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Noctua - Button Review Review
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Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua’s AAO frame, the NF-A4x10 FLX is a highly optimised, premium quality quiet fan in 40x10mm size. Smooth Commutation Drive technology and Noctua’s reference class SSO2 bearings guarantee superb running smoothness and excellent long-term stability. Topped off with modular cabling, a Low-Noise Adaptor and OmniJoin Adaptor Set as well as 6 years manufacturer’s warranty, the NF-A4x10 is a premium choice for the highest demands.

Size40x40x10 mm
Blade GeometryA-Series with Flow Acceleration Channels
Frame TechnologyAAO (Advanced Acoustic Optimisation)
Rotational Speed (+/- 10%)4500 RPM
Rotational Speed with L.N.A. (+/- 10%)3700 RPM
Airflow8,2 m³/h
Airflow with L.N.A.6,6 m³/h
Acoustical Noise17,9 dB(A)
Acoustical Noise with L.N.A.12,9 dB(A)
Static Pressure1,78 mm H2O
Static Pressure with L.N.A.1,21 mm H2O
Max. Input Power0,6 W
Max. Input Current0,05 A
Voltage12 V
MTBF> 150.000 h
Scope of Delivery
  • Low-Noise Adaptor (L.N.A.)
  • 3:2 Pin Adaptor
  • OmniJoin Adaptor Set
  • 30cm Extension Cable
  • 4 Vibration-Compensators
  • 4 Fan Screws
Warranty6 years

12.10.2015 - NH-D15S
Test verdict: "En conclusión, ¿Compraríamos o recomendaríamos el Noctua NH-D15S? Definitivamente. Noctua es el Rolls Royce de las soluciones de refrigeración y no dudamos un solo instante en recomendar este producto a ojos cerrados." (Sebastian Rodriguez Ayala,

12.10.2015 - NH-L9x65
Test verdict: "Noctua has always been at the forefront of cooling prowess and engineering new methods to enhance the size to performance ratio. While the NH-L9x65 is larger and less versatile, there’s no denying the impeccable advancements in heat dissipation. The performance numbers are stunning and it’s crystal clear that the NH-L9x65 is a pioneering product and the best cooler I’ve encountered for use in exceptionally small cases." (John Williamson,

12.10.2015 - NH-U9S
Test verdict: "No geral, a Noctua presenteia-nos com mais dois coolers de qualidade, como já é habitual da marca." (Pedro Fernandes,

11.10.2015 - NH-D15S
Test verdict: "Kurz gesagt: Der NH-D15S bekommt eine klare Empfehlung von unserer Redaktion ausgesprochen - auch wenn der Preis recht hoch ausfällt." (Christoph Miklos,