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
56,9 m³/h
Airflow with U.L.N.A.
38,2 m³/h
Acoustical Noise
6,8* dB(A)
Acoustical Noise with U.L.N.A.
5* 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)

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.

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.


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.

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?

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.

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:


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.

What pin configuration do Noctua 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:


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