heading

Le NF-A15 est un ventilateur haut de gamme silencieux au format 140mm avec un cadre arrondi répondant à la norme AAO (Advanced Acoustic Optimisation) de Noctua. Le cadre du NF-A15 est pourvu d’orifices pour une fixation de type 120mm (soit un espacement de 105mm) avec néanmoins un cadre surdimensionné (150mm) offrant une performance accrue pour les plus récents ventirads CPU. Bénéficiant des dernières avancées technologiques dans le domaine de l’aérodynamisme, dont les Flow Acceleration Channels, le NF-A15 repousse encore plus loin les performances de refroidissement qui ont fait la renommée du célèbre NF-P14. Le circuit propriétaire PWM IC de Noctua permettant un contrôle totalement automatisé de la vitesse ainsi que les roulements de référence SSO2 sont l’assurance d’un fonctionnement discret et d’une longévité hors pair. Complété d’un système de câblage modulaire, d’un adaptateur faible bruit (LNA) et assorti d’une garantie constructeur de 6 ans, le NF-A15 s’impose comme le ventilateur idéal pour les plus exigeants.
Détails
Digne successeur du célèbre NF-P14

Digne successeur du célèbre NF-P14

Le ventilateur NF-P14 de Noctua est devenu la référence incontournable dans le monde du PC pour tous les passionnés recherchant les meilleurs ventilateurs silencieux au format 140mm. Grâce aux nombreuses optimisations aérodynamiques successives, les NF-A15 offrent à présent une pression statique accrue et un ratio flux d'air/bruit encore meilleur que leur prédécesseur.
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.
Silentblocs anti-vibration intégrés

Silentblocs anti-vibration intégrés

Les silentblocs anti-vibration intégrés, fabriqués à base de silicone extra souple, amoindrissent la transmission des micro-vibrations tout en assurant une parfaite compatibilité avec les systèmes de fixation et les agrafes pour ventilateurs de ventirads.
Roulement SSO2

Roulement SSO2

Les NF-A15 se voient dotés de la célèbre référence du roulement Noctua : le SSO. Il s'agit ici de la toute nouvelle génération, encore plus optimisée. Le SSO2 est en effet équipé d'un aimant arrière plus proche de l'axe pour une meilleure précision, longévité et stabilité.
Coussinets en métal

Coussinets en métal

En vue d'assurer une qualité optimale de fabrication, une bonne longévité et stabilité, les NF-A15 sont dotés d'un roulement CNC entièrement usiné en laiton.
Système exclusif PWM IC avec SCD

Système exclusif PWM IC avec SCD

Compatible avec les systèmes de contrôle de vitesse automatisé PWM, les NF-A15 sont pourvus du tout dernier circuit NE-FD1 PWM IC qui intègre la technologie SCD (Smooth Commutation Drive). En générant des impulsions de couple moins brutales, le SCD élimine les nuisances sonores liées aux commutations du PWM pour une ventilation moins bruyante à vitesse réduite.
Adaptateur Faible Bruit

Adaptateur Faible Bruit

Les NF-A15 sont livrés avec un adaptateur faible bruit (L.N.A. pour Low Noise Adaptator) qui fait chuter la vitesse maximale de 1200 à 900rpm. Le L.N.A. convient aussi bien pour un fonctionnement à vitesse fixe (900rpm) que pour une utilisation en mode PWM bridé.
Options étendues de câblage

Options étendues de câblage

Le premier câble pour ventilateur, court de 20cm, permet de minimiser l'encombrement dans le cadre d'utilisations courantes. L'extension fournie, d'une longueur de 30cm, permettra quant à elle de résoudre les problèmes éventuels de distance. Ces deux câbles sont entièrement gainés.
Consommation d'énergie ultra-faible

Consommation d'énergie ultra-faible

Les NF-A15 consomment seulement 0,96W ce qui représente une réduction de consommation de plus de 20% comparée au modèle précédent. Au-delà de l'intérêt écologique, l'impact est aussi réel sur votre facture d'électricité !
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 NF-A15 bénéficient d'un MTBF de plus de 150 000 heures de tests et bénéficie d'une garantie totale fabricant de 6 ans.
NF-A15 PWM
Spécifications ventilateur
Dimensions
140x150x25 mm
Espacement des orifices de fixation
105x105 mm
Branchement
4-Pin PWM
Type roulements
Géométrie des pales
Série A avec canalisateurs de flux
Vitesse de rotation (+/-10%)
1200 RPM
Vitesse de rotation avec L.N.A. (+/-10%)
900 RPM
Vitesse de rotation min. (PWM, +/-20%)
300 RPM
Niveau sonore
19,2 dB(A)
Niveau sonore avec L.N.A.
13,8 dB(A)
Pression statique
1,51 mm H₂O
Pression statique avec L.N.A.
0,89 mm H₂O
Puissance consommée max.
0,96 W
Ampérage max.
0,08 A
Tension
12 V
MTBF
> 150.000 h
Volume de livraison
  • Adaptateur Faible Bruit (L.N.A.)
  • Câble en Y (4-pin)
  • Extension 30cm
  • 4 Vibration-Compensators
  • 4 vis de fixation
Garantie
6 ans
NF-A15 PWM
18.01.2016 // TechArena.in
test.gif

NF-A15 PWM test

Noctua NF-A15 PWM is a full fan that requires quite nice amount of space. Many mid tower and full tower CPU case have slots on the top side, on the front and on the back. Some case also have slots on the side panels. The fan sites pretty well on the top I think that would be a good place or else the front bottom is also good enough. It is easy to setup, and thanks to the extension cable that can let you to manage the cable. I had connected the fan on the below setup. I am already having a liquid cooler on my system. That adds more to the advantage. Noctua NF-A15 PWM is capable of giving good amount of airflow inside the case that is necessary for servers and gaming pc.
Verdict du test: "Noctua NF-A15 PWM costs around Rs.3000 approx on Amazon. This amount would be high for a single fan, but if you are ready to spend on a high performance fan, then this one is worth to go for." (Rakesh Khetan, TechArena.in)
09.02.2015 // QWERTYmag.it
test.gif

NF-A15 PWM test

In questa recensione ci siamo realmente resi conto di quanto Noctua sia attenta ai dettagli e alla cura dei propri prodotti anche in delle “semplici” ventole che poi, in questo caso specifico, semplici non sono visto l’elevata cura nella produzione e nelle tecnologie adottate. Ci ha stupito moltissimo il fatto di ritrovare tutte le tecnologie citate nell’introduzione anche nelle ventole di dimensione ridotta come le NF-A4. Siamo decisamente soddisfatti sia dalle prestazioni in termini di efficienza/rumore, sia dal bundle che dai prezzi decisamente in linea con quelli di altri produttori ma assolutamente superiori in termini di caratteristiche e prestazioni. Attribuiamo a tutta la NF-A Series il premio Gold Award per l’innovazione tecnologica e la cura dei particolari che L’azienda ha dimostrato in questa serie di ventole super-efficienti.
Verdict du test: "Ventole per ogni tipo di esigenza. Noctua con la serie NF-A ha pensato proprio a tutti e a tutto proponendo prodotti di altissima qualità e tecnologia mantenendo un ottimo rapporto qualità/prezzo. Decisamente apprezzata la cura dei dettagli e del bundle che rendoni queste ventole il TOP DI GAMMA sul mercato." (Davide Torno, QWERTYmag.it)
17.11.2014 // HWready.it
test.gif

NF-A15 PWM test

Sleeving dei cavi e dotazione bundle sempre fantastico, l’azienda Austriaca non si smentisce mai da questo punto di vista. Facile il montaggio con i gommini rapidi in dotazione e l’utilizzo con le prolunghe e gli adattatori presenti, inoltre tutte le ventole sono munite dei gommini anti-vibrazione a gli angoli. Le ventole da 140mm e 150mm sono più efficienti e silenziose delle comuni e quasi sempre usate da 120mm, infatti le Noctua in esame di comportano benissimo! Perfette, silenziose ed adatte ad ogni utilizzo. Le versioni PWM riescono a combinare in modo fantastico silenziosità e potenza dissipante, fanno il loro dovere in ogni situazione di utilizzo: nei case per creare il flusso d’aria, sul dissipatore per CPU e sui radiatori dell’impianto a liquido, insomma versatili ed affidabili.
Verdict du test: "Qualità dei materiali superba (come sempre), Noctua rimane un punto di riferimento per le ventole. Abbiamo provato 4 modelli, 3 da 140mm ed 1 da 150mm, tutti fantastici" (Santoro Luigi, HWready.it)
02.09.2014 // ActualidadHardware.com
test.gif

NF-A15 PWM test

Tras probar las serie NF-A de 140mm podemos decir que estamos ante cuatro grandes ventiladores, en general silenciosos y con un buen caudal aire. De la serie NF-A14 tenemos el modelo FLX que es silencioso y mueve un buen caudal de aire. El modelo ULN es el más silencioso de los analizados, es inaudible aunque su caudal no es excesivamente alto pero suficiente para refrigerar nuestra torre. El modelo PWM es silencioso eso si, a máximas revoluciones empieza a sonar algo más, moviendo un gran caudal de aire. De la serie NF-A15 el modelo PWM es el que más caudal mueve de los cuatro modelos analizados, a máximas rpm ya suena algo pero es normal debido al gran flujo de aire que genera. Concluimos que son ventiladores muy similares, cuyas diferencias son la velocidad de rotación. El modelo ULN está especialmente diseñado como ventilador auxiliar por su baja sonoridad. El modelo NF-A14 FLX destaca por ser silencioso y tener un buen rendimiento, pudiendo regularle las rpm mediante los adaptadores que incluye. El modelo NF-A14 PWM destaca por ofrecer un gran rendimiento regulando las rpm forma automática. Y el modelo NF-A15 PWN que tiene la particularidad de que dispone agujeros de montaje de 120mm, destacando su gran caudal de aire y sonoridad.
Verdict du test: "No hace falta decir nada más, que hemos analizados unos grandes ventiladores muy versátiles, silenciosos y con un gran rendimiento, así que no podemos dejar de recomendarlos." (Jose Maria Martinez Perdigones, ActualidadHardware.com)
01.05.2014 // Conseil Config
test.gif

NF-A15 PWM test

Comme d'habitude chez Noctua les nuisances sonores sont très basses, ils sont tous inaudibles à 5v et se font entendre à 12v, à part pour le ULN qui lui reste quasiment inaudible même à fond! Les ventilateurs produisent tous un son grave (comme tous ceux de la marque) qui n'est pas gênant et les moteurs sont dépourvus de bruits parasites, un très bon point.
Verdict du test: "Nous voici arrivé au terme de ce test, que dire de ces Noctua NF-A14 ? On voit bien qu'ils sont de la même famille que les NF-S12A et continuent dans l'excellence, que ce soit au niveau des performances que dans le bundle en passant par un SAV au top et 6 ans de garantie. Vous ne pouvez pas vous tromper en optant pour un de ces ventilateurs" (Christian Marchini, Conseil Config)
08.12.2013 // infoBIT.pl
test.gif

NF-A15 PWM test

Pozostaje więc pytanie, czy mogę polecić zakup recenzowanych "śmigieł". Dla pewnej grupy odbiorców na pewno będzie to bardzo dobra opcja. Wykonanie nie pozostawia żadnych złudzeń, to produkt najwyżej klasy i nie oszczędzano tutaj na materiałach. Nie muszę chyba wspominać o świetnym wsparciu technicznym ze strony producet i 6-letniej gwarancji. Należy zatem pamiętać, że płacąc te 80 - 85 zł, nie płącimy tylko za sam produkt, ale też za całą otoczkę w postaci właśnie supportu, który nie zawodzi.
Verdict du test: "Nie jest to zatem sprzęt dla każdego, bo nie wszyscy wymagają tak wiele, jednak myślę, że zasługuje na moją rekomendację." (Wojtek Braś, infoBIT.pl)
28.11.2013 // PCElite.pl
test.gif

NF-A15 PWM test

Na pochwałę zasługuje pomysł stworzenia wentylatora o rozpiętości śmigieł jak w wentylatorze 150mm, a zrobienie mocowań o rozstawach jak w zwykłym 140mm. Wygląd wentylatora urzeka. Połączenie kolorów jest trafione. Nie brakuje dodatków. Duży plus za bardzo niski poziom szumów wydobywających się z wentylatora. Łożyska są nie słyszalne. Noctuna zrobiła faktycznie produkt najwyższej klasy.
Verdict du test: "Wentylator cechuje bardzo ładny wygląd, oraz świetna jakość wykonania. Jest cichy i całkiem wydajny, oraz oferuje system montażu 150mm wentylatora na 140mm miejscach." (Arkadiusz Byś, PCElite.pl)
04.11.2013 // SvětHardware.cz
test.gif

NF-A15 PWM test

Noctua nedávno obohatila svou nabídku ventilátorů o zbrusu nové modely, z nichž si dnes pomocí nové metodiky zkoumající průtok vzduchu i jeho rozptyl vyzkoušíme 120, 140 i 150mm verze. Postavit je budeme moci proti starším verzím i vybrané konkurenci.
Verdict du test: "Provedení všech nových ventilátorů Noctua je na velmi vysoké úrovni, což platí i pro dodávané příslušenství a detaily jako gumové podložky v rozích, které mají tlumit vibrace." (Jan Vítek, SvětHardware.cz)
18.10.2013 // Ф-Центр
test.gif

NF-A15 PWM test

Можно сказать, что сразу же определились лидеры тестирования. Это вентиляторы Thermalright TY-147 и троица Noctua, из которых мы бы хотели отдельно отметить младшую модель NF-A14 ULN. Данный вентилятор, если можно так выразиться, «катастрофически» тихий, и даже несмотря на тот факт, что кривая уровня шума Thermalright TY-147 начинается даже ниже кривой Noctua NF-A14 ULN, по субъективной оценке именно Noctua ULN является наиболее комфортным вентилятором тестирования. У него не слышно ни работы двигателя или трения подшипника, ни движения воздушного потока. Мы в самом полном смысле слова оказались восхищены бесшумностью работы данного вентилятора! Браво Noctua!
Verdict du test: "Лучшими в сегодняшнем тесте стали три модели Noctua: NF-A14 ULN, NF-A14 FLX и NF-A15 PWM, а также Thermalright TY-147. Австрийские вентиляторы могут оттолкнуть потенциальных покупателей лишь сравнительно высокой стоимостью, поскольку во всём остальном они попросту безупречны. Особенно впечатлила нас модель NF-A14 ULN, как практически бесшумная и феноменально экономичная в плане потребления электроэнергии." (Лепилов С.Б., Ф-Центр)
16.10.2013 // FunkyKit.com
test.gif

NF-A15 PWM test

Besides the old-style look of it, you can quite clearly see three ridges on each of the seven fins. The reason for this is simple: efficiency. The design of each fin makes them all more aerodynamic and able to push air through as possible.
Verdict du test: "In conclusion, the extra fan does a reasonable job setting up a push-pull system and giving us better temperatures at higher speeds without raising the ambient noise level. Not once did the thermal sensor ever break 70°C or become a strain on my ears, and that's pretty darn good. The NF-A15 sells for about 25.00 USD, and again I think that's pretty fair considering the fan is big yet silent and gives you the option of using it on your CPU or in your case." (Nick Gifford, FunkyKit.com)

Instructions de montage (PDF)

Feuille d'informations (PDF)

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.

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.

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

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.

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).

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 independent from the second fan’s rpm signal.

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.

Avez-vous une question sur un de nos produits ? Veuillez utiliser ce formulaire pour poser une question !