Flow Acceleration Channels
The NF-A4x10 impeller features suction side Flow Acceleration Channels. By speeding up the airflow at the crucial outer blade regions, this measure reduces suction side flow separation and thus leads to better efficiency and lower vortex noise.
Noctua's AAO (Advanced Acoustic Optimisation) frames feature integrated anti-vibration pads as well as Noctua's proprietary Stepped Inlet Design and Inner Surface Microstructures, both of which further refine the fan's performance/noise efficiency.
Stepped Inlet Design
Noctua's Stepped Inlet Design adds turbulence to the influx in order to facilitate the transition from laminar flow to turbulent flow, which reduces tonal intake noise, improves flow attachment and increases suction capacity, especially in space-restricted environments.
Integrated Anti-Vibration Pads
Integrated Anti-Vibration Pads made from extra-soft silicone minimise the transmission of minute vibrations while maintaining full compatibility with all standard mounting systems and fan clips used on heatsinks.
Mounting hole spacing
A-Series with Flow Acceleration Channels
AAO (Advanced Acoustic Optimisation)
Rotational Speed (+/- 10%)
Rotational Speed with L.N.A. (+/- 10%)
Min. Rotational Speed (PWM, +/-20%)
Airflow with L.N.A.
Acoustical Noise with L.N.A.13,7 dB(A)
2,18 mm HO
Static Pressure with L.N.A.
1,29 mm HO
Max. Input Power
Max. Input Current
> 150.000 h
Scope of Delivery
Low-Noise Adaptor (L.N.A.)
30cm Extension Cable
4 Fan Screws
Item Dimension (L inchxW inchxH inch)
9 x 6 x 2