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Específicamente diseñado para aplicaciones de refrigeración de caja de baja impedancia, el clásico NF-S12B es el favorito entre los usuarios más entusiastas de todo el mundo y ayuda a que Noctua se establezca como uno de los mejores proveedores de equipamientos de refrigeración silenciosa de calidad. La nueva edición redux actualiza un modelo galardonado de Noctua al presentarlo en un paquete a un precio accesible que se ha reducido a lo esencial: el ventilador NF-S12B. Sus rodamientos SSO, sus más de 150.000 horas de tiempo medio de vida entre fallos y sus 6 años de garantía del fabricante hacen del NF-S12B redux la elección perfecta al combinar la calidad que ofrece Noctua con un precio atractivo. La versión PWM de 1200 rpm cuenta con el NE-FD1 PWM IC para un control de la velocidad automático, que permite lograr el equilibrio perfecto entre un alto rendimiento de refrigeración y un funcionamiento silencio en cada situación.
Detalles
Diseño probado del NF-S12B

Diseño probado del NF-S12B

Decenas de miles de entusiastas de la refrigeración silenciosa tienen fe ciega en el clásico NF-S12B de Noctua. Gracias a su impresionante silencio, su excelente rendimiento y su calidad impecable, el NF-S12B se ha convertido en una referencia establecida para los ventiladores de 120 mm.
Simplificada edición redux

Simplificada edición redux

La línea de productos redux actualiza algunos de los modelos más populares y galardonados de Noctua al presentarlos en paquetes a precios accesibles. Todos los productos de la edición redux son modelos con una eficacia probada a lo largo del tiempo, lo que hace que Noctua se establezca como uno de los mejores proveedores de equipamientos de refrigeración silenciosa de calidad.
Diseñado para una eficiente ventilación de caja

Diseñado para una eficiente ventilación de caja

Las típicas aplicaciones de ventilación de caja en PC requieren un elevado flujo de aire, pero solo una presión estática media. El NF-S12B ha sido específicamente diseñado para obtener una elevada eficiencia de flujo de aire y poco ruido, obteniendo los mejores resultados en las llamadas aplicaciones de baja impedancia.
Bevelled Blade Tips (Extremos biselados de las aspas)

Bevelled Blade Tips (Extremos biselados de las aspas)

Al reducir la interacción crítica entre el rotor y el estator, los extremos biselados de las aspas permiten combinar unos bordes más salientes y una mayor superficie del aspa con un funcionamiento más silencioso, por lo que se establecen como piedra angular de la gran eficiencia de los ventiladores.
PWM IC de diseño propio con SCD

PWM IC de diseño propio con SCD

Al proporcionar un control de la velocidad completamente automático a través del PWM, el ventilador utiliza el NE-FD1 PWM IC, diseñado especialmente por Noctua, que integra la tecnología Unidad de Conmutación Suave (SCD). Al proporcionar impulsos de torsión más fluidos, la SCD suprime los ruidos de conmutación PWM y, por tanto, hace que el ventilador sea más silencioso a velocidades más bajas.
Rodamientos SSO

Rodamientos SSO

La combinación del eficaz concepto de rodamientos hidrodinámicos con un imán adicional que apoya la autoestabilización del eje del rotor convierte a la tecnología de rodamientos SSO de Noctua, de probada eficacia, en sinónimo de funcionamiento sumamente silencioso y excepcional estabilidad a largo plazo.
Accesorios opcionales

Accesorios opcionales

Los usuarios pueden elegir entre la amplia gama de accesorios opcionales de Noctua, como los soportes anti-vibración, los adaptadores para la reducción de ruido, los cables con forma de Y, los adaptadores de 3:4 pines o los cables de extensión, para actualizar los ventiladores de la edición redux de acuerdo con sus necesidades individuales.
6 años de garantía del fabricante

6 años de garantía del fabricante

Los ventiladores de Noctua son conocidos por su impecable calidad y su larga vida útil. Como todos los ventiladores de Noctua, los modelos de la edición redux disponen de un tiempo medio de vida entre fallos de más de 150.000 horas y de una garantía total del fabricante de 6 años.
NF-S12B redux-1200 PWM
Especificaciones ventilador
Dimensiones
120x120x25 mm
Espacio entre orificios de montaje
105x105 mm
Conexión
4-Pin PWM
Rodamiento
Velocidad de rotación (+/-10%)
1200 RPM
Velocidad de rotación min. (PWM, +/-20%)
400 RPM
Sonoridad
18,1 dB(A)
Presión estático
1,31 mm H₂O
Potencia max.
0,9 W
Amperaje max.
0,075 A
Voltaje
12 V
MTTF
> 150.000 h
Volumen de entrega
  • Ventilador
  • 4 tornillos de ventilador
Garantía
6 años
NF-S12B redux-1200 PWM
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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15.04.2017 // Building a Gaming PC
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NF-S12B redux-1200 PWM Opinión

Each of the fans comes with mounting screws and is extremely simple to install. I installed each Redux fan in my test system then put them through their paces running the Witcher 3 at maximum settings on a GTX 1080Ti at 4K. The fans each remained whisper quiet even under full load, which is great news for hardcore gamers. But if you’re more of a casual gamer, and mainly use your PC for work or surfing the internet, you’ll barely notice these fans are on. This makes them a perfect choice for mini-ITX builds or a rig you’ve designed to sit under your TV in the living room.
Resultado del análisis: "If you’re building a gaming PC, first make sure you don’t overlook cooling, second make sure you consider Noctua’s excellent line up. Recommended." (Chris Sealey, Building a Gaming PC)
12.04.2017 // Glob3trotters.com
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NF-S12B redux-1200 PWM Opinión

The attention to details is present everywhere and even though Noctua had to cut corners, they didn’t go overboard and kept what you would like to see like the fully braided cables and top-notch packaging that defiantly makes you feel like you are getting a high quality product at a good price.
Resultado del análisis: "So, this Redux series is addressed to those on a budget, Noctua focusing on exactly what you need – a really good fan. So you will still get the SS0 bearing, very good performance and 6 years warranty with over 150k hours of MTBF. " (Alex Nistor, Glob3trotters.com)
03.03.2017 // TechHardware.it
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NF-S12B redux-1200 PWM Opinión

Noctua ancora una volta si è dimostrata all’altezza delle aspettative, è riuscita a commercializzare ventole dall’alto rapporto qualità/prezzo pur mantenendo costi contenuti. Eccellente come sempre la qualità costruttiva, si rivela versatile per diversi utilizzi mantenendo costi interessanti. Molto buono il packaging, sempre molto curato, sufficiente il bundle, c’è lo stretto indispensabile.
Resultado del análisis: "Eccellente come sempre la qualità costruttiva, si rivela versatile per diversi utilizzi mantenendo costi contenuti. " (Tommaso Biallo, TechHardware.it)
03.03.2017 // PcGaming.games
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NF-S12B redux-1200 PWM Opinión

Una vez montados y en funcionamiento los ventiladores en el PC, lo primero que nos percatamos es el poco ruido que genera. En general, todos los modelos de la serie Redux son muy silenciosos e incluso estando al 100% son difíciles escuchar. Los más silenciosos de toda la gama son los ventiladores pequeños, qué puede ser a causa de tener las aspas más pequeñas.
Resultado del análisis: "En esta valoración, hemos tenido en cuenta tanto las características técnicas, rendimiento y precio para valorar este producto. Los ventiladores tienen un precio muy bajo, pero sus características técnicas y el rendimiento son espectaculares." (Carlos Carraveo, PcGaming.games)
30.01.2017 // PC nadšenci
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NF-S12B redux-1200 PWM Opinión

Spoločnosť Noctua je v oblasti chladenia počítačov silné meno. Rakúska spoločnosť sa preslávila výbornými chladičmi procesorov a kvalitnými ventilátormi. Za kvalitu sa však platí, preto bývajú produkty Noctua často mimo záujmu bežného zákazníka, hráča. To sa však výrobca snaží zmeniť produktovou líniou Redux.
Resultado del análisis: "Ventilátory Noctua z radu Redux si od nás odnášajú strieborné ocenenie za kvalitné spracovanie, 6 ročnú záruku, prijateľnú cenu a vysoký výkon." (Tomáš Brestovanský, PC nadšenci)
28.12.2016 // OCClub.ru
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NF-S12B redux-1200 PWM Opinión

«Примочки», под которыми конечно подразумеваются цветные силиконовые гвозди и угловые подкладки, - они мне понравились. Называются, напомню, Anti-Vibration Pads (NA-SAVP1) и Anti-Vibration Mounts (NA-SAVP2). Недорогие, в упаковке их много, и реально снижают шум. Поменять всю систему охлаждения в корпусе – это влетит в «копеечку», а силиконовые гвозди могут немного все сделать тише, да и на будущее останутся. Гарантия 6 лет=) Серия IndustrialPPC – решения скорее специализированные, но 12 В модели к покупке можно смело рекомендовать. И я не знаю насколько на заводе будет полезна защита по стандарту IP67, но за возможность помыть вентилятор под краном просто спасибо Noctua. Redux – универсальность и доступность. Noctua, как известно, делать хорошие вещи, но дорогие. Благодаря изменению комплекта, а как следствие и конечной цены, но сохранению подхода к самому изделию, вентиляторы серии Redux в некоторой степени стали «ближе к народу».
Resultado del análisis: "В этот раз не будет привычных плюсы/минусы. И силиконовые крепления Chromax, и вентиляторы серий IndustrialPPC и Redux – все это к покупке можно рекомендовать. К тому-же, на абсолютно всю продукцию компании 6 лет гарантии, что как-бы намекает на качество." (Oleg Ubeiko, OCClub.ru)
15.11.2016 // HwOverdrive.com
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NF-S12B redux-1200 PWM Opinión

Nonostante il bundle scarno, abbiamo potuto apprezzare lo stesso le prestazioni tipiche dei prodotti Noctua. Siamo rimasti piacevolmente sorpresi dalla linearità dello scaling operando in tensione.
Resultado del análisis: "Possiamo affermare che per chi è in cerca di un prodotto dalle alte prestazioni, ma non vuole spendere troppo, le ventole della linea Redux sono l’ideale." (Attila Tortorella, HwOverdrive.com)
16.10.2016 // PC-Gaming.it
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NF-S12B redux-1200 PWM Opinión

Man mano che leggevamo i dati tecnici abbiamo capito fin da subito che la serie Redux si sarebbe distinta, ben consci anche degli ottimi prodotti della casa, non a caso il sistema di test era appunto un glorioso NH D-14, cuore degli amanti dell’overclock, superato solo dal migliorato NH-D15. Le impressioni su test si sono rivelate ottime, e si sono dimostrate ben sopra gli usi comuni.
Resultado del análisis: "Chi desidera soluzioni più piccole, ha una vasta gamma da scegliere, e le Redux si sono dimostrate particolarmente efficienti." (Matteo Carrara, PC-Gaming.it)
20.09.2016 // Top10Games.es
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NF-S12B redux-1200 PWM Opinión

Como este verano ha hecho mucha calor, Noctua ha lanzado una solución para nuestros hornos equipos, la nueva gama de ventiladores Redux. En esta nueva gama encontramos ventiladores desde los 80mm hasta los 140mm. Ya disponible las nuevas versiones de los famosos ventiladores de Noctua, llamada Redux que pueden utilizarse en la refrigeración de cajas y radiadores. La serie Redux es la favorita entre los usuarios más entusiastas de todo el mundo y ayuda a que Noctua se establezca como uno de los mejores proveedores de equipamientos de refrigeración silenciosa de calidad.
Resultado del análisis: "Noctua ha trabajado muy bien y ha realizado correctamente su trabajo con esta nueva gama Redux, ventiladores profesionales con unos materiales de gran calidad y rendimiento excepcional, pero con un coste asequible apto para todos los bolsillos." (Adrián José Pérez Toré, Top10Games.es)
15.09.2016 // techanthology.com
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NF-S12B redux-1200 PWM Opinión

Facciamo una piccola premessa, le ventole in questione hanno uno street price di circa il 30% inferiore rispetto alla variante “standard”. La domanda nasce spontanea, valgono il 30% meno? Analizzando nel dettaglio il prodotto ed avendolo testato con cura in ogni minimo aspetto nelle differenti versioni e dimensioni possiamo avere la presunzione di dire che sappiamo bene di cosa stiamo parlando; ad una prima analisi la cosa che colpisce e che, a giudizio della nostra redazione, piace, è il colore delle ventole, non fraintendeteci, il marrone è caratteristico ma troviamo ben più equilibrata la nuova combinazione di colori che meglio si adatta ad essere integrata nelle build dei nostri utenti. Non abbiamo sofferto la pressocchè totale assenza di bundle, anzi, se è vero che fa piacere ricevere la lettera di congratulazioni dal CEO Noctua, è anche vero che risparmiare a qualcuno potrebbe piacere di più, il vero grande assente per chi dovesse acquistare il prodotto è il kit di viti anti-vibrazione in gomma che però è possibile acquistare separatamente ad un prezzo modesto. Quindi? Quindi si, compratele, il prodotto è davvero ben fatto, le prestazioni sono al top per la categoria, la qualità Noctua c’ è e si tocca con mano, la garanzia di 6 anni parla da sola;
Resultado del análisis: "Signori e signore, se volete il massimo ma volete spendere il minimo, il giusto compromesso è dato dalla serie Noctua Redux, ed è per questo che abbiamo deciso di premiare il produttore con il nostro Techanthology – Editors Choice!" (Federica Leonardi, techanthology.com)

Hoja de datos (PDF)

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

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

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

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

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

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

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

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

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

What pin configuration do Noctua 12V fans use?

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

pin configuration

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

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

P14

How should I clean my Noctua fan?

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

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.

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.

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).

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.

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