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Stepped Inlet Design

Noctua’s Stepped Inlet Design is an advanced aerodynamic design measure first introduced with the NF-F12 fan. By adding turbulence to the fan’s influx, the Stepped Inlet Design facilitates the transition from laminar to turbulent flow. This measure has an effect similar to the dimple structure of a golf ball in so far as it leads to better flow attachment to the frame, which allows the impeller to suck in more air and hence improves overall airflow efficiency.


Stepped Inlet Design


In addition to these aerodynamic benefits, the Stepped Inlet Design also reduces tonal intake noises caused by laminar inflow due to it being transformed to turbulent flow, which produces a more broadband noise profile. This way, the Stepped Inlet Design helps to refine the fan’s acoustic qualities by letting it blend into the background noise more easily and making it more agreeable to the human ear.


Noctua
22.10.2014 - El Chapuzas Informático NF-A4x10 5V
Test verdict: "Los ventiladores Noctua NF-A4/A8/A9 demuestran una vez más el buen hacer de Noctua, pues ofrecen un gran rendimiento con una sonoridad mínima. Además, llegan acompañados de un excelente kit de accesorios, algo de lo que pocas marcas pueden presumir." (Iván Martínez, El Chapuzas Informático)
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21.10.2014 - EnlaceHW.com NF-A4x10 5V
Test verdict: "Los ventiladores A-Series se mantienen fieles al nivel de calidad que uno espera de la marca Noctua. La construcción es excelente y refleja el alto nivel de la mano de obra en su fabricación. La robustez de los diferentes materiales involucrados en el proceso es evidente y se pueden apreciar a través de los detalles del marco del ventilador y hasta en los paneles anti vibraciones."
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21.10.2014 - PCGamers.net.au NH-D15
Test verdict: "The NH-D15 is a great option for those chasing a super quiet rig and builders who don't want to use closed loop water coolers but still want to chase heavy overclocks. It isn't cheap but it's build to last and performs well at a whisper. This is a well finished and thought out cooler and a worthy successor to the iconic NH-D14." (Phil Carroll, PCGamers.net.au)
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21.10.2014 - HwT.dk NH-D15
Test verdict: "Noctuas nye topmodel lever uden problemer op til forventningerne. Et lækkert kvalitetsprodukt som leverer hele vejen igennem, især når det kommer til køleevne. Det er desuden rigtigt flot at se hvor meget Noctua har forbedret sig i forhold til den gamle topmodel, NH-D14, som stadig er en god køler, bare ikke helt så god som den nye NH-D15." (Lynge Poulsgaard, HwT.dk)
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