Noctua NF-S12B redux – 1200PWM – Test and Review

As part of the Noctua’s portfolio, the Redux series is actually one of the largest ones and is meant to offer a lot and various models designed to deliver a very high quality and most of all a lot of cooling options. So far I’ve had the chance to test and review the biggest models part of the series with dimensions of 140mm – Noctua NF-P14r Redux 1500PWM and Noctua NF-P14s Redux 1500PWM and now it is time time to check what the fastest PWM powered and regulated version with dimensions of 120mm has to offer in matter of appearance, quality and performance.


Noctua NF-S12B redux – 1200PWM was delivered to me to perform a test and review in their latest, pretty simple and at the same time very stylish looking type of box. A package entirely made of robust carton delivering very firm fan protection and painted in the typical for the series grey / brown colour scheme.

Of course, on the front panel of the package there are the company logo, the size of the fan, the series name and the model name, while the full technical specifications explaining the product is located on a white sticker on the back of the box.


And before I continue describing the fan structure I want to mention that in this test and review I will describe and test only Noctua NF-S12B redux -1200PWM just because my equipment is not capable to test the other fans on the picture above, which are with dimensions of 80 and 92mm.

Now I believe it is time to pay some attention to the structure of the fan.


Noctua NF-S12B redux – 1200PWM STRUCTURE

As part of the redux series, Noctua NF-S12B redux – 1200PWM is based on the classic premium fan. The Noctua NF-S12B redux – 1200PWM is based on NF-S12B FLX which was released several years ago and which I had the chance to test and review. Actually, NF-S12B FLX was one of the first products tested and reviewed for this web page. The original model was a very good performer and I am really happy to see the fan was recreated with a new appearance and most probably delivering the same or even better performance. But of course, I will check this a bit later.

NF-S12B redux – 1200PWM front view NF-S12B redux – 1200PWM back view
IMG_0310 IMG_0312


The fan itself is designed with a square, plastic frame, 120 x 120 x 25mm in size and entirely painted in light grey, which is very simple and is made to be installed on a 120mm case fan slot, CPU cooler or water cooling radiator compatible with a 120mm fans, where its square shape will ensure full coverage and best pressure performance.

The frame itself looks pretty nice but let’s check the pressure optimized propeller, which for this model is designed with 7 pretty narrow and very sharply angled blades, developed for high-impedance applications such as CPU coolers, water-cooling radiators or cases with tight fan grills, which will lead to very high and stable airflow performance at very low noise level. The blades themselves are designed with the Noctua’s Bevelled Blade Tips technology, which is meant to reduce the critical rotor/stator interactions and to extend the leading edges of the blades. This will result in increasing the blades surface area to deliver quieter operation and thus form a cornerstone of the fan’s efficiency.


Of course, the connection between the motor and the propeller for Noctua NF-S12B redux – 1200PWM is done by the typical for the company SSO-Bearing, which combines the proven concept of hydrodynamic bearings with an additional magnet to support the self-stabilization of the rotor axis. The SSO-Bearing technology is designed to provide very quiet operation and exceptionally stable long life span of up to 150 000 hours.

The fan is designed to be 4-pin PWM IC with SCD powered and regulated. The PWM IC with SCD control method integrates Smooth Commutation Drive (SCD) technology, by providing smoother torque impulses, SCD suppresses PWM switching noises and thus the product operates more quietly at lower speeds.

Enough about the fan, let’s check the additional accessories.




Noctua NF-S12B redux – 1200PWM, like every other model part of the Redux series, is provided with a very simple accessories pack which features only one set of four installation screws to attach the fan to a case fan slot

Now let’s do some testing and check what the fan has to offer.


Noctua NF-S12B redux – 1200PWM TESTS

The tests will be conducted in my standard way. I will mount the fan and test it at 5V/7V/9V/12V and my goal will be to check the performance of the fan in real conditions. The product will be tested under close-to-perfect conditions, not taking into account any external factors. The results achieved during the test can in no way be the same if the fan is mounted on a cooler or on the case fan slot of any modern computer case. I will measure the amount of air going through the fan for one hour and its speed. For this I use a fan controller, a voltage meter, an anemometer and a stand made specifically for this purpose.

And this is what Noctua NF-S12B redux – 1200PWM looks like when operating on the test stand:


The test results are shown in the following charts:

Airflow through the fans at 5V, 7V, 9V, 12V

Noctua NF-S12B Redux -1200PWM A

Propellers rpm during the tests at 5V, 7V, 9V, 12V.

Noctua NF-S12B Redux -1200PWM R

The anemometer showed the following air speed passing through the propellers:

Noctua NF-S12B Redux -1200PWM S

After mounting the fan onto the stand, and leaving it to run for about 30 minutes at maximum speed, it was time to perform the tests.

As with my other tests, again I started with a gradual increase of the voltage through the Lamptron FCT starting at 0V and Noctua NF-S12B redux – 1200PWM made at least one full revolution at about 7.5V. To do the first test I had to decrease the operating voltage to 5V.

Test at 5V:

At the first test conducted at 5V, NF-S12B redux – 1200PWM was working at stable 570 revolutions per minute, providing airflow level of 52.32 cubic metres per hour. At this test the fan was completely silent.

Test at 7V:

At the second test performed at 7V, NF-S12B redux – 1200PWM delivered airflow level up to 75.36 cubic metres per hour while rotating with stable 780 revolutions per minute. At the second test the fan was still absolutely silent.

Test at 9V:

At the third test conducted at 9V, the fan was rotating at 990 revolutions per minute providing airflow level of 95.04 cubic metres per hour. At this test the fan was completely silent again.

Test at 12V:

At the last test conducted at 12V, the fan reached its maximum performance providing airflow level of 116.16 cubic metres per hour while rotating at 1230 revolutions per minute. At this test the fan started generating a very tiny noise coming out of the air passing through the propeller.

I believe it is time for conclusions:


Noctua NF-S12B redux – 1200PWM CONCLUSIONS

Noctua NF-S12B redux – 1200PWM Performance:

After I’ve spent some time checking the fan structure and after having some fun with testing the performance of the fan I can say that the new Noctua NF-S12B redux – 1200PWM version is a worthy successor of the classic NF-S12B FLX fan and is actually even better in matter of performance and appearance. The fan itself offers pretty simple structure combined with the typical Noctua technologies designed to deliver the best possible balance between airflow and static pressure levels, while working at very low noise level.

With this airflow and static pressure measured through the tests, the fan is definitely capable to deliver astonishing cooling performance, which will be able to keep every processor cool and stable, while being cooled by a CPU cooler or water radiator compatible with 120 mm fans.

Apart from being a good option for a main CPU cooler, the fan it is a very good choice to be installed as a case fan, too and set to PWM power and regulation method, which will definitely deliver a stable and quiet performance and will keep all of the modern and pretty hot hardware inside the case cool and quiet.

Noctua NF-S12B redux – 1200PWM Appearance:

Overall Noctua NF-S12B redux – 1200PWM offers very interesting design combined with a very simple and stylish colour scheme, which adds the feeling of rigid structure by making the fan look like it was made from metal. With this performance and appearance I believe this model is suitable to be used with every modern system in similar colour scheme or modding project featuring metal parts with shiny nickel coating.

I think Noctua NF-S12B redux – 1200PWM deserves the following reward:


Noctua NF-S12B redux – 1200PWM has been added to the 120mm fans catalogue.

Official price (MSRP): Noctua NF-S12B redux – 1200PWM – unknown

Warranty: 60 months

Special thanks to Noctua for providing us with a test sample.

Noctua NF-S12B redux – 1200PWM – Test and Review
7.7 Total Score

Noise Level
Additional accessories
User Rating: 3.75 (1 votes)

Dobrin Krastev is the owner, reviewer and newsman of with more than 15 years' experience in personal computers, server and storage systems, UPS, peripheral devices and software. Passionate about testing and reviewing, AMD overclocking using AM3 990FXA and AMD FM2 A85X test systems and building modding projects.
  1. Reply OptimusPrime 09.10.2016 at 13:10

    Thanks for the review! I have one comment though – as I understand it, PWM fans are not supposed to be controlled by voltage, rather by the 4th PWM control pin. PWM fans are designed to ALWAYS get 12V. A more realistic test would have emulated that somehow, possibly using a fan controller (or an actual motherboard). For more information see:

  2. Reply Dimcho 30.06.2015 at 11:15

    Great performance (as expected for Noctua’s products) and lower price (mainly due to lack of accessories) – absolutely deserved rating 🙂

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