The industrialPPC line is made entirely from fibre-glass reinforced polyamide which means it can withstand temperatures of up to 140°C. Noctua's industrialPPC fans are also water and dust proof certified which makes the NF-A14 industrialPPC fans suitable for operation in challenging environments. These fans were pulled from the fractal design R5 that I reviewed last year. Thus they too were indirectly provided by the manufacturer. These fans did something I’d swear was impossible: they blew more air when they drew through the dust filter than they did when they were facing open air. For that reason, their results will be shown separately.

These fans are arranged alphabetically by OEM. First we will look at them with all of their measurements on one chart. This will allow you to see the fans’ pressure profiles. Admittedly, this chart is a wee bit busy, so after this this we will break out the results, one at a time. Perhaps the biggest surprise here is that it didn’t make much difference to the temps how the fans were arranged. It made more difference to how much noise it made. The three-phase motor design is able to provide smoother transitions and thus allowing for even higher running smoothness while reducing vibrations and lowering power consumption.

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Let's now move on to the noise levels for full load to see how much louder the industrialPPC fans are over the NF-A15 PWM fan. Arriving at the tail end of the alphabet, the last three fans were the most interesting. All three beat their CFM specs as well as being as quiet or quieter than advertised. Then there is the odd result – four Yate Loon fans averaged 57.9 CFM when pulling air through the dust filter. They averaged only 59.3 CFM when there were no obstructions. One of them measured 0.2 CFM more with the filter than unobstructed, which ratifies the result from the fractal design fans.

When setting the fans to 50% of their maximum capacity sound became much more pleasing to the ears while stay keeping things cool. The CPU reached a maximum of 66.4°C which is just 0.4°C higher then before! the minimum was 35.0°C and the average noted 51.5°C on the the CPU. Sound dropped significantly in front of the case with an average of 33.6dB in and a max of 37.4. This equals the sound of someone whispering. NF-A14 Chromax at 30dB

The NF-A14 iPPC-3000RPM PWM on the other hand is about 6 dBA louder which is a little bit louder than what we were expecting but nevertheless, 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. Integrated Anti-Vibration Pads These features are what makes the NF-A14 industrialPPC fans ideal for industrial environments such as automotive industries, aeronautics or home appliances where energy efficiency is a key factor. Test Setup & Methodology Test Setup it stable with using ~1.25 volts and you will probably get much better temperatures than I did so keep that in mind. Fan Speed, Fan Size & Airflow This is something that many reviewers take for granted when testing CPU coolers and believe it or not, it makes a world of difference.

The NF-A14 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. Metal bearing shell Noctua is well known for its superb heatsinks and fans. You might say we are blown away by their products. This time around, they have modified their well-proven NH-C14. This is a blown-down heatsink. Why use a blow-down heatsink? You may have noted that some these heatsinks blow air directly on your RAM and or VRMs, cooling it. That’s one reason. But probably the most common reason is to use a narrower case. Noctua is one of the most well-known manufacturers of silent cooling. Especially the CPU coolers of the Austrian manufacturer enjoy an excellent reputation. They combine excellent processing quality with high cooling performance and minimal noise. Noctua fans are also responsible for this, which are also available separately to serve as a housing or CPU fan. CPU heatsinks tend to come with their own fans. Even when a manufacturer like Prolimatech sells CPU heatsinks, it sells its own fan that coincidentally produces great results on its heatsinks. Among 120 mm fans, many are built for heatsinks, some are built for radiators, some are built for cases, and some are built for newbies. And there are a zillion kinds out there. So we will not try to review 120 mm fans here. That would take forever – and all the OEM’s would have to cooperate in the endeavor.What is surprising is how well that NH-C14S did. It kept up with the D15. Quite an accomplishment. And if you’re willing to give up maybe a couple of degrees, a pair of NF-A14’s on RC7 low noise adapters will give a very quiet cooler that performs very well. From all the CPU coolers that we have in our lab, our first configured NH-D15 with two NF-A14 iPPC-3000RPM PWM sits at the top with the highest fan speed.