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Dotado del marco AAO de Noctua y de medidas avanzadas de diseño aerodinámico, como canales de aceleración de flujo (Flow Acceleration Channels), el NF-A9x14 es un ventilador silencioso, de primera calidad y altamente optimizado, con un tamaño de 92 x 14 mm. Debido a su grosor de solo 14 mm, el NF-A9x14 es el compañero perfecto para disipadores de CPU de perfil bajo y otras aplicaciones que requieren ventiladores más delgados. El diseño personalizado del PWM IC de Noctua para obtener un control de la velocidad completamente automático, así como los rodamientos SSO2, referencia en su clase, garantizan una fluidez de funcionamiento espectacular y excelente estabilidad a largo plazo. Dotado de cables modulares, adaptador para reducción del ruido y 6 años de garantía del fabricante, el NF-A9x14 es una elección de primera línea para las demandas más elevadas.
Detalles
Diseño de perfil bajo de 14 mm

Diseño de perfil bajo de 14 mm

Con un grosor de solo 14 mm, el NF-A9x14 es mucho más delgado que los ventiladores estándar de 92 x 25 mm. Esto lo hace ideal para todas las aplicaciones donde los ventiladores estándar ocuparían demasiado espacio, como los disipadores de CPU de bajo perfil en sistemas HTPC o entornos de servidor.
Canales de aceleración del flujo

Canales de aceleración del flujo

El impulsor del NF-A9x14 cuenta con canales de aceleración del flujo en el lado de succión. Al acelerar el flujo de aire en la parte exterior de las aspas más importante, se reduce la separación del flujo en el lado de succión y, por tanto, se consigue una mejor eficiencia y menor ruido de vórtice.
Marco AAO

Marco AAO

Los marcos AAO (optimización acústica avanzada) de Noctua cuentan con almohadillas antivibración integradas, así como con el diseño de entrada paso a paso y las microestructuras de superficie internas (ambos propiedad de Noctua), que perfeccionan aún más la eficiencia sonora y el rendimiento del ventilador.
Diseño de entrada paso a paso

Diseño de entrada paso a paso

El diseño de entrada paso a paso de Noctua añade turbulencia a la entrada de aire para facilitar la transición de flujo laminar a flujo turbulento, lo que reduce el ruido de entrada tonal, mejora la adjunción de flujo e incrementa la capacidad de succión, especialmente en entornos con espacio restringido.
Microestructuras de superficie interna

Microestructuras de superficie interna

Con los extremos de las aspas del ventilador en colisión con la capa límite creada por las Inner Surface Microstructures (microestructuras de superficie interna), la separación del flujo desde el lado de succión de las aspas mengua de forma significativa, lo que resulta en un ruido de paso entre las aspas menor, mejor flujo de aire y mayor eficiencia de presión.
Almohadillas antivibración integradas

Almohadillas antivibración integradas

Las almohadillas antivibración integradas, fabricadas en silicona extrasuave, minimizan la transmisión de las vibraciones por minuto, a la vez que mantienen la compatibilidad con todos los tornillos estándar y otros sistemas de montaje.
Rodamientos SSO2

Rodamientos SSO2

El NF-A9x14 cuenta con la segunda generación, aún más optimizada, de los renombrados rodamientos SSO de Noctua, de eficacia probada. Con SSO2, el imán trasero se coloca más cerca del eje para proporcionar mejor estabilización, precisión y durabilidad.
PWM IC de diseño personalizado con SCD

PWM IC de diseño personalizado con SCD

Al proporcionar control de la velocidad PWM completamente automático, el NF-A9x14 utiliza el nuevo diseño personalizado NE-FD1 PWM IC que integra la tecnología SCD (Smooth Commutation Drive). Al proporcionar impulsos de torsión más fluidos, SCD suprime los ruidos de conmutación y, por tanto, hace al ventilador más silencioso a velocidades bajas.
Adaptador para reducción del ruido

Adaptador para reducción del ruido

El NF-A9x14 está provisto de un adaptador para reducción del ruido (LNA) que reduce la velocidad máxima del ventilador de 2200 a 1700 rpm. El LNA se puede utilizar bien para que el ventilador funcione a una velocidad fija de 1700 rpm o para limitar la velocidad máxima cuando se utiliza el control PWM automático.
Extensas opciones de cableado

Extensas opciones de cableado

El cable corto principal del ventilador, de 20 cm, minimiza la acumulación de cables en las aplicaciones típicas, mientras que el cable de extensión de 30 cm incluido proporciona un alcance mayor cuando sea necesario. Los dos cables están completamente enmallados.
6 años de garantía del fabricante

6 años de garantía del fabricante

Los ventiladores de Noctua son reconocidos por su impecable calidad y destacada longevidad. Al igual que todos los demás ventiladores Noctua, el NF-A9x14 ofrece un tiempo medio de vida entre fallos (MTBF) de más de 150 000 horas y viene con una garantía total del fabricante de 6 años.
NF-A9x14 PWM
Especificaciones ventilador
Dimensiones
92x92x14 mm
Espacio entre orificios de montaje
82,5x82,5 mm
Conexión
4-Pin PWM
Rodamiento
Geometría de las aspas
Tecnología del marco
Velocidad de rotación (+/-10%)
2200 RPM
Velocidad de rotación con L.N.A. (+/-10%)
1700 RPM
Velocidad de rotación min. (PWM, +/-20%)
500 RPM
Sonoridad
19,9 dB(A)
Sonoridad con L.N.A.
13,5 dB(A)
Presión estático
1,64 mm H₂O
Presión estático con L.N.A.
0,92 mm H₂O
Potencia max.
1,32 W
Amperaje max.
0,11 A
Voltaje
12 V
MTTF
> 150.000 h
Volumen de entrega
  • Adaptador para reducción del ruido (L.N.A.)
  • Cable de 4 pines en forma de Y
  • Cable de extensión de 30 cm
  • 4 Vibration-Compensators
  • 4 tornillos de ventilador
Garantía
6 años
NF-A9x14 PWM
A-Series fans
09.02.2015 // QWERTYmag.it
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NF-A9x14 PWM Opinión

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.
Resultado del análisis: "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)
17.01.2013 // PC Ekspert
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NF-A9x14 PWM Opinión

Cijene manjih (A4x10/A6x25/A9x14 – 12,90/14,90/16,90€), kao i većih 140mm modela (21,90€) su uglavnom u skladu s dosadašnjom politikom Noctua proizvoda, koja se i dalje bazira na principu – kvaliteta prije svega, uz odgovarajuću cijenu. Nakon svega viđenog, zaista im ne možemo puno zamjeriti na tome, s obzirom na sve prednosti njihovih proizvoda iz nove A-serije za koje imamo gotovo isključivo riječi hvale.
Resultado del análisis: "Noctua nam je ovom prilikom priredila mnoga iznenađenja po pitanju novih proizvoda raznih veličina i namjena. Od minijaturnog 40mm A4x10 modela, preko A6x25 i A9x14, pa sve do 140mm inačica, svaki od testiranih ventilatora odaje onu poznatu Noctua kvalitetu i uglađenost u radu uz visoku funkcionalnost i bogatu dodatnu opremu. Za svakoga ponešto, bi možda bio najslikovitiji opis nove A-serije ventilatora, a što se nas osobno tiče, itekako bismo voljeli vidjeti par 140mm ULN modela i u našem testnom računalu. Za korisnike koji zahtijevaju veliku efikasnost i relativno umjeren nivo buke, tu su naravno A14 FLX i A15 PWM modeli, koji svojom fleksibilnošću, elegantnim radom ali i visokom kvalitetnom izrade itekako zaslužuju našu preporuku." (Domagoj Hodak, PC Ekspert)
20.11.2012 // HWBox.gr
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NF-A9x14 PWM Opinión

Ξεκινώντας από τον "μεγάλο" της παρέας, ο NF-A9x14 ήταν ο ανεμιστήρας που ξεχώρισα από την πρώτη στιγμή. Η διάμετρός του ανέρχεται στα 92mm, αλλά το συνολικό του μέγεθος είναι αυτό που κερδίζει τα βλέμματα, καθώς οι διαστάσεις του ανήκουν στην κατηγορία ... "Super-Slim". Ναι, το ύψος του συγκεκριμένου ανεμιστήρα, μαζί με το πλαίσιό του φτάνει στα 1,4 cm! Ταυτόχρονα, υπόσχεται βέλτιστη στατική πίεση μέσω της ιδιαίτερης σχεδίασής του ανεμιστήρα και των flow drivers του. Παράλληλα, ο sleeved bearing μηχανισμός τους εγγυάται πρακτικά αθόρυβη λειτουργία στα 19,9 dB, διατηρώντας έναν χαμηλό ρυθμό περιστροφής με μέγιστο τις 2220RPM στα 12v, και όλα αυτά με υπολογισμένη διάρκεια ζωής (MTBF- Mean Time Between Failure) που αγγίζει τις 150000 ώρες - περίπου... 17 χρόνια 24/7 λειτουργίας θα χρειαστείτε μέχρι να χρειαστεί να τον αντικαταστήσετε. Ο συγκεκριμένος ανεμιστήρας έρχεται να σπάσει πολλά από τα "ταμπού" και τους μύθους που κυκλοφορούν γύρω από την αγορά ανεμιστήρων και συστημάτων ψύξης- ένας από τους οποίους είναι ότι μόνο ανεμιστήρες > 14cm εγγυώνται αθόρυβη λειτουργία και χαμηλό ρυθμό περιστροφής, για να μπορέσουν να "σπρώξουν" αρκετά λογική ποσότητα αέρα εντός του συστήματος.
Resultado del análisis: "Αν υπήρχε κάποιος από τους τρεις ανεμιστήρες που ξεχώρισα, αυτός είναι ο Noctua NF-A9x14 PWM, ο 92mm ανεμιστήρας που είχαμε στην διάθεσή μας. Δεν είναι μόνο το γεγονός μόνο ότι μπορεί να κάνει τα καταφέρνει εξαιρετικά σε θέματα απόδοσης και θορύβου, αλλά συνδυάζει και ένα super-slim profile το οποίο θα βοηθήσει την κατάσταση αρκετά ειδικά αν το σύστημά σας είναι αρκετά... "στριμωγμένο"! Η χρήση για μένα, μετά το πέρας των δοκιμών, ήταν να τον ενσωματώσω σε ένα Bitfenix Prodigy White σύστημα, στο οποίο η προσωπική μου ανοχή στον θόρυβο που παράγει είναι μηδενική! NF-A9x14 PWM με ικανοποίησε απόλυτα στο θέμα του θορύβου, σε σημείο που στα 7V δεν μπορεί κάποιος να ακούσει αν λειτουργεί ή όχι!" (Vasilis Galiouras, HWBox.gr)
14.11.2012 // El Chapuzas Informático
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NF-A9x14 PWM Opinión

Hemos probado los tres ventiladores y gratamente nos ha sorprendido su bajo nivel de ruido generado. El modelo de A4x10 es el único mínimamente más audible, pero por sus altas revoluciones es normal. Los modelos de 40 y 60 mm son perfectos para sistemas embebidos que requieren un ventilador para la extracción de aire, así como para los amantes del modding que deseen refrigerar zonas de su PC de menor superficie. El modelo de 90 mm es ideal para equipos HTPC con disipadores de perfil bajo, que lo verán aún más reducido al cambiar los habituales ventiladores de 25 mm de grosor por este de 14 mm.
Resultado del análisis: "Los ventiladores Noctua Serie-A ofrecen en formato compacto el rendimiento esperado por un ventilador de esta prestigiosa marca: gran flujo de aire a un mínimo nivel sonoro. Su uso está limitado a necesidades concretas, por lo que gran parte de los usuarios no tendrán necesidad de ellos. Sin embargo, los que requieran productos de estas dimensiones agradecerán en gran medida el lanzamiento de estos ventiladores tan eficientes por parte de Noctua." (Iván Martínez, El Chapuzas Informático)
09.11.2012 // Testfreaks.com
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NF-A9x14 PWM Opinión

Noctua has always made great products, and from this I see they still do. The new NF-A9x14 92mm fan is one that can be used for many things, replace a bad fan in your server, or use it to cool the CPU in your HTPC. The thin form factor of this fan allows it to be versatile as to where you might want to install it.
Resultado del análisis: "Plain and simple, if you need a good fan, you can’t go wrong with a Noctua." (Kristofer Brozio, Testfreaks.com)
28.10.2012 // PCkoloji.com
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NF-A9x14 PWM Opinión

SSO2 rulmanlı fanın kanatlarının ucundaki özel FAC kanalları görülmekte. Normalde maksimum hız 2200 devir ama LNA adaptörle 1700 devirle sınırlamak mümkün. En düşük başlama hızı 300 devir. 2200 devirde gürültü 19.9 dBA ve akım 50.5 m³/h iken 1700 devirde gürültü 13.5 dBA ve hava akımı 38.1 m³/h
Resultado del análisis: "Uç kısımlarda darbe emici özel kauçuk kaplamalar dikkat çekiyor. PWM destekli ama 3-pin fan çıkışı ile de kullanılabilir. 12V fanın en yüksek güç tüketimi 1.32 Watt. 150 bin saat kullanım ömrü biçiliyor ve denemelerimize göre gerçekten inanılmaz derecede sessiz. 1 metre mesafeden sonra duymak imkansız." (Görkem Yildirimy, PCkoloji.com)
22.10.2012 // HD Technology
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NF-A9x14 PWM Opinión

Le ventole Noctua della nuova serie A, sono state veramente all’altezza delle nostre aspettative, qualità impeccabile ed una longevità eccezionale. Gli appassionati potranno utilizzare queste ventole per una durata di oltre 150.000 con una garanzia sul prodotto di ben 6 anni. Come tutte le fan delle varie serie, sono curate minimamente sotto ogni punto di vista.
Resultado del análisis: "Con questa recensione, non possiamo far a meno di consigliarvi queste ventole per chi utilizza un HTPC." (Victor Italiano, HD Technology)
11.10.2012 // Hardware - HDblog
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NF-A9x14 PWM Opinión

Dall’immagine si evince che, anche se siamo davanti a delle ventole molto piccole, la potenzialità che presentano è notevole anche rispetto alla sorella più grande da 92 mm, facendo registrare la stessa temperatura dell’hard disk utilizzando il modello A6x25 e, la ventola più piccola soltanto un grado di differenza rispetto alle sorelle più grandi. Segnaliamo infine la poca rumorosità di tutti e tre i modelli, confermando di fatto le specifiche proposte dall’azienda.
Resultado del análisis: "Come da copione, anche con queste nuove ventole Noctua non ci ha delusi, proponendo prodotti che anche se di piccole dimensioni svolgono bene il proprio lavoro sia per prestazioni che la qualità; tutti e tre i modelli sono ideali per chi cerca prestazioni ottimali per il proprio sistema senza tralasciare la rumorosità." (Michele Bruno, Hardware - HDblog)
20.03.2017 // ITNdaily.ru
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NF-A9x14 PWM Opinión

Вентиляторы форм-фактора 92 мм не столь популярны, как 120 мм варианты, однако и те и другие чаще всего используются в компьютерных корпусах и для охлаждения радиаторов процессорных СО. В ассортименте Noctua подобных моделей всего несколько штук, мы решили оценить технические возможности трех представителей из различных линеек.
Resultado del análisis: "В ассортименте Noctua представлено достаточное количество разнообразных вариантов. И самой универсальной стоит признать серию redux, а также модели с суффиксом FLX. Баланс тишины и производительности в них отточен с максимальной точностью." (Евгений Никифоров, ITNdaily.ru)
03.11.2014 // Conseil Config
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NF-A9x14 PWM Opinión

Malgré la taille qui présageait des nuisances sonores horribles comme nous avons tous l'habitude d'entendre venant de ventilateurs comme ceux-ci, et bien il n'en est rien! Le ventilateur qui me faisait le plus peur était le tout petit Ax410, un ventilateur de 4cm qui, tournant à 4500 RPM, me donnait mal aux oreilles avant même de le brancher, mais au final il se révèle être extrêmement silencieux, du très bon pour Noctua qui pourra enfin vous réconcilier avec vos appareils utilisant des ventilateurs de cette taille. Le A6x25 est le plus silencieux du lot, il n'y a aucun bruit parasite audible et il saura se faire discret même au maximum. Le A9x14, qui n'est autre qu'un ventilateur 92 mm au format "low profile" est un modèle qui est très intéressant si vous êtes en manque de place dans vote HTPC (ou tout autre boitier avec peu de place), il a une grande plage d'utilisation et saura se faire très discret, à noter qu'il émet un léger son aigu à plein régime.
Resultado del análisis: "Que dire de cette série un peu spéciale de chez Noctua? Au départ un peu sceptique quant au bruit que génèrent généralement ces types de ventilateurs il faut avoué que j'ai été agréablement surpris. [...] si vous cherchez à remplacer un ventilateur criard (par exemple dans un switch, ou un NAS etc..) par un silencieux vous avez trouvé ce qu'il vous faut!" (Christian Marchini, Conseil Config)

Manual de instalación (PDF)

Hoja de datos (PDF)

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.

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).

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 big is the NH-D15S and how much clearance does it provide for RAM and mainboard heatsinks? Copy

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

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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