. The PWM version uses Noctua's specially designed NE-FD1 IC for fully automatic speed control via 4-pin connections and is supplied with a low-noise adapter, through which the maximum speed in PWM operation can be reduced from 3000 to 2300rpm. Its outstanding smoothness, the SSO2 reference class bearing and Noctua's proven premium quality make the NF-A6x25 PWM a choice for the highest demands.
Flow Acceleration Channels
The impeller of the NF-A4x10 is equipped with so-called Flow Acceleration Channel at the suction side. The acceleration of the air flow in the critical outer regions of the fan blades reduces the suction-side vortex-ablation, resulting in higher efficiency and lower turbulence-related noise emission.
AAO frame system
Noctua's AAO (Advanced Acoustic Optimization) frames have built-in vibration buffers and a stepped inlet design (stepped inlet Design) and an interior microstructure (Inner surface Microstructures), which enable even better performance/noise efficiency.
Stepped Inlet Design
The stepped inlet area of the causes more turbulence in the inlet. This facilitates the transition from laminar to turbulent flow, which is better attached to the frame (flow attachment) and thus increases the suction capacity of the fan, especially when the intake area is limited.
Integrated Anti-Vibration Pads
The anti-vibration pads, made from extra-soft silicone, reduce the transmission of minimal vibrations and are compatible with all standard screws as well as standard mounting systems or fan clips used in CPU coolers.
PWM IC WITH SCD
The NF-A6x25 PWM supports fully automatic speed control via PWM and uses Noctua's specially designed NE-FD1 chip for this purpose. This new PWM IC integrates Noctua's smooth commutation Drive (SCD) technology, which minimizes PWM switching noise and makes the fan even quieter at low speeds.
Low-Noise Adapter
The NF-A6x25 PWM is supplied with a (L.N.A.) that reduces the maximum speed from 3000 to 2300rpm. This allows you to operate the fan at a constant 2300rpm or limit the maximum speed in PWM operation.
Comprehensive Connectivity Options
While the 20cm short primary cable helps to avoid cable clutter in typical applications, the included 30cm extension provides extra range for all cases. Both cables are fully sheathed and a 4-pin Y-cable allows a second PWM fan to be controlled at the same connection.
