heading

El NF-A8 es un ventilador silencioso de 80 mm altamente optimizado y de gran calidad. Ya que dispone del marco AAO (Optimización Acústica Avanzada) de Noctua y de las características propias de un diseño aerodinámico sofisticado, como los Flow Acceleration Channels (Canales de Circulación Acelerada), el NF-A8 mejora el reconocido rendimiento de refrigeración silenciosa del NF-R8, que tan premiado ha sido. La versión PWM usa el NE-FD1 IC especialmente diseñado por Noctua para un control de la velocidad totalmente automático mediante conectores del ventilador de 4 pines y está provisto de un Adaptador de Reducción de Ruido que reduce la velocidad máxima de 2200 a 1750 rpm durante el control PWM. Su funcionamiento suave y silencioso, sus reconocidos rodamiento SSO2 y la alta calidad de Noctua lo convierten en la mejor opción para las más elevadas exigencias.

Detalles
Superando al premiado NF-R8

Superando al premiado NF-R8

El ventilador NF-R8 de Noctua se ha convertido en la opción por excelencia entre los entusiastas de los PC que buscan ventiladores silenciosos de 80 mm de gran calidad. Gracias a su profunda optimización aerodinámica, el NF-A8 proporciona una presión estática más alta y un mejor índice de flujo de aire/ruido que el de su aclamado predecesor.
Flow Acceleration Channels (canales de circulación acelerada)

Flow Acceleration Channels (canales de circulación acelerada)

El rotor del NF-A8 dispone de Flow Acceleration Channels (Canales de Circulación Acelerada) por el lado de succión. Aumentando la velocidad del flujo de aire en las regiones cruciales exteriores de las aspas, esta medida reduce la separación del flujo en el lado de succión y resultando así en una mayor 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 sistemas de montaje estándar y clips para ventilador utilizados en los disipadores.
Rodamientos SSO2

Rodamientos SSO2

El NF-A8 dispone de los reconocidos rodamientos optimizados SSO de segunda generación de Noctua. Con los SSO2, el imán posterior está situado más cerca del eje para proporcionar mayor estabilidad, precisión y durabilidad.
PWM IC de diseño propio con SCD (Unidad de Conmutación Suave)

PWM IC de diseño propio con SCD (Unidad de Conmutación Suave)

Con soporte total para un control de velocidad PWM automático, el NF-A8 PWM usa el nuevo NE-FD1 PWM IC de diseño propio de Noctua que se integra con la tecnología Smooth Commutation Drive (SCD, Unidad de Conmutación Suave). Proporcionando impulsos de par más suaves, el SCD disminuye los ruidos de cambios del PWM y hace que el ventilador funcione de forma más silenciosa a velocidades bajas.
Low-Noise Adaptor (Adaptador de Reducción de Ruido)

Low-Noise Adaptor (Adaptador de Reducción de Ruido)

El NF-A8 PWM viene con un Low-Noise Adaptor L.N.A. (adaptador de reducción del ruido) que reduce la velocidad máxima del ventilador de 2200 a 1750 rpm. El L.N.A. se puede usar tanto para usar el ventilador a una velocidad fija de 1750 rpm como para fijar una velocidad máxima al usar el control de PWM automático.
Opciones de Cableado Extensible

Opciones de Cableado Extensible

El corto cable principal de 20cm del ventilador minimiza el lío de cables en situaciones típicas mientras que el cable de extensión de 30cm que se suministra permite un alcance extra cuando resulta necesario. Ambos cables están totalmente forrados.
6 años de garantía de fabricante

6 años de garantía de fabricante

Los ventiladores de Noctua son conocidos por su impecable calidad y su larga vida útil. Como todos los ventiladores de Noctua, el NF-A8 dispone de una MTBF de más de 150.000 horas con una completa garantía de fabricante de 6 años.
NF-A8 PWM
Especificaciones ventilador
Dimensiones
80x80x25 mm
Espacio entre orificios de montaje
71,5x71,5 mm
Conexión
4 pines
Rodamiento
Geometría de las aspas
Tecnología del marco
Velocidad de rotación (+/-10%)
2200 RPM
Velocidad de rotación con L.N.A. (+/-10%)
1750 RPM
Velocidad de rotación min. (PWM, +/-20%)
450 RPM
Sonoridad
17,7 dB(A)
Sonoridad con L.N.A.
13,8 dB(A)
Presión estático
2,37 mm H₂O
Presión estático con L.N.A.
1,54 mm H₂O
Potencia max.
0,96 W
Amperaje max.
0,08 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-A8 PWM
A-Series fans
Video Reviews
The following video reviews have not been created by Noctua. Responsibility for the information and views expressed in the videos lies entirely with the authors.
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10.05.2014 // Vortez.net
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NF-A8 PWM Opinión

+ They are quiet fans.
+ They have pretty good output for being so quiet.
+ They come in resilient packaging.
+ They come with well-chosen accessories.
Resultado del análisis: "Noctua started with really good fans, and made them better. One thing that strikes you if you handle the old fans is that they are very good fans, so it makes sense that Noctua still sells them in their redux line. But these A-Series fans are even better, and well can they join their big brothers in the A-Series lineup." (Ed Hume, Vortez.net)
03.03.2015 // PureOverclock.com
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NF-A8 PWM Opinión

As always, sound levels are superb with these fans. While my opinions are subjective, what I found was after 45 dBs, that’s when I felt a fan was getting too noisy. Nothing about the Noctuas sounded too loud while testing them even at max speed, but with the plethora of LNAs and ULNAs to add to the fans, even if you didn’t have a way to control the fans it was unlikely you couldn’t tone them down to where you would be happy with them.
Resultado del análisis: "Overall, I believe Noctua makes an excellent product. There really isn’t anything I can complain about except for the price, and even then the price is understandable. If you need good air flow, low noise and have a small form factor case that needs some better fans, I could definitely recommend what Noctua has to offer here." (Josh Jackson, PureOverclock.com)
09.02.2015 // QWERTYmag.it
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NF-A8 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)
07.01.2015 // Neoseeker.com
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NF-A8 PWM Opinión

After studying the Noctua A-series Premium fans for the last few weeks, I have begun to understand how each design feature performs their function. As noted in the following paragraphs, each feature adds to the overall function of noise reduction, therefore improving air flow and performance efficiency. The Noctua Advanced Acoustic Optimization Frame has anti-vibration pads in each mounting flange corner. This feature not only reduces vibration noise transferring from the fan, but also into the fan from wobbly case components. The Stepped Inlet Design on the fan case edge turns the air flow from laminar to turbulent, reducing the tonal intake noise. The Inner Surface Microstructures next cause a boundary layer to reduce suction side flow separation as the fan blade tips pass, reducing the blade passing noise with improved air flow. The Flow Acceleration Channels on the fan blades cause the outer blade region air flow to speed up, reducing vortex noise of the fan blades while improving efficiency. Moving the magnet of the Noctua renowned SSO Bearing closer to the axis of the bearing improves stabilization, precision and durability. All of these features and more are packaged with many accessories for each fan, plus Noctua provides a 6 year warranty.
Resultado del análisis: "Noctua A-series Premium fans are looking like the right choice for your new or replacement case fan." (Marvin Purdy, Neoseeker.com)
14.11.2014 // Modders-Inc.com
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NF-A8 PWM Opinión

Aside from the lower temperature, the A9 fans have a more “spread out” sound signature even though it is running at a higher RPM and has lesser high pitched noises across various speeds. The extra padded corners also help in giving extra space when positioned in a “pull” position minimizing noise. The smaller form factors and compact builds are much more common now than ever before with many users opting to build desktops that can be portable for LAN parties or for discreet integration in their living room as an HTPC. The A9 and A8 series fans fit these application well with excellent performance and low noise profiles that is even more flexible if need be. For storage or, spot cooling or component cooling in even tighter spaces, the A4 series offers a rare and impressive feature set that is above what most people would expect from something this small.
Resultado del análisis: "These A-series fans also enjoy the same set of low noise features and premium build quality that the other Noctua fan series provides, including the impressive 6-year warranty and extensive accessory package." (Ron Perillo, Modders-Inc.com)
22.10.2014 // El Chapuzas Informático
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NF-A8 PWM Opinión

Como podemos comprobar, los modelos de 80 y 92 mm son completamente silenciosos, pero el modelo de 40 mm es algo ruidoso como cabe esperar para sus 4500 RPM máximas. Es curioso además ver el gran flujo de aire que ofrece el modelo A4, pues es capaz de moverse solo con gran facilidad.
Resultado del análisis: "Los ventiladores Noctua NF-A4/A8/A9 demuestran una vez más el buen hacer de Noctua, pues ofrecen un gran rendimiento con una sonoridad mínima. Además, llegan acompañados de un excelente kit de accesorios, algo de lo que pocas marcas pueden presumir." (Iván Martínez, El Chapuzas Informático)
11.05.2014 // Hardware-360
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NF-A8 PWM Opinión

Stock performance shows a 3 degree drop with the A9 fans on heatsink use and up to 2 degrees under FPU only loads. Noise performance is superior in the NF-A9, despite the higher RPM with a smoother PWM operation and lesser high pitched noises across various speeds. The extra padded corners also help in giving extra space when positioned in a pull position minimizing noise. Ultimately each fan size has its own application depending on the chassis or heatsink applied to, although the smaller A4 5V fan is more suitable for storage cooling but will not look out of place as a chipset or spot cooler as well, especially the 12V version for added flexibility. The 92mm and 80mm A9 and A8 have a very balanced performance as both heatsink fans or case fans with their wide fan blade and excellent static pressure performance. The further lowered noise compared to the B9 and R8 series is a welcome change because the original fans were not particularly troublesome at all when it came to noise either. The integrated padded corners also work very well for noise dampening, especially when positioned as a “pull” fan since there is an added space that minimizes high pitched noises typically present in high-RPM performance fans when placed in this position.
Resultado del análisis: "As with all Noctua fans, they come with premium pricing as they come in premium packaging and feature set so they are not easily affordable. The good thing is that the 6-year warranty found on larger Noctua fans also apply to the A9, A8 and A4 series, as well as the premium accessories that come out of the box." (Ron Perillo, Hardware-360)
08.08.2016 // ZeDen.net
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NF-A8 PWM Opinión

Niveau nuisances sonores, notre NF-A8 dégomme littéralement la ventilation de base de notre NAS N2810. Avec une valeur de 37,7 dBa sans LNA ou 36,5 dBa avec contre les 45 dBa de base, les chiffres parlent d'eux-mêmes ! Par contre, la valeur constante s'explique par l'absence d'une gestion PWM, ce qui implique une vitesse constante du ventilateur. Réducteur de section carré Concernant les températures, nous avons le même constat. Le Noctua fait beaucoup mieux, malgré notre montage quelque peu bancal qui génère beaucoup de fuites.
Resultado del análisis: "Comme à leur habitude, Noctua, avec le NF-A8, ne laisse rien au hasard, le silence prime avant tout. Ils sont pratiquement inaudibles, même sans LNA. Le fabricant fait donc encore une fois très fort, et prouve donc que la technologie se met au service du silence, même pour les petits formats !" (Jean Baptiste Schmitt, ZeDen.net)
04.02.2016 // SmallFormFactor.net
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NF-A8 PWM Opinión

All in all, these products are well built, well designed, and are able to achieve specs that by-and-large merit the premium price asked of them. None of the tested fans exhibited loud operation, and the included accessories ensured that the fans can be used in many different systems.
Resultado del análisis: "It is typical for high-end or “luxury” goods to embrace a brand, style, or ethos, and Noctua does precisely that with their distinctive color scheme. The rest comes down to performance, though, and while you’ll pay top dollar to install a Noctua fan in your build, we’re hard-pressed to imagine how anyone will find themselves disappointed." (John Morrison, SmallFormFactor.net)
02.11.2015 // Hardaily.com
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NF-A8 PWM Opinión

Los ventiladores Serie A de Noctua están recomendados por Hardaily como ventiladores suplementarios (versiones no PWM), sustitutos de ventiladores más modestos o viejos para lograr mejor ventilación. Las versiones PWM son altamente recomendadas por Hardaily como sustitutos en los disipadores o radiadores y para que tengan autocontrol, ya que son los más potentes también. Todos ellos son perfectamente válidos para torres, servidores, para disipadores o incluso radiadores, siempre que sean compatibles con las medidas estandarizadas de 4 8 y 9cm. Todos estos ventiladores de Noctua son de los más duraderos y resistentes del mercado.
Resultado del análisis: "Estos productos son prácticamente perfectos." (Raul Planelles, Hardaily.com)

NA-FC1

  • Controlador compacto y altamente flexible para ventiladores PWM de 4 pines
NF-A8 PWM

NA-SAC5

  • Cable adaptador para ventiladores S-ATA de hasta 4 pines
NF-A8 PWM

NA-SEC1

  • Cables de extensión de 4 pines
NF-A8 PWM

NA-SAV2

  • Soportes anti-vibración
NF-A8 PWM

Manual de instalación (PDF)

Hoja de datos (PDF)

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

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

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

Please note that most network device manufacturers don’t provide detailed documentation regarding fan compatibility and control, so users who want to replace the fans of their devices usually have to rely on “How to” guides, blog and forum posts or video tutorials. Please also note that fan compatibility and control can vary from model to model and even from revision to revision even if the devices stem from the same manufacturer. As a result, it is important to make sure that the information or guidelines you rely on when replacing your fans are applicable to your specific model as well as your specific hardware and firmware revision.

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

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.

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.

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.

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

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.

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.

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 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

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

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 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).

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 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.

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.

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

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

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

Noctua fans such as the 40, 60, 80, 92 or 120mm 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.

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