Product discontinued. Successor model: NF-S12A ULN

Succeeding the vastly successful NF-S12, the NF-S12B is a next generation quiet fan featuring Noctua's advanced SCD2 technology as well as a highly optimised blade geometry with Bevelled Blade Tips that improves its award-winning predecessor's airflow efficiency by up to 10%. Topped off with Noctua's time-tested SSO-Bearing, 6 years warranty and super-slow 700/500 rpm speed settings, the NF-S12B ULN is a premium quality fan for ultra-low-noise applications where maximum quietness has top priority.

More information:
NF-S12B Blade Design
NF-S12B & NF-P12: Technical Backgrounds
Which fan is right for me?

Highly optimised impeller with Bevelled Blade Tips

Highly optimised impeller with Bevelled Blade Tips

Thanks to its further refined blade geometry with extended leading edges and Bevelled Blade Tips, the NF-S12B achieves up to 10% more airflow and static pressure than its much acclaimed predecessor at the same noise level.
2 speed settings for maximum quietness

2 speed settings for maximum quietness

Providing 700 and 500 rpm speed settings via the supplied adapter, the ULN (Ultra-Low-Noise) version is tailor made for serious silent enthusiasts who demand super-slow running speeds and utmost quietness of operation.
Smooth Commutation Drive 2

Smooth Commutation Drive 2

The latest version of Noctua's advanced SCD drive system ensures superb running smoothness by eliminating torque variations and switching noises.


Noctua's time-tested SSO-Bearing technology has become synonymous with supremely quiet operation and exceptional long-term stability.
FAN Specification
120x120x25 mm
Rotational Speed (+/- 10%)
700 RPM
Rotational Speed with U.L.N.A. (+/- 10%)
500 RPM
Acoustical Noise
6,8* dB(A)
Static Pressure
0,44 mm H₂O
Static Pressure with U.L.N.A.
0,23 mm H₂O
> 150.000 h
Scope of delivery
  • Ultra-Low-Noise Adaptor (U.L.N.A.)
  • 4 Vibration Compensators
  • 3:4-Pin Adaptor
  • 4 Fan Screws
6 years
27.09.2009 // Hardware.xz.lt

NF-S12B ULN Review

Ventiliatorių tvirtinau korpuso priekyje, kad būtų pasiektas didesnis aušinimo efektyvumas. Tvirtinimas labai nesudėtingas. Naudojau guminius vibraciją sugeriančius tvirtinimo elementus. Jei nebūtų galimybės tvirtinti guminiais elementais, galėsite tvirtinti varžtais.
Test verdict: "Įdomu tai, kad dvigubai mažesnėmis apsukomis veikiantis ULN ventiliatorius geba rodyti praktiškai identišką aušinimo efektyvumą standartiniam Cooler Master aušintuvams. NF-S12B ULN buvo toks tylus, kad net buvo kilusi mintis, kad jis iš vis nesisuka." (Eimantas Balta, Hardware.xz.lt)
11.08.2009 // Technews.lt

NF-S12B ULN Review

Įdomu tai, kad dvigubai mažesnėmis apsukomis veikiantys ULN ventiliatoriai geba rodyti praktiškai identišką aušinimo efektyvumą standartiniams Chieftec aušintuvams parduodamiems kartu su korpuso. [...] Kalbant apie keliamą triukšmą, turiu pasakyti, kad ULN ventiliatoriai net ir be adapterių yra tokie tylūs, kad jų sukeliamo garso už 0,5 m visiškai nesigirdėjo, todėl neturime ir duomenų.
Test verdict: "Atvirai pasakius, nesitikėjau tokių rezultatų iš 700 aps./min sparta veikiančio ventiliatoriaus. Efektyvumu trys NF-S12B ULN prilygo dvigubai spartesniems standartiniams Chieftec aušintuvams ir buvo tokie neįtikėtinai tylūs, kad kelis kartus mane užklupo mintis, kad sistema apskritai nustojo veikusi." (Darius Buinauskas, Technews.lt)
28.06.2009 // TopReviewShop.com

NF-S12B ULN Review

The Noctua NF-S12B ULN is an excellent choice for people who want the quietest computer possible.
Test verdict: "If you need the quietest cooling possible, then the NF-S12B ULN is your fan." (William Ford, TopReviewShop.com)
21.06.2009 // Blog.Hitechpc

NF-S12B ULN Review

Comme on le voit immédiatement, les NF S12B survolent le test. A vitesses égales, ou inférieures, ils sont plus performants que le NF P12. Comme dans l’autre test, le Sanyo Denki est très performant aussi, mais avec un effet de bourdonnement insupportable. Les OCZ et CoolerMaster sont, à vitesses plus élevées, moins performants. C’est encore les Noctua qui s’en sortent avec les honneurs.
Test verdict: "Les NF S12B FLX et ULN sont LES ventilateurs qu’ils vous faut pour avoir un flux d’air optimal dans votre boitier. En plus d’apporter une meilleure circulation d’air dans le boitier, ils sont, même à vitesse maximale, plus silencieux que la plupart des autres 120mm. Et pour ne rien gâcher, ils sont quasi aussi performants que les NF P12 pour refroidir vos processeurs. Ils répondent donc aux contraintes des plus exigeant, c’est à dire très performant pour un minimum de bruit!" (Simioli Jean-Philippe, Blog.Hitechpc)
25.05.2009 // ExtremePC.fr

NF-S12B ULN Review

* Qualité générale
* 2 possibiltés de réglages avec adaptateur ULNA
* Rapports flux d'air/bruit, flux d'air/vitesse optimisés
* Silence à toutes fréquences de rotations
* Bundle très fourni
* Consommation très faible
* Roulements SSO Bearing
Test verdict: "En ce qui concerne le NF-S12B ULN, ce ventilateur est très discret, et c'est bien là sa meilleure performance. Conçu pour être silencieux à des vitesses de rotations très basses, le pari est réussi. Ajoutez à cela une consommation ultra faible, et vous obtiendrez une machine à silence de qualité made in Noctua." (David Henriet, ExtremePC.fr)
18.05.2009 // VirtuaLegion.com

NF-S12B ULN Review

- Máximo silêncio
- Qualidade de construção
- Melhorias em relação às S12 originais
- Longevidade
- 6 anos de garantia
- Acessórios incluídos
Test verdict: "É nesta última situação em que a S12B ULN se enquadra melhor. A menor rotação e o menor ruído são ideais para um sistema refrigerado a água, e o airflow que produz é suficiente para manter a circulação de ar dentro da case." (Luis Dias, VirtuaLegion.com)

Information Sheet (PDF)

The fan doesn’t start with the Ultra-Low-Noise Adaptor (ULNA)!

Unfortunately, many Gigabyte mainboards use a special control circuit that can lead to start-up problems in conjunction with the Ultra-Low-Noise Adaptor (ULNA). This control circuit remains active even when automatic fan control is disabled in the BIOS. In these cases, please use the fan without the ULNA or connect it directly to the power supply (or an external fan controller) in order to ensure reliable operation with the ULNA.

Can I run Noctua 3-pin fans on 4-pin PWM connectors and use my mainboard’s automatic fan controller?

You can simply connect our fan's 3-pin connector to the 4-pin PWM sockets of today's mainboards so that the fourth pin that transmits the PWM signal is left blank (due to the shape of the connector, there's no danger of reversing polarity). Some mainboards (e.g. current Gigabyte models) are capable of controlling fans not only via PWM, but also by adjusting the supplied voltage. In some cases, this may require you to change BIOS options like "Fan Control Mode" from "PWM" to "Voltage" or "Analog". Please consult your mainboard's manual in this regard. However, some mainboards use an "auto" setting by default that automatically chooses PWM or voltage based regulation according to the connected fan. Automatically controlling the fan speed may not possible on mainboards that pulse the power rather than lowering the fan voltage.


My fan doesn’t spin when I start up the PC - is it faulty?

If you've connected the fan directly (or using the supplied Low-Noise or Ultra-Low-Noise-Adaptors) to your mainboard, it's possible that the mainboard's automatic fan controller doesn't provide the required starting voltage due to the low CPU temperature. Please verify whether the fan starts spinning at higher CPU temperatures, remove any Low-Noise or Ultra-Low-Noise Adaptors, deactivate your mainboard's automatic fan controller in the BIOS or connect the fan directly to the power supply using the supplied 3:4-pin adaptor.

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 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.

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 use Noctua fans in my system from Acer, Apple, Dell, HP, Lenovo or other major brands?

Noctua 12V fans comply with the established specifications for standard PC systems issued by Intel and AMD. Systems from Acer, Apple, Dell, HP, Lenovo or other major brands often deviate from these specifications e.g. by using proprietary fan headers, custom pin-alignments or pin-configurations, different methods of fan speed control, etc. This can lead to compatibility issues when using Noctua fans in systems from said brands. Some of these problems can be avoided with some technical knowledge, but especially BIOS related issues (e.g. errors or shutdowns due to low fan speed) can often not be resolved. As a result, Noctua does not officially support systems from Acer, Apple, Dell, HP, Lenovo or other major brands.

Can Noctua fans be used to replace noisy stock fans in 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 Low-Noise Adaptors with y-cables / multiple fans?

Yes, Low-Noise Adaptors (L.N.A.s) can be used with y-cables, but please make sure to use one L.N.A. per fan and to place the L.N.A.s between the y-cable and the fans as shown below. Never use one L.N.A. for two (or more fans) by placing it between the mainboard and the y-cable!


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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