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Avec plus de 100 récompenses et recommandations décernées par la presse internationale et les sites internet spécialisés, le NF-A15 est sans nul doute un des plus célèbres ventilateurs 140mm Noctua. Grâce à son imposant châssis arrondi de 150mm pourvu d’orifices de fixation standards (écartement des trous de 105mm), il est idéal pour équiper les radiateurs pour CPU tels que les célèbres NH-D15, NH-D15S ou NH-U14S. La version chromax.black.swap conserve les niveaux de performance de refroidissement et de silence du célèbre NF-A15 tout en offrant une palette de couleurs associant le look 100% black du ventilateur aux silentblocs anti-vibrations rouges, blancs, bleus, verts, jaunes ou noirs. Il devient ainsi aisé de coordonner le ventilateur avec le reste des éléments de la configuration... Pour une customisation plus poussée, un large choix d’attaches anti-vibrations et de câbles colorés vous est aussi proposé en option. Avec un roulement premium SSO2, un MTTF de plus de 150.000 heures et une garantie fabricant de 6 ans, le NF-A15 HS-PWM chromax.black.swap s’impose comme le choix idéal des utilisateurs qui accordent à une esthétique irréprochable autant d’importance qu’à la qualité et la performance sans compromis.
Détails
NF-A15 : un design éprouvé et plébiscité

NF-A15 : un design éprouvé et plébiscité

Bénéficiant de plus de 100 récompenses et recommandations de la part de la Presse internationale, le NF-A15 s'est imposé comme LA solution haut de gamme pour les besoins en ventilation 140mm. Son efficacité reconnue a su convaincre des dizaines de milliers de clients du monde entier.
Série chromax.black.swap

Série chromax.black.swap

Offrant un large choix de couleurs, les ventilateurs Noctua issus de la série chromax.black.swap peuvent être customisés grâce aux silentblocs anti-vibrations inclus mais aussi à l’aide des attaches et câbles optionnels. Ces modèles sont ainsi parfaits pour les passionnés recherchant des ventilateurs hauts de gamme pouvant intégrer de manière harmonieuse et esthétique des thèmes couleurs de configuration tels que 100% Black, noir et blanc ou noir et rouge.
Silentblocs anti-vibrations colorés

Silentblocs anti-vibrations colorés

Le NF-A15 HS-PWM chromax.black.swap est livré avec 8 silentblocs noirs, blancs, rouges, verts, bleus ou jaunes qui permettent de créer avec grande liberté un jeu de couleurs sur le ventilateur et de le coordonner ainsi avec les autres composants et les configurations les plus en vogue.
Câbles optionnels colorés

Câbles optionnels colorés

Les ventilateurs Noctua de la ligne chromax utilisent un système de câblage modulaire et sont livrés avec un câble noir pré-gainé de 30cm : le NA-EC1. Pour ceux qui souhaitent une esthétique encore plus personnalisée, sachez que des câbles de 30cm NA-EC1, ainsi que leurs homologues en Y (appelés NA-YC1) sont disponibles à la vente dans les couleurs suivantes : blanc, rouge, bleu, vert et jaune.
Attaches anti-vibrations colorées optionnelles

Attaches anti-vibrations colorées optionnelles

En complément des silentblocs anti-vibrations inclus avec les ventilateurs, les utilisateurs peuvent acheter les attaches anti-vibrations NA-SAV2, issues de la ligne chromax et qui permettent de fixer - rapidement, efficacement et sans générer de vibrations - les ventilateurs sur des boîtiers pourvus de trous de fixation standards.
Cadre arrondi 140mm avec une largeur de 150mm

Cadre arrondi 140mm avec une largeur de 150mm

Le NF-A15 est un ventilateur spécialement conçu pour les derniers ventirads pour CPU. Malgré une largeur de 150mm, prévue pour les ventirads les plus optimisés, la hauteur (140mm) lui permet de garder un profil ramassé offrant une compatibilité boîtier meilleure. Les orifices prévus pour la fixation restent standards (format 120mm soit un espacement de 105mm) et font de ce ventilateur un choix idéal pour les boîtiers 120mm ou pour le refroidissement des CPUs.
Canalisateurs de flux (Flow Acceleration Channels)

Canalisateurs de flux (Flow Acceleration Channels)

La turbine des NF-A15 est munie de canalisateurs de flux sur la face succion du ventilateur. L'accélération du flux générée aux extrémités des pales permet de créer une succion plus massive, moins dispersée, et accroit ainsi l'efficacité tout en réduisant les perturbations sonores liées aux vortex.
Cadre AAO

Cadre AAO

Les cadres AAO (Advanced Acoustic Optimisation) de Noctua sont équipés de silentblocs anti-vibrations et bénéficie d'optimisations exclusives permettant de repousser encore plus loin les limites de la performance et du silence : Stepped Inlet Design and Inner Surface Microstructures.
Conception en escalier de l'admission

Conception en escalier de l'admission

La conception en escalier de l'admission de Noctua ajoute une turbulence au flux entrant permettant ainsi un passage progressif d'un flux laminaire à un flux turbulent. Ce phénomène réduit les émissions sonores initiales, améliore la cohésion du flux et augmente la capacité de succion en particulier dans les environnements où l'espace fait défaut.
Conduit de contournement à microstructures

Conduit de contournement à microstructures

Les extrémités des pales évoluant à proximité de la surface intérieure du conduit (caractérisée par la présence d'une microstructure), la séparation des flux qui s'opère au niveau de la succion est quasi inexistante. Cette optimisation permet de réduire les émissions sonores liées au mouvement des pales, améliore le flux d'air ainsi que le niveau de pression.
Roulement SSO2

Roulement SSO2

Les ventilateurs de la ligne chromax sont équipés de la seconde génération des célèbres roulements Noctua SSO, qui bénéficient ici des dernières avancées. Au cœur du SSO2, l’aimant est encore plus proche de l’axe, offrant ainsi une meilleure stabilité, précision et longévité.
Coussinets en métal

Coussinets en métal

En vue d’assurer une qualité optimale de fabrication, une bonne longévité et stabilité, les ventilateurs de la ligne chromax sont dotés d’un roulement CNC usiné en laiton massif.
Circuit intégré PWM exclusif avec SCD

Circuit intégré PWM exclusif avec SCD

Compatible avec les systèmes de contrôle de vitesse automatisé PWM, les ventilateurs de la ligne chromax sont pourvus du tout dernier circuit intégré NE-FD1 PWM qui intègre la technologie SCD (Smooth Commutation Drive). En générant des impulsions de couple moins brutales, le système SCD élimine les nuisances sonores liées aux commutations du PWM et assure ainsi une ventilation moins bruyante à vitesse réduite.
Garantie fabricant de 6 ans

Garantie fabricant de 6 ans

La réputation des ventilateurs Noctua n’est plus à faire tant pour leur qualité que pour leur étonnante longévité. Comme pour tous les modèles Noctua, les modèles de la série chromax bénéficient d’un MTBF de plus de 150 000 heures de tests et bénéficient d’une garantie totale fabricant de 6 ans.
NF-A15 HS-PWM chromax.black.swap
Spécifications ventilateur
Dimensions
140x150x25 mm
Espacement des orifices de fixation
105x105 mm
Branchement
4 broches PWM
Type roulements
Géométrie des pales
Série A avec canalisateurs de flux
Vitesse de rotation (+/-10%)
1500 RPM
Vitesse de rotation min. (PWM, +/-20%)
300 RPM
Niveau sonore
24,6 dB(A)
Pression statique
2,08 mm H₂O
Puissance consommée max.
1,56 W
Ampérage max.
0,13 A
Tension
12 V
MTTF
> 150.000 h
Volume de livraison
  • 8x silentblocs anti-vibrations NA-AVP1 chromax.black
  • 8x silentblocs anti-vibrations NA-AVP1 chromax.blue
  • 8x silentblocs anti-vibrations NA-AVP1 chromax.green
  • 8x silentblocs anti-vibrations NA-AVP1 chromax.red
  • 8x silentblocs anti-vibrations NA-AVP1 chromax.white
  • 8x silentblocs anti-vibrations NA-AVP1 chromax.yellow
  • 4x vis de fixation
Garantie
6 ans
NF-A15 HS-PWM chromax.black.swap
A-Series fans
chromax by Noctua
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.
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18.11.2017 // HardwareField.com
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NF-A15 HS-PWM chromax.black.swap test

منذ فترة بسيطة قدمت مراجعة لمشتتات Noctua الهوائية الشهيرة و كان لى تعليق بسيط ان منذ عام 2007 اى عشرة سنوات لم تقم Noctua بأى تغيير يشمل الشككل او اللون على مشتتاتها الهوائية فهى بنفس الالوان البنى و البيج . و قد كان الرد سريع من Noctua ان لديها لمسة جمالية و لا اروع مع الاحتفاظ بنفس قورة الاداء
Verdict du test: "فقد اطلقت Noctua مجموعة كبيرة من الاكسسوارات التى يمكن ان تغير شكل المشتتات الهوائية الخاصة بها و تعطيها اللمسة الجمالية و هذه الاكسسوارات قد اتت تحت اسم Chromax و التى تتيح للمستخدم تغيير شكل و الوان المشتت الخاص به و البداية كانت تخص كلا المشتتان NH-D15 و NH-U12S من خلال عدة اغطية تغطى جسم المشتت بالكامل بعدة الوان و ايضا المراوح السوداء اللون و التى يأتى معها القطع المطاطية المضادة للصدمات و بعدة الوان و كابلات تطويل كابل توصيل المراوح و ايضا كابل لتشغيل مراوح مزدوجة على رأس واحد و سوف نقدم لكم هذه المنتجات تفصيليا فى هذا الموضوع." (Ahmed Mohamed Elsayed, HardwareField.com)
14.11.2017 // HWready.it
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NF-A15 HS-PWM chromax.black.swap test

Gli sdoppiatori e le prolunghe sono qualitativamente ottimi e utili da usare sia con le ventole di questa serie sia in qualsiasi altro PC. Le ventole della serie Chromax vantano la qualità che contraddistingue Noctua ma molto attente al design, con colorazione nera e la presenza dei pad colorati a spezzare e adattarle a qualsiasi build. Per ultimi le bellissime armature per i dissipatori! Grazie ad esse la personalizzazione della propria configurazione fa un grande balzo in avanti, permettendo inoltre con alcuni modelli di poter cambiare in corso d’opera la colorazione. Insomma un altro ottimo lavoro del produttore austriaco.
Verdict du test: "La serie Chromax di Noctua è una vera e propria ventata di aria fresca da parte del produttore austriaco. Siamo abituati a considerare i loro prodotti qualitativamente superiori ma con design non proprio in corso coi tempi, da adesso quando parleremo di Noctua potremmo pensare anche ad un design “bello” e capace di adattarsi ai canoni estetici oramai richiesti dal mercato." (Mauro Santoro, HWready.it)
13.11.2017 // EnosTech.com
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NF-A15 HS-PWM chromax.black.swap test

This level of customization is definitely expensive but it is worth it. Particularly for those who want to stick with the air cooler or even would want to use Chromax line of the fans and cables on the radiators for color customization. When it comes to the air coolers, the debate is on. Form over function or vice-versa. With the recent trends in the market there is a new definition which is Form with Function and this is where the Noctua has turned the table around for their coolers with their new Chromax add-ons which have allowed the users to color customize their fans, color customize their heatsinks to the extent that even the fan extension cables and the y-splitter cables are available in 6 colors for this level of the customization. The quality is top notch and why would it not be. After all, they are coming from the Noctua.
Verdict du test: "With this level of the color customization, Noctua has turned their coolers and the fans all around and do we not love it, already! There is no surprise that the Noctua Chromax lineup has won our Must Have award." (Nauman Siddique, EnosTech.com)
11.11.2017 // Overclock3D.net
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NF-A15 HS-PWM chromax.black.swap test

Well, it's been a long time coming, but Noctua have finally realised that not everybody loves the plain aluminium aesthetic of their heat sinks, and the diarrhea brown coupled with prosthetic limb beige of their standard fans. yes it's taken a while, but my God have they hit the ball out of the park with the Chromax Range. You can now get black, white and colour swap Black heat sink covers for the top end Noctua Heat sinks, as well as their leading fans in black with a choice of colour coordinating anti vibration pads. Not only that, but you can top off the whole buiild with a choice of six colours for fan splitter and fan extension cables. We're not expecting the products in the range to be dirt cheap, but what we have learned is that with Noctua, you get the quality you pay for, so yeah, the fans may cost a few quid more than your average fan, but it is, after all, a Noctua fan.
Verdict du test: "Thanks Noctua, Thanks a bunch!" (Gary Wain, Overclock3D.net)
07.11.2017 // TechUniverse.it
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NF-A15 HS-PWM chromax.black.swap test

Comprare questo dissipatore per poi comprare una delle cover sopra citate e per poi comprare una ventola da sostituire, possiamo arrivare ad un prezzo piuttosto esoso. L’unico consiglio che posso darvi, se proprio volete cambiare le ventole di questo dissipatore, è di acquistare una sola ventola Noctua NF-A15 HS-PWM chromax.black.swap. Il dissipatore Noctua NH-D15 ha originariamente due ventole, ma anche se ne acquistate una sola da collocare al centro del dissipatore, in realtà le temperature massime saranno solo di 2 o 3 gradi in più ma rispermierete il costo di una seconda ventola. Se volete acquistare questo dissipatore nuovo, sappiate che uno tra i più potenti prodotti di raffreddamento ad aria per processori Intel e AMD. Poi, se vorrete cambiare la sua estetica con l’acquisto di una cover chromax e con l’acquisto di una ventola chromax da 140mm, la scelta è solo vostra.
Verdict du test: "Cover e ventola per dissipatore Noctua NH-D15 della nuova serie chromax per aggiungere più colore a questo pluri-premiato dissipatore." (TechUniverse.it)
03.11.2017 // RealHardTechX.com
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NF-A15 HS-PWM chromax.black.swap test

Noctua pone en manos de los usuarios un producto total, que integra la tecnología más puntera dentro del mejor high-end informático, que proporciona un excelente ratio rendimiento / sonoridad, una espectacular y estricta calidad de construcción y una increible imagen, flexible hasta el extremo, que convierte la personalización en el sueño del más enfermo de los entusiastas. Soberbio ventilador a un precio muy contenido teniendo en cuanta la gama TOP a la que pertenece. Un "must have".
Verdict du test: "Distinguimos al ventilador Noctua NF-A15 HS-PWM Chromax.black.swap con nuestro premio RealHardTechX Gold Award y recomendamos su compra a todos nuestros lectores." (José Romero, RealHardTechX.com)
02.11.2017 // Unboxing Treatment
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NF-A15 HS-PWM chromax.black.swap test

In short, Noctua Chromax.black.swap fans are the standard fans painted in black with the inclusion of the colored anti-vibration pads. This means the Chromax fans are capable of providing the legendary cooling performance from the standard edition fans.
Verdict du test: "The black fan frame combined with the anti-vibration pads in six colors give users a subtle but customizable computer component to match their overall PC builds' color schemes. You no longer need to sacrifice either your PC's performance, or its aesthetic with the new Chromax fans." (Chan Long Yin, Unboxing Treatment)
31.10.2017 // XtremeSystems.org
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NF-A15 HS-PWM chromax.black.swap test

COLORS!!! That’s right. NOCTUA is finally giving consumers a broad range of colors to customize their fans beyond brown or beige (I suppose there were those grey colors too). Personally, all it took for me to fall in love with a NOCTUA fan was to see how it performed in person, but I totally understand people who don’t go in on one of them because of the color scheme. Now there are Chromax accessories that allow the user to customize each fan to have a splash of color that matches a build better, while still having the professional look that comes from having a NOCTUA fan over a flashy LED fan. For the modding crowd, I think Chromax is where the bread and butter lies with these recent releases from Noctua. Now, finally, the entire enthusiast PC community can quit griping about Noctuas only coming in brown! You can get the best fans out there in customizable color schemes. The Chromax accessories bring a flash of color to your builds. A-series fans can truly be well-dressed, and spice up your rig. And because they are made of the same soft foam as the brown originals, they do just as well at cutting down vibrations.
Verdict du test: "One of my favorite things about Noctua is how quiet its fans are without sacrificing thermal performance. Noctua pushes the boundaries of continually making improvements in all aspects of its products, and the latest from Noctua doesn't disappoint. These fans are truly knock-outs and the Chromax accessories add an awesome level of customization that Noctua fans have always lacked." (Ambrosidou Nat, XtremeSystems.org)
30.10.2017 // HardwareMAX.it
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NF-A15 HS-PWM chromax.black.swap test

La nuova linea chromax di Noctua è davvero molto bella, da un tocco di colore e vivacità all’interno del case, senza sfociare nel ridicolo, andando a trovare l’equilibrio perfetto tra funzionalità, design e classe. Il montaggio come sempre è di una facilità estrema e la cura dei dettagli, la scelta dei materiali e dei componenti è di primissima qualità.
Verdict du test: "Siamo sicuri che l’acquisto della linea chromax può soddisfare la maggior parte degli utenti che si dedicano al modding e che cercano un ottimo compromesso tra qualità e design." (Da Igor Lucifaro, HardwareMAX.it)

Feuille d'informations (PDF)

Can use the NF-A15 fan on my Noctua CPU cooler?

The NF-A15 is fully compatible with the NH-U12P, NH-C12P and NH-C12P SE14. On the NH-D14 and NH-C14, the NF-A15 fan can only be installed using optional fan clips. For this, please contact our customer service.

Does the NF-A15 PWM that comes with Noctua coolers run at a different speed (1500rpm) than the retail model (1200rpm)?

Yes, the NF-A15 PWM bundled with our heatsinks is specified to run at 1500rpm (see cooler specifications for details) and the retail model is specified to run at 1200rpm (see fan specifications for details). The 1200rpm retail model is ideal for setting up push/pull configurations in combination with the coolers’ 1500rpm stock fan because the combination of the 1500 and 1200rpm models provides a better balance of performance and noise than the combination of two 1500rpm versions. On dual-tower coolers such as the NH-D15S, we recommend to run the 1500rpm version in the center and the 1200rpm version on the front. On single-tower coolers such as the NH-U14S, we recommend to run the 1500rpm version on the front and the 1200rpm version on the back of the cooler. The NA-YC1 y-cable supplied with the retail fan can be used in order to control both fans via one PWM fan header. In this case, both fans will scale individually according to the PWM duty cycle supplied by the motherboard, e.g. they will run at ~1500/1200 respectively at 100% duty cycle, ~750/600rpm at 50% duty cycle, etc. Both at 100% and lower speeds, the speed difference between the fans reduces resonance phenomena and thus helps to achieve the best balance of performance and noise.

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 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.

The supplied y-cable is missing a wire at one of the two connectors, is it faulty?

No. As mainboards can process only one rpm-signal per fan header, it would cause problems if the cable transmitted rpm-signals of both fans. For this reason, one of the two connectors does not have an rpm wire and only the fan on the other connector will transmit an rpm signal. Automatic speed control of both fans will work independently from the second fan’s rpm signal.

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 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 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).

I get a CPU fan error using my Noctua PWM fan, is it faulty?

Noctua PWM fans feature a minimum speed of 300rpm to allow for ultra quiet operation when your CPU is at idle state and doesn’t require higher cooling performance. Some mainboards display error messages such as “CPU fan error” during the booting process when the fan speed is below a certain level. If you get such error messages using your Noctua PWM fan and if such options are available in your BIOS, please either adjust the minimum fan speed monitoring limit to 200rpm or increase the minimum PWM duty cycle. If your BIOS doesn’t offer these options, please disable CPU fan errors. For detailed information on BIOS fan settings, please consult your mainoard’s manual or contact your mainboard manufacturer.

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).

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.

Can Noctua fans be used to replace noisy stock fans in switches, routers or other network devices?

Noctua fans such as the 40, 60, 80 or 92mm NF-A series models are ideal for replacing noisy stock fans in switches, routers and other network devices in order to make them quieter and thousands of users have managed to significantly reduce the noise levels of their 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 network device before purchasing a Noctua fan for this purpose. Some of the common issues that can occur when replacing pre-installed fans are:

  • Different pin assignment: Whereas Noctua fans use the standardised pin assignment for PC fans (see this FAQ for details), some network devices use different assignments. For example, some devices have the power and GND or rpm and PWM pins swapped. Therefore please carefully verify that your 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 network devices 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 device uses the same pin functions.
  • Firmware speed control: Some network 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 network 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 device to display errors or even shut down because it suspects a fan failure.
  • Different power draw: Some network 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 network device 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. 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 fans 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 pre-installed fans in network devices. Please note that since there are so many different devices 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 pre-installed fans. Please contact your network device manufacturer for any questions regarding aspects such as the device’s pin alignment or fan monitoring and control.

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