heading

Conceived for industrial heavy duty applications that require enhanced cooling performance and advanced ingress protection, the NF-A14 industrialPPC (Protected Performance Cooling) is a ruggedised high-speed version of the award-winning retail model. Thanks to the outstanding aerodynamic efficiency of the NF-A14 design and the use of a novel three-phase motor, the industrialPPC version provides superior airflow and pressure capacity while keeping noise levels and power consumption moderate as against comparable high-speed fans. While its fibre-glass reinforced polyamide construction and certified water and dust protection make the NF-A14 industrialPPC suitable for operation in challenging environments, the renowned SSO2 bearing technology guarantees an MTBF of over 150.000hrs. Topped off with Noctua’s trusted reliability and 6 years manufacturer’s warranty, the NF-A14 industrialPPC is an ideal choice for highly demanding applications that require superior flow rates and ultimate dependability.
Details
Award-winning NF-A14 design

Award-winning NF-A14 design

Having received more than 100 awards and recommendations from the international press, Noctua's NF-A14 has become a proven premium choice for 140mm cooling needs. Its renowned efficiency has convinced tens of thousands of customers all over the world.
2000rpm industrialPPC version

2000rpm industrialPPC version

Thanks to its elevated 2000rpm top speed, the NF-A14 industrialPPC-2000 provides a significant performance boost over the 1500rpm retail version. Combined with the industrialPPC series' robust polyamide construction and advanced protection features, this makes the fan ideal for challenging industrial applications.
Three-phase motor design

Three-phase motor design

While most axial fans use single-phase motors with 4 slots, Noctua's industrialPPC fans feature a three-phase design with 6 slots, which provides smoother transitions between the slots and thus allows for even higher running smoothness, further reduced vibrations and unprecedented energy efficiency.
Class-leading energy efficiency

Class-leading energy efficiency

While the standard NF-A14 is one of the most energy efficient 1500rpm 140mm fans on the market, the industrialPPC version's three-phase motor provides a further 10% reduction in power consumption when compared at 2000rpm.
Fibre-glass reinforced polyamide construction

Fibre-glass reinforced polyamide construction

Both the impeller and the frame of Noctua’s industrialPPC fans are made entirely from fibre-glass reinforced polyamide. This material can withstand temperatures up to 140°C and makes the fans even more robust and break-proof than Noctua’s standard fibre-glass reinforced PBT fans.
Certified IP67 water- and dust protection

Certified IP67 water- and dust protection

The motor and PCB of the IP67 version are completely cast in a special, highly heat conductive resin that combines thoroughgoing protection and effective motor heat dissipation. Complying with the ingress protection rating IP67, this fan is not only fully dust tight but also completely waterproof up to 1m water depth.
Flow Acceleration Channels

Flow Acceleration Channels

The NF-A14 impeller features suction side Flow Acceleration Channels. By speeding up the airflow at the crucial outer blade regions, this measure reduces suction side flow separation and thus leads to better efficiency and lower vortex noise.
AAO Frame

AAO Frame

Noctua's AAO (Advanced Acoustic Optimisation) frames feature integrated anti-vibration pads as well as Noctua's proprietary Stepped Inlet Design and Inner Surface Microstructures, both of which further refine the fan's performance/noise efficiency.
Stepped Inlet Design

Stepped Inlet Design

Noctua's Stepped Inlet Design adds turbulence to the influx in order to facilitate the transition from laminar flow to turbulent flow, which reduces tonal intake noise, improves flow attachment and increases suction capacity, especially in space-restricted environments.
Inner Surface Microstructures

Inner Surface Microstructures

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

Integrated anti-vibration pads

Integrated anti-vibration pads made from extra-soft silicone minimise the transmission of minute vibrations while maintaining full compatibility with all standard screws and other mounting systems.
SSO2 Bearing

SSO2 Bearing

The NF-A14 industrialPPC 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

Metal bearing shell

In order to guarantee the highest possible degree of manufacturing precision, minimum tolerance and excellent long-term stability, the NF-A14 industrialPPC sports a CNC milled bearing shell made entirely from brass.
Custom-designed PWM IC with SCD

Custom-designed PWM IC with SCD

Supporting fully automatic PWM speed control, the NF-A14 industrialPPC uses Noctua's custom-designed NE-FD2 PWM IC for three-phase motors. The NE-FD2 integrates Noctua's proprietary Smooth Commutation Drive (SCD) technology, which suppresses PWM switching noises and thus makes the fan quieter at lower speeds.
6-year manufacturer’s warranty

6-year manufacturer’s warranty

Noctua fans are renowned for their impeccable quality and outstanding longevity. Like all Noctua fans, the NF-A14 industrialPPC features an MTTF rating of more than 150.000 hours and comes with a full 6-year manufacturer’s warranty.
Customisable for industry clients

Customisable for industry clients

For industry clients, various features, certificates, packaging options and accessories can be customised on requests. For example, we can provide 24V versions, different connectors and speeds, different cable length or UL and TÜV certification. Please feel free to contact us for customised offers!
NF-A14 industrialPPC-2000 IP67 PWM
FAN Specification
Size
140x140x25 mm
Mounting hole spacing
124,5x124,5 mm
Connector
4-Pin PWM
Bearing
Blade Geometry
Frame Technology
AAO
Rotational Speed (+/- 10%)
2000 RPM
Min. Rotational Speed (PWM, +/-20%)
500 RPM
Acoustical Noise
31,5 dB(A)
Static Pressure
4,18 mm H₂O
Max. Input Power
2,16 W
Max. Input Current
0,18 A
Voltage
12 V
MTTF
> 150.000 h
Scope of Delivery
  • Fan
  • 4 Fan Screws
Warranty
6 years
Ingress Protection
IP67
Material
Fibre-glass reinforced polyamide
Motor type
NF-A14 industrialPPC-2000 IP67 PWM
A-Series fans
Video Reviews
The following video reviews have not been created by Noctua. Responsibility for the information and views expressed in the videos lies entirely with the authors.
language
12.05.2016 // Hardware.Info
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NF-A14 industrialPPC-2000 IP67 PWM Review

The efficiency test, in which we test what the airflow is at a set noise level of 30 dB(A), is in our opinion the most important, because we prefer to see coolers that are silent and cool well. The best ones are the Noctua NF-A14 industrialPPC-2000 140mm IP67 PWM and the Noiseblocker NB eLoop 140mm 1200 rpm PWM, which produce 32.7 cfm at 30 dB(A). The first one is relatively expensive, but aimed at industrial application and moreover waterproof.
Test verdict: "The most efficient and thus "best" 140mm fans are the Noctua NF-A14 industrialPPC-2000 140mm IP67 PWM and the Noiseblocker NB-eLoop 140mm 1200rpm PWM. Both deserve an Ultimate award." (Farzin Parham, Hardware.Info)
27.01.2015 // DDWorld.cz
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NF-A14 industrialPPC-2000 IP67 PWM Review

REDUX verze stále o parník překonávají provozní kvalitou drtivou většinu ventilátorové produkce. Přitom pořád nabízejí 6 let záruky, vynikající výkon při nízké hlučnosti a zkrátka se musíte obejít bez nejnovějších vychytávek a rozsáhlého příslušenství (musíte si vybrat napevno danou verzi s otáčkami a PWM). Jenže finanční úspora je také velká. Běžně jsou REDUX verze o 120-150 korun levnější, než jejich hnědé luxusnější verze, což už je pro řadu uživatelů dost znatelná úspora. V případě nákupu tří kusů 120mm hnědých modelů NF totiž zaplatíte tolik (1500 korun), že za to máte 4 kusy REDUX verze a to už se při osazování skříně u mnohých prostě počítá. Ovšem právě jen do skříní bych ty REDUX verze doporučil (na to jsou i určeny). Pokud je chcete na chladič CPU, či výměník vodního chlazení, na to jsou tu speciálně optimalizované ty hnědé modely a vyplatí se do nich jít. Pokud jde o ty IndustrialPPC model. Pro drtivou většinu domácích uživatelů nebudou zajímavé. Jsou hlučné. Ale to je vlastně jejich jediná nevýhoda a je to vyváženo ohromným průtokem vzduchu a tedy obrovským výkonem, při TOP kvalitě zpracování, zvýšené odolnosti proti vlhkosti a prachu a záruce dlouhé životnosti. Cena je ovšem hodně vysoká (stojí o 130-140 korun víc než hnědé verze). Ale pokud vám jde předně o ten výkon a chcete si být jisti, že vám to i chvíli vydrží, nemůžete s nimi udělat chybu. Jsou opravdu famózně výkonné. Strčte je na výměník vodního chlazení a poskytnou vám maximální účinek - ale nepočítejte s tím, že budou tiché.
Test verdict: "Obě nové řady jsou velmi vítaným zpestřením nabídky ventilátorů." (Jan Stach, DDWorld.cz)
09.12.2014 // Hardware-360
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NF-A14 industrialPPC-2000 IP67 PWM Review

Overall, these new Noctua IndustrialPPC fans are quite capable and surprisingly will not drive you crazy with the noise despite the higher RPM. The NF-A14 in particular is remarkably quiet for a fan spinning at 2000RPM. The Higher RPMs also provide users with much more range in high performance systems compared to the standard Noctua fans which are more approriate at lower RPM ranges. As usual, the only downside is that these Noctua IndustrialPPC fans cost more than the competition and despite lacking extras out of the box, a long 6-year warranty from Noctua more than makes up for it. Besides, the Ingress Protection ratings for these fans are impressive.
Test verdict: "Both the NF-F12 and NF-A14 IndustrialPPC fans from Noctua receive the Hardware 360 Editor’s Choice award." (Ron Perillo, Hardware-360)
11.11.2014 // FunkyKit.com
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NF-A14 industrialPPC-2000 IP67 PWM Review

So if the coffee and cream color of Noctua's fans were the only thing holding you back from enjoying the highest quality in cooling components for your computer, well jump up for joy cause the new colors offered by Noctua are awesome. With the added benefit of style, no quality was sacrificed and these line of fans performed well and a few of them at max RPM could barely be heard over the ambient noise. The braided cables are nice touch also. The fans carry a 6-year warranty offered by Noctua. These fans perform exceptionally well and look good while doing so. These fans move massive amounts of air and achieve very reasonable dB levels at maximum RPM.
Test verdict: "The new colors offered by Noctua are fantastic. The Redux models are premium quality, quiet and priced competitively. The industrialPPC models are heavy duty models that will meet the demands of the most extreme conditions." (Chris McCart, FunkyKit.com)
16.10.2014 // OverclockersClub.com
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NF-A14 industrialPPC-2000 IP67 PWM Review

The first, the redux line, is taking its naming very literally. The redux line is reaching to the back of the top shelf, dusting off all of the oldies but goldies, and re-releasing them as a baseline product to catch the attention of the more economically inclined. However, there is one twist. A brand new, and long overdue, color scheme update. The new redux models are all coming in a light/dark contrast gray, paying homage to the original light/dark contrast brown that was their roots. Now, I know what you're thinking, "why older, out of date fans?". My answer is simple: Though the models are older, they are also what put Noctua where they are today and should not be underestimated. [...] The grand finale is the industrialPPC series. There are not likely fans at the 140mm size that can match these thermal killing speed demons. They are an overclocker's dream. Throw a couple of these at a water cooler and heat dissipation will never be better. At nearly 50 Celsius I had nothing but head room for additional overclocking.
Test verdict: "All of these fans are great, even if it is their second unveiling. I think that with the release of the industrialPPC and the redux, Noctua has every base covered. Easy to please base users who don't have much need for insane power or quiet, sound enthusiasts who need to work with little to no sound, and those who have a need for speed to keep their CPUs from frying during heavy overclocking." (Allen Woo, OverclockersClub.com)
06.09.2014 // modding.fr
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NF-A14 industrialPPC-2000 IP67 PWM Review

La gamme Industrial PPC s’inspire de deux ventilateurs, à savoir le NF-F12 et le NF-A14. Donc sans conteste le haut de gamme de chez Noctua. Conçues pour un environnement industriel, ils sont dotés d’un châssis en polyamide renforcé fibre de verre. Ils embarquent un moteur avec alimentation triphasée, ce qui assure un fonctionnement plus souple, génère moins de vibration et accroît le rendement énergétique. De part sa protection à la poussière et à l’eau, cette gamme répond aux normes de protection IP 52. Noctua propose dans cette série, des ventilateurs répondant aux normes IP67. Mais aussi des ventilateurs avec prise 3-pins ou prise 4-pins PWM. Ils tournent à 2000 tr/min soit 500 tr/min de plus que les versions classiques. La marque propose même une vitesse de rotation à 3000 tr/min! Le circuit PWM est associé au circuit intégré NE-FD2 PWM IC. Le câble est revêtu d’une gaine tressée très serrée ne laissant pas apparaître la couleur des fils, il mesure 400 mm. Tout comme la gamme Redux, point de bundle excessif… rien que le nécessaire : 4 vis. Du gris on passe au noir mat avec des silentblocs d’une couleur marron plus prononcée que la gamme classique. Ils bénéficient tous d’une garantie de 6 ans.
Test verdict: "Du coté de la série Industrial PPC, on tape un cran au-dessus avec déjà des ventilateurs qui sont dans le haut de gamme de Noctua! avec du coup une orientation refroidissement radiateur (aircooling ou watercooling) Tout est renforcé!!! la structure avec l’utilisation de Polyamide renforcé fibre de verre (versus PBT), le moteur avec un tri-phasé (versus mono-phasé) et une norme qui répond aux exigences IP 52 voire IP 67." (Bertrand Curras, modding.fr)
27.07.2014 // Vortez.net
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NF-A14 industrialPPC-2000 IP67 PWM Review

Noctua has extended their fan line into radiator territory - these are powerful fans with the right form factor for rads. The relatively low prices, the ruggedness, the standard IP52 protection, the availability of IP67 protection, the long MTBF and the low, low current draw of these fans make them perfect for industrial uses as well. Finally, the color change is just what a number of people have asked for. And Noctua did not stop with increasing their 1500 RPM fans to 2000. The 3000 RPM models are where the industrialPPC fans really shine. With a simple 50% rise in output, these fans really punch out the air, both in flow and with pressure. The NF-A14 iPPC-3000 more than doubles its static pressure as it moves from 2000 RPM to 3000.
Test verdict: "Noctua has taken their game to a whole new level by introducing a superb product which is packed full of value. After our findings we are pleased to hand out our Elite Award." (Ed Hume, Vortez.net)
26.06.2014 // Conseil Config
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NF-A14 industrialPPC-2000 IP67 PWM Review

La gamme IndustrialPPC se caractérise par des ventilateurs étudiés pour des environnements industriels demandant un refroidissement conséquent dans des conditions qui peuvent être difficiles, beaucoup de poussière ou des risques d'éclaboussures.
Test verdict: "Conçue pour la performance et la solidité avant tout, cette gamme s'oriente vers une utilisation dans un cadre industriel ou pour les fanas de performance. Si vous cherchez des ventilateurs pour refroidir votre processeur, que seul les performances comptent et que vous ne vous souciez pas du bruit généré alors vous pouvez sans hésiter vous tourner vers un Noctua IndustrialPPC" (Christian Marchini, Conseil Config)
12.03.2014 // PureOverclock.com
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NF-A14 industrialPPC-2000 IP67 PWM Review

Ultimately, Noctua makes a great fan, but they fit best with people who have the higher budgets for them. [...] I never see the level of quality in manufacturing from other brands that Noctua puts in their product and they match that with a massive 6 year warranty. Because of this, we happily award all fans in this round up with the PureOverclock Great Hardware Award!
Test verdict: " These are great quality fans for those who prefer elegance over flashy appearance and don't mind spending a premium for them." (Josh Jackson, PureOverclock.com)
06.02.2014 // RelaxedTech.com
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NF-A14 industrialPPC-2000 IP67 PWM Review

Looking at the full load temperatures, our first configured NH-D15 with two NF-A14 iPPC-3000RPM PWM manages to shock us by providing a 4 Celsius difference over the stock fans that come with the NH-D15. Our second configured NH-D15 with two NF-A14 iPPC-2000RPM PWM still manages to impress us by providing a 2 Celsius difference over the stock fans of the NH-D15. This chart shows exactly what Noctua's NF-A14 industrialPPC fans are truly capable of. The NH-D15 with the stock fans is more than enough for anything but the NF-A14 iPPC fans are completely on a different league than the NF-A15 PWM. [...] Overall, Noctua has done a superb job designing the industrialPPC fans and as always, the packaging is as premium as it can get. I usually nitpick when I'm reviewing products but this time I could not think of anything bad about the NF-A14 iPPC fans. The new Noctua NF-A14 industrialPPC fans are hands down the best fans that I have ever tested and believe it or not, I have tested the majority of the fans that are out there but never been as impressed as the new NF-A14 industrialPPC fans from Noctua. I strongly recommend the new NF-A14 industrialPPC fans from Noctua if you want the highest quality fans that you can buy. The customer service is a bonus if you ask me because if the fans ever stop working, Noctua will send you new ones free of charge!
Test verdict: "We strongly recommend the Noctua NF-A14 industrialPPC fans to anyone who's looking for the best of the best." (Henry Peshkepija, RelaxedTech.com)

Information Sheet (PDF)

Can industrialPPC fans be used with fan controllers and resistor cables (Low-Noise Adaptors)?

Noctua recommends not to use industrialPPC fans with common PC fan controllers, resistor cables (Low-Noise Adaptors) or other devices such as potentiometers that work by applying (variable) resistance rather than actually generating different voltages such as a laboratory power supply does. Due to the higher internal resistance of the industrialPPC fans’ three phase motor, applying additional resistance will cause the fans not to start (e.g. with Low-Noise Adaptors) or to have high starting speeds (e.g. with most common PC fan controllers). Please note that the industrialPPC fans feature starting voltages between 5.5V and 6V and can be run at these voltages on devices such as laboratory power supplies or mainboard fan controllers which actually generate lower voltages rather than applying resistance. Noctua thus recommends to use either PWM or voltage based mainboard fan control or laboratory/industrial power supplies for controlling the speed of industrialPPC fans.

4-pin PWM 3-pin
Mainboard fan control PWM based yes no
Mainboard fan control voltage based yes yes
Resistor cables (Low-Noise Adaptors) no no
Common PC fan controllers no
(high starting speed)
no
(high starting speed)
Laboratory/industrial power supplies yes yes

I get a CPU fan error despite the fan is running!

Some mainboards display a CPU fan error when the fan speed falls below a certain threshold, e.g. 900rpm. If you want to run the fan below this speed (e.g. using the supplied U.L.N.A.), please adjust the threshold in the BIOS or disable CPU fan error warning.

Can I disassemble my fan for cleaning (or other purposes, e.g. painting)?

In order to ensure flawless operation over many years of usage, all Noctua fans come with a premium grade SSO bearing, which is fully sealed to prevent the entering of fine dust particles. Please note that the fan is not designed to be taken apart by the user. Removing the impeller from the frame will break the sealing of the bearing and results in a loss of warranty.

It is thus recommended to clean your fans using a duster, slightly moist tissue or canned air. Please be careful not to use too much force in order to prevent any damage to the fan. Please don’t use a vacuum cleaner as this may apply excessive force to the fan.

Can I paint my Noctua fan in order to change its color?

Since even small variations in the layer of paint can lead to an imbalance of the impeller, resulting in vibrations, higher noise levels, increased stress on the bearing and thus reduced lifespan, we do not recommend painting the fan. Please note that for the reasons stated above, painting the fan will void your warranty.

Can I run 4-pin PWM fans on 3-pin fan headers?

PWM fans come with a 4-pin connectors for fully automatic speed control via your mainboard’s 4-pin PWM fan headers. Please note that 4-pin fans can also be connected to your mainboard’s 3-pin fan headers though. When connected to 3-pin fan headers, the fan will run at full speed (unless the mainboard supports voltage based speed control).

What pin configuration do Noctua 12V fans use?

All Noctua fans feature the standard pin-configurations set out in the Intel and AMD specifications. These standard pin-configurations are used on most mainboards and fan controllers today:

pin configuration

How can I find out the direction of airflow and sense of rotation?

When looking at the fan so that the circular sticker with the Noctua logo is facing you, the direction of airflow is towards you and the sense of rotation is clockwise:

P14

How should I clean my Noctua fan?

Fans inside computer cases tend to accumulate dust over longer periods of usage. In order to maintain maximum performance, please clean your fans regularly using a duster, slightly moist tissue or canned air. Please be careful not to use too much force in order to prevent any damage to the fan. Please do not use a vacuum cleaner as this may apply excessive force to the fan and do not put the fan under running water as water residues inside the motor may lead to short circuits.
In order to ensure flawless operation over many years of usage, Noctua’s premium grade SSO bearings are fully sealed to prevent the entering of fine dust particles. Please note that the fan is not designed to be taken apart by the user. Removing the impeller from the frame will break the sealing of the bearing and results in a loss of warranty.

My Noctua PWM fan starts to spin when the PC boots but then stops, what is wrong?

Some mainboards feature 4-pin fan headers that actually don‘t use a PWM signal on Pin 4 to control the fan speed but rather reduce the voltage on Pin 2 (like a standard 3-pin fan header). In this case, it may occur that the mainboard reduces the voltage so much that the fan stops. Please refer to your mainboard manual to check whether or not your mainboard has 4-pin fan headers that control the fan speed by reducing voltage on Pin 2 rather than by changing the PWM duty cycle on Pin 4:

4 pin fan header types

Note that mainboard manufacturers use different terms to indicate that Pin 4 is not being used for PWM control (e.g. “+5V”, “VCC” or “NC”), but if one of these terms is used, you can be sure that the fan header does not support PWM. If Pin 4 is described as “Speed Control” or “PWM” or the like, you can be sure that the fan header supports PWM.

Unfortunately, the description of Pin 2 is not always a clear indication as some manufacturers use terms such as “Fan PWR” or “Power” for both types of fan headers. However, if Pin 2 is described as “Speed Control”, you can also be sure that the fan header does not support PWM based speed control. If Pin 2 is described as “+12V”, this is a clear indication that the fan header supports PWM.

Please also note that in some cases, the descriptions of the pin layouts in the mainboard manuals may not be correct and some models actually allow you to switch the fan headers from voltage control mode to PWM control mode in the BIOS even though the pin descriptions do not indicate PWM support. We thus recommend to look for these options in the BIOS before taking other measures. In case of doubt, please contact your mainboard manufacturer.



To resolve the issue, you can:

  1. Choose a higher fan speed profile in the BIOS (e.g. „normal“ instead of „silent“, etc.) or deactivate automatic fan speed control and use a Low-Noise Adaptor instead.

  2. Use the mainboard‘s fan speed control software or 3rd party tools like Speedfan to regulate the fan speed. Unlike BIOS based fan speed control, the supplied software usually checks whether the fan has stopped and increases voltage accordingly or at least offer more options to set up the fan properly.

  3. If your mainboard features other 4-pin fan headers that use PWM for speed control, you can run multiple fans from these headers using Y-split cables. Make sure not to exceed the specified maximum power draw of the fan headers (usually 10-12W) though.

My Noctua PWM fan runs at a much higher minimum speed than advertised, what is wrong?

The specified minimum speed refers to the speed at 20% PWM duty cycle. There can be several reasons why the fan doesn‘t go as low as indicated:

  1. Many mainboards do not go below 40%, 50% or even 60% PWM duty cycle on case fan headers. Please refer to your mainboard manual to verify whether the fan header actually goes down to 20% duty cycle. If that's not the case, in some cases you can use the fan speed control software supplied with your mainboard to overcome these limitations and reduce the fan speed even further. However, 3rd party tools like SpeedFan offer greater flexibility and better options to work around the limitations imposed by the mainboard vendors.

  2. Some mainboards feature 4-pin fan headers that actually don‘t use a PWM signal on Pin 4 to control the fan speed but rather reduce the voltage on Pin 2 (like a standard 3-pin fan header). As the fan speed at minimum voltage is usually higher than the speed at 20% PWM duty cycle, the fan can not reach as low minimum speeds under voltage control as under PWM control. Please refer to your mainboard manual to check whether or not your mainboard has 4-pin fan headers that control the fan speed by reducing voltage on Pin 2 rather than by changing the PWM duty cycle on Pin 4:

    4 pin fan header types

    Note that mainboard manufacturers use different terms to indicate that Pin 4 is not being used for PWM control (e.g. “+5V”, “VCC” or “NC”), but if one of these terms is used, you can be sure that the fan header does not support PWM. If Pin 4 is described as “Speed Control” or “PWM” or the like, you can be sure that the fan header supports PWM.

    Unfortunately, the description of Pin 2 is not always a clear indication as some manufacturers use terms such as “Fan PWR” or “Power” for both types of fan headers. However, if Pin 2 is described as “Speed Control”, you can also be sure that the fan header does not support PWM based speed control. If Pin 2 is described as “+12V”, this is a clear indication that the fan header supports PWM.

    Please also note that in some cases, the descriptions of the pin layouts in the mainboard manuals may not be correct and some models actually allow you to switch the fan headers from voltage control mode to PWM control mode in the BIOS even though the pin descriptions do not indicate PWM support. We thus recommend to look for these options in the BIOS before taking other measures. In case of doubt, please contact your mainboard manufacturer.


    If your mainboard features other 4-pin fan headers that use PWM for speed control, you can run multiple fans from these headers using Y-split cables. Make sure not to exceed the specified maximum power draw of the fan headers (usually 10-12W) though.

I'm experiencing fan speed issues with my motherboard from Supermicro, what can I do?

The BIOS of many motherboard models from Supermicro expects a certain minimum fan speed (usually 700rpm), which is higher than the minimum fan speed that can be achieved with Noctua's PWM fan models. The BIOS may interpret the low minimum RPM of Noctua fans as a fan error and thus try to run the fan at 100% for a short period before going back to automatic control.. This can result in oscillating fan speeds and fan speed warnings in the BIOS or the fan management console.

Unfortunately there is usually no option to set a lower minimum value that would suit the low minimum speed of Noctua PWM fans.The issue can thus only be resolved by either disabling automatic fan speed control in BIOS, which will cause the fans to run at a constant speed, or by requesting a modified BIOS file from Supermicro, which takes the minimum fan speed of Noctua fans into account (charges might apply).

Can I use Low-Noise Adaptors with y-cables / multiple fans?

Yes, Low-Noise Adaptors (L.N.A.s) can be used with y-cables, but please make sure to use one L.N.A. per fan and to place the L.N.A.s between the y-cable and the fans as shown below. Never use one L.N.A. for two (or more fans) by placing it between the mainboard and the y-cable!

D15S

Can I use Low-Noise Adaptors for industrialPPC fans?

No, Low-Noise Adaptors are not compatible with Noctua’s industrialPPC series.

Which Noctua 140mm fans are optimised for airflow, which are optimised for static pressure?

Noctua only distinguishes between airflow optimised and pressure optimised fans in its 120mm range (see this page for details). For 140mm fans, there is no such distinction: Both the NF-A14 and the NF-P14 redux models are true all-rounders that provide outstanding levels of airflow and static pressure. Either of them works excellent both for case cooling and for use on radiators and heatsinks.

How can I check if my 4-pin fan header supports PWM?

Some mainboards feature 4-pin fan headers that actually don‘t use a PWM signal on Pin 4 to control the fan speed but rather reduce the voltage on Pin 2 (like a standard 3-pin fan header). As the fan speed at minimum voltage is usually higher than the speed at 20% PWM duty cycle, the fan can not reach as low minimum speeds under voltage control as under PWM control. Please refer to your mainboard manual to check whether or not your mainboard has 4-pin fan headers that control the fan speed by reducing voltage on Pin 2 rather than by changing the PWM duty cycle on Pin 4:

4 pin fan header types

Note that mainboard manufacturers use different terms to indicate that Pin 4 is not being used for PWM control (e.g. “+5V”, “VCC” or “NC”), but if one of these terms is used, you can be sure that the fan header does not support PWM. If Pin 4 is described as “Speed Control” or “PWM” or the like, you can be sure that the fan header supports PWM.

Unfortunately, the description of Pin 2 is not always a clear indication as some manufacturers use terms such as “Fan PWR” or “Power” for both types of fan headers. However, if Pin 2 is described as “Speed Control”, you can also be sure that the fan header does not support PWM based speed control. If Pin 2 is described as “+12V”, this is a clear indication that the fan header supports PWM.

Please also note that in some cases, the descriptions of the pin layouts in the mainboard manuals may not be correct and some models actually allow you to switch the fan headers from voltage control mode to PWM control mode in the BIOS even though the pin descriptions do not indicate PWM support. We thus recommend to look for these options in the BIOS before taking other measures. In case of doubt, please contact your mainboard manufacturer.


If your mainboard features other 4-pin fan headers that use PWM for speed control, you can run multiple fans from these headers using Y-split cables. Make sure not to exceed the specified maximum power draw of the fan headers (usually 10-12W) though.

Which Noctua fan or CPU cooler should I buy? How to choose the right model?

Not sure which Noctua product to buy? Our detailed buying guides for fans and CPU coolers help you to choose the model that works best for you.

Can Noctua fans be used to replace noisy stock fans in NAS devices?

Noctua fans such as the 40, 60, 80 or 92mm NF-A series models are ideal for replacing noisy stock fans in NAS devices in order to make them quieter and thousands of users have managed to significantly reduce the noise levels of their NAS units this way. However, while it is easy and straightforward to replace the fans in some cases, it can be very difficult in others, so Noctua strongly recommends that users carefully research if it is possible to easily replace the fan(s) of their NAS device before purchasing a Noctua fan for this purpose. Some of the common issues that can occur when replacing NAS fans are:

  • Different pin assignment: Whereas Noctua fans use the standardised pin assignment for PC fans (see this FAQ for details), some NAS units use different assignments. For example, some devices have the power and GND or rpm and PWM pins swapped. Therefore please carefully verify that your NAS device uses the same pin assignment as standard fans. Experienced users may also change the pin assignment by cutting and resoldering the fan cables, but please note that this will void your Noctua manufacturer’s warranty.
  • Different pin functions: Noctua fans use the standardised pin functions for PC fans (see this FAQ for details); however, some NAS units use fans where certain pins serve a different function. For example, some devices use the RPM pin for “power good” signals. Therefore please carefully verify that your NAS device uses the same pin functions.
  • Firmware speed control: Some NAS devices demand a certain maximum or minimum fan speed. If the new fan doesn’t have the same or similar maximum or minimum speed, the device may display errors or even shut down.
  • Different starting voltage: Most NAS devices use voltage-based speed control. If the new fan has a higher starting voltage than the original fan, it may not start up right away. This may lead the NAS device to display errors or even shut down because it suspects a fan failure.
  • Different power draw: Some NAS devices monitor the fan’s power draw. If the new fan has a lower power consumption than the stock fan, the device might display errors or even shut down.

Please note that most NAS manufacturers don’t provide detailed documentation regarding fan compatibility and control, so users who want to replace the fans of their devices usually have to rely on “How to” guides, blog and forum posts or video tutorials. For example, there are excellent video tutorials available for changing the fans in popular Synology NAS models (DS416j, DS1515+ and DS1812+ in English, DS416/DS415/DS916/DS216/DS214 and DS1515+ in German). Please also note that fan compatibility and control can vary from model to model and even from revision to revision even if the devices stem from the same manufacturer. As a result, it is important to make sure that the information or guidelines you rely on when replacing your NAS fan are applicable to your specific model as well as your specific hardware and firmware revision.

Due to the possible issues listed above, Noctua recommends that only experienced users attempt to replace their NAS fans. Please note that since there are so many different NAS models and most of them lack documentation for aspects such as fan compatibility and control, Noctua customer support cannot assist you with compatibility issues when replacing NAS fans. Please contact your NAS manufacturer for any questions regarding aspects such as the device’s pin alignment or fan monitoring and control.

Can I use Noctua fans in my system from Acer, Apple, Dell, HP, Lenovo or other major brands?

Noctua 12V fans comply with the established specifications for standard PC systems issued by Intel and AMD. Systems from Acer, Apple, Dell, HP, Lenovo or other major brands often deviate from these specifications e.g. by using proprietary fan headers, custom pin-alignments or pin-configurations, different methods of fan speed control, etc. This can lead to compatibility issues when using Noctua fans in systems from said brands. Some of these problems can be avoided with some technical knowledge, but especially BIOS related issues (e.g. errors or shutdowns due to low fan speed) can often not be resolved. As a result, Noctua does not officially support systems from Acer, Apple, Dell, HP, Lenovo or other major brands.

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