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Nine Blade Design

Many 140x140x25mm axial fans tend to suffer from low static pressure, making them less suitable for use on CPU coolers or watercooling radiators with tight fin spacing. The NF-P14 on the other hand features a highly optimised nine blade impeller design thatís following in the footsteps of Noctuaís successful NF-P12 and has been carefully fine-tuned for both airflow/noise efficiency and outstanding static pressure. As a result, the NF-P14 lends itself not only to use as a case fan but also to high-impedance applications like CPU cooling.

NF-P14 Blade Design


Thanks to the use of Vortex-Control Notches, an advanced design measure first introduced with the NF-P12 fan, the NF-P14 is surprisingly quiet despite of its impressive airflow and pressure performance. The two Vortex-Control Notches at the trailing edge of each blade make the flows along the suction and pressure side mix more smoothly, allowing for less turbulence and velocity loss, which leads to increased efficiency as well as a significant reduction in noise emission.

NF-P14 Blade Design


Vortex-Control Notches not only allow the flows to join less abruptly at the trailing edge, but also serve the purpose of psychoacoustic optimisation by making the fanís acoustic profile more pleasant to the human ear: Due to the Vortex-Control Notches, trailing edge vortices are split up into several smaller vortices, each having slightly different tonal characteristics. The fanís airflow noise is thereby spread over a wider range of frequencies and, as a result, perceived as much less annoying.

NF-P14 Blade Design


The Vortex-Control Notches' effect of psychoacoustic optimisation is further enhanced by the staggering of the notches. As the Vortex-Control Notches are staggered from blade to blade, each blade creates a different vortex pattern, which also helps to better spread the fan's noise emission over the frequency spectrum and thereby contributes to the fans unobtrusive acoustic profile that easily blends into the background noise.

NF-P14 Blade Design



More information:
button  120mm & 140mm Mounting
button  NF-P14 Metal Reinforcements




Noctua
16.04.2014 - hardCOREware.net NH-D15
Test verdict: "So there you have it Ė the NH-D15 is tied for the highest performing air cooler we have ever tested, as it comes out of the box. It is even more impressive when you consider the noise level Ė other coolers may match it, but you pay for that with added noise." (Carl Nelson, hardCOREware.net)
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16.04.2014 - LanOC.org NH-U12S
Test verdict: "All in all the NH-U12S is a quality product with that trademark Noctua premium feel. The larger amount of space is a pleasant thing to see and even in double fan mode the NH-U12S will provide clearance for the newer quad-channel RAM motherboards. With all this performance in a smaller, easy to install package it is nice to see that the age of the air cooler has not yet passed." (William Deborde, LanOC.org)
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15.04.2014 - Modders-Inc.com NH-D15
Test verdict: "Out of all the top three tested however, the Noctua NH-D15 has an advantage in terms of having a lower sound profile and a far simpler yet effective installation procedure. The NH-D15 also has the advantage of a 6-year warranty, the longest offered by any CPU cooler manufacturer. For this, the Noctua NH-D15 earns the Modders-Inc Must Have Award." (Ron Perillo, Modders-Inc.com)
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15.04.2014 - bit-tech.net NH-U12S
Test verdict: "Where the NH-U12S excels is actually being inaudible outside a case - you literally can't make it out amongst other case fans or a graphics card. This is where the extra cash is going - not in cooling but in offering similar performance to other, cheaper air coolers but with a significantly lower noise level." (Antony Leather, bit-tech.net)
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