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Here is a table showing RPM range and corresponding airflow and speed measurements of the ARCTIC P12 MAX fan: Let’s start by measuring the loudness, the aspect that can worry us the most in a fan as fast as this one. To measure the noise it emits, we have used a Protmex PPM-SM001 sound level meter at an exact distance of 50 centimeters, since by doing it this way the data we obtain is measured in dBA. As always, we have made two measurements: one letting the fan work by PWM, and another forcing it to work at maximum speed with a rehobús. This is the result. Unfortunately, I cannot agree with this statement even now. The extra details that Noctua has often stand out more with relatively higher speeds. Whether it’s Flow Acceleration Channels, Stepped Inlet Design, a significant narrowing of the gap between the blade tips and the frame or Inner Surface Microstructures. These elements counteract the shortcomings that become stronger with increasing pressure. The fact that the NF-A12x25 gives excellent results at low speeds is largely due to the fact that the operation of the motor and blades does not create any noise, so at this level there are no such pronounced limitations as with other fans, and the NF-A12x25 fits into the same noise level at higher speeds.
ARCTIC has provided long and short screws which would help the user in convenient installation in the case or on the radiator as the case may be. Testing Each mounting corner has a gray color anti-vibration pad that minimizes the vibrational noise coming from the surface on which the fans are installed. For being only a 6-euro fan, the precision of production is extremely high. It’s only at the level of really fine detail that you’ll find that the P12 has slightly looser manufacturing tolerances than Arctic fans with a similar rotor. There will be a tiny unevenness here and there on the P12, but it will have virtually no impact on the performance. And at this price range, it’s also a bit unfair to point it out, as similarly priced fans often fare considerably worse.Starting out, it’s still worth noting that the Arctic P12 compares with the previously tested BioniX P120 A-RGB, although it has seemingly the same rotor – it doesn’t. And there are more than enough differences, including a shorter tunnel (P12) with less rotor clearance from an obstacle, but let’s start the analysis as usual from the top. The signal quality of the motherboard/hub should not make a difference in noise, it is determined by the NE-FD1 IC inside the fan. Noctua often has complaints about the PWM signal quality of third party devices and states that it can be misinterpreted at lower speeds. But this is not the case with Noctua fans and it should not affect the noise level anyway, as long as the fan is running stable at the given speed. The misinterpretation of PWM that Noctua mentions is that the fan operation may not correspond to the set PWM duty cycle ( we have discussed this in more detail in this article, where we also discuss the key features of the new Noctua NA-FH1 hub).
ARCTIC has mentioned that their newly developed fan motor has a low noise output even at full speed. It is also mentioned that there is no startup jerk and that this motor produces less commutation vibration. This is why there are no anti-vibration pads on the mounting corners. ARCTIC P12 SLIM PWM Cable I do not claim that NF-A12x25 PWM is at 787 rpm (i.e. the speed in our “31 dBA” mode) a noiseless or soundless fan, I am just trying to balance it a bit. At this speed you write about industrial noise or use in noisy technical rooms, which is misleading. I respect that in your idea of quiet operation the NF-A12x25 PWM has an even lower speed. times more intensity than 70 dBA. It can damage the eardrums if it is exposed for more than 8 hours. Curiously, and despite being the highest-speed fan of all we’ve tested so far, it’s by no means the loudest; in fact, when we have carried out the test in PWM mode, since the PC was at rest the fan was off, so those 16.5 dBA that we have measured are, really, the environmental noise that we had in the room when measuring. Already at full speed we measured 33.4 dBA, making it the loudest 120mm fan we’ve ever had, but not the loudest in absolute terms (the 140mm ML140 was quite a bit louder and that which spins at 2,000 RPM). It is literally impossible for a human being to “hear” absolute silence, but this is the threshold of hearing.As you can see, these Arctic P12 Max make some noise, but less noise from the environment than there would be in a library, so it’s not annoying at all… we can also tell you that the noise that is heard is that of the air being moved by the fins , there are no vibrations or engine noise. These fans are using Fluid Dynamic Bearings. ARCTIC has mentioned that they have used a combination of alloy/lubricant developed in Germany to reduce the friction within the bearing. This in turn would generate less heat and improves efficiency. This will increase the service life of the fans. In this article, we will take a look at these fans and see what the hype all about is. Item: ARCTIC P12 MAX Pricing: MSRP €12.99 at the time of the Review for a single fan These fans feature double ball bearings from Japanese manufacturer NMB. These bearings provide a much longer service life of these fans having a minimum of 500,000 hours. One possible reason to use these bearings is that these fans have high speed. Maintaining these speeds over a much longer time period would need better bearings but it is also surprising that many other manufacturers are providing similar speed range using Fluid Dynamic Bearings. Anyhow, we don’t know if the motor of these fans has a 6-pole, 3-phase design or not. According to ARCTIC using sinus-magnetizing, the new motor only creates about 5 % of the vibration from the commutation of a regular DC motor without a filter.
There are a lot of droning or downright rumbling fans out there, but none have been as popularized by this sound profile as the Arctic P12. Probably also because this acoustic deficiency is really pronounced here and has pushed the manufacturer to make design changes in newer models that are aimed at suppressing critical tonal peaks. But even so, the base model P12 PWM PST is a remarkable fan and is unbeatable in its price range.We are raking the airflow reading by placing the instrument closer to the fan. The values would vary depending upon the distance between the anemometer and the fan. As we have noted many times, Arctic is a manufacturer that focuses on the performance of its products above the rest of the frills, offering excellent performance at a low noise level, and above all at very competitive prices; All this has made it one of the manufacturers that sells the most refrigeration products in Europe, and for a reason. We are reporting the absolute temperature on the graph. The testing is done on an open-air bench system. Once inside the chassis, the temperatures are expected to rise and would largely depend upon the optimal airflow inside the chassis. Not every run of the stress test may yield the same result. This could well be due to many factors like mounting pressure, thermal paste application, and varying ambient temperature. Not to mention the silicon differences even among the same category of chips. Hence, it is pertinent to mention the testing methodology along with the specifics.
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