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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.



Focused Flow 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. button

Varying Angular Distance Reduced Motor Hub Size
Thanks to its streamlined, compact motor design, the NF-A4x10’s motor hub is smaller than with conventional 4cm fans. This allows for more blade surface area and thus contributes to the NF-A4x10’s superior airflow and pressure performance.

Heptaperf AAO Frame
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. button

Stepped Inlet Design 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. button

Inner Surface Microstructures Inner Surface Microstructures
With the tips of the fan blades ploughing through the boundary layer created by the Inner Surface Microstructures, flow separation from the suction side of the blades is significantly suppressed, which results in reduced blade passing noise and improved airflow and pressure efficiency. button

Integrated Anti-Vibration 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.

SSO2 Smooth Commutation Drive 2
The latest version of Noctua’s advanced Smooth Commutation Drive system ensures superb running smoothness by eliminating torque variations and switching noises. This makes the NF-A4x10 remarkably quiet even at very close distance. button

SSO2 SSO2 Bearing
The NF-A4x10 features the further optimised second generation of Noctua’s renowned, time-tested SSO bearing. With SSO2, the rear magnet is placed closer to the axis to provide even better stabilisation, precision and durability. button

LNA Low-Noise Adaptor for full flexibility
The NF-A4x10 FLX (Flexibility) is supplied with a Low-Noise Adaptor (L.N.A.) that reduces the maximum fan speed from 4500 to 3700rpm so that it can be fine-tuned for superior airflow or maximum quietness.

LNA 3 to 2-pin Adaptor and Polarity Protection
The NF-A4x10 comes with an adaptor from 3-pin Molex to the 2-pin connectors used on many graphics cards or network and storage devices. An integrated diode provides polarity protection on 2-pin connections.

SSO2 OmniJoin Adaptor Set
Many devices featuring 40mm fans use proprietary fan headers, so the NF-A4x10 comes with Noctua’s OmniJoin Adaptor Set. Just cut the original fan’s cable, fix it to the adaptor using the supplied 3M Scotchlok™ connectors and you can plug the NF-A4x10 to proprietary fan headers! button

Cabling Options Extensive Cabling Options
The fan’s short 20cm primary cable minimises cable clutter in typical applications while the supplied 30cm extension provides extended reach when necessary. Both cables are fully sleeved.

Warranty 6 years manufacturer’s warranty
Noctua fans are renowned for their impeccable quality and outstanding longevity. Like all Noctua fans, the NF-A4x10 features an MTBF of more than 150.000 hours rating and comes with a full 6 years manufacturer’s warranty.




Noctua
26.02.2015 - PureOverclock.com NH-U9S
Test verdict: "In terms of performance, at the stock 3.5GHz settings, the coolers held their own ground and performed in the middle of the pack and even kept up with most of the AIO units we tested before. In push pull settings both coolers even kept up with the Corsair H100i by 1 degree. This was rather impressive for such small coolers." (Kenny Ha, PureOverclock.com)
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26.02.2015 - TruePCGaming.com NH-L9a
Test verdict: "The Noctua NH-L9i is undoubtedly the coolest and quietest ITX heatsink I’ve tested. Noctua have performed miracles when you consider the high-airflow and reasonable temperatures given its limiting size." (John Williamson, TruePCGaming.com)
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25.02.2015 - QWERTYmag.it NH-U14S
Test verdict: "Noctua NH-U14S è un prodotto indirizzato a tutti coloro che necessitano di performance senza dover rinunciare a memorie ad alto profilo o schede video in SLI/CrossFire. Il prodotto è costruito con materiali eccellenti e le rifiniture sono pari a quelle dei top di gamma presenti sul mercato. Le performance e la silenziosità rendono l'NH-U14S la giusta scelta per il vostro sitema!" (Davide Torno, QWERTYmag.it)
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24.02.2015 - ITFiles.ro NH-U9S
Test verdict: "Iar dacă adăugăm în ecuaţie şi finisajele excelente, plus atenţia deosebită la cele mai mici detalii, rezultă că preţul de achiziţie de circa 280 Lei este pe deplin justificat. Şi de aceea, recomand Noctua NH-U9S utilizatorilor care caută un cooler cu compatibilitate maximă pentru a răci procesoare rapide în PC-uri compacte." (Radu Bozga-Petcu, ITFiles.ro)
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