Product discontinued. Successor model: NF-A9 FLX

Product discontinued.

The NF-B9's highly-optimised blade design achieves an exceptional level of airflow and static pressure that most other fans can only reach at much higher speeds. Bevelled blade tips, Vortex-Control Notches as well as Noctua's SCD drive system and premium-grade SSO-Bearing ensure outstanding quietness and long-term stability.
Bevelled Blade Tips

Bevelled Blade Tips

Due to advanced design measures like the bevelled blade tips, the NF-B9 is surprisingly quiet despite its outstanding airflow and pressure performance.
Vortex-Control Notches

Vortex-Control Notches

Psychoacoustic optimizations like the make the NF-B9's noise pattern more pleasant to the human ear.
Smooth Commutation Drive

Smooth Commutation Drive

The new SC drive system reduces torque variations and thereby ensures improved running smoothness, particularly at lower speeds.
Self-stabilizing oil-pressure bearing

Self-stabilizing oil-pressure bearing

Noctua's well proven SSO-Bearing technology guarantees supremely quiet operation and exceptional long-term stability.
FAN Specification
92x92x25 mm
Rotational Speed (+/- 10%)
1600 RPM
Rotational Speed with L.N.A. (+/- 10%)
1300 RPM
Rotational Speed with U.L.N.A. (+/- 10%)
1000 RPM
Acoustical Noise
17,6 dB(A)
Static Pressure
1,61 mm H₂O
Static Pressure with L.N.A.
1,09 mm H₂O
Static Pressure with U.L.N.A.
0,64 mm H₂O
> 150.000 h
Scope of Delivery
  • Ultra-Low-Noise Adaptor (U.L.N.A.)
  • Low-Noise Adaptor (L.N.A.)
  • 4 Vibration Compensators
  • 3:4-Pin Adaptor
  • 4 Fan Screws
6 years
19.06.2008 // Tech4PCs.com

NF-B9 Review

* Excelente rendimiento
* Bajo ruido, y con posibilidad de ser aun más bajo con los adaptadores.
* Ventilador de alta presión y flujo.
* Tecnología Vortex control con nueve aspas y SSO Bearing.
* El mejor ventilador (ruido/rendimiento) DE 90mm.
* Incluye Sleeving
* Trae los adaptadores necesarios y las gomas anti vibraciones.
* Garantía 6 años
Test verdict: "El mejor ventilador (ruido/rendimiento) DE 90mm." (Servando Silva, Tech4PCs.com)
04.03.2008 // DragonSteelMods.com

NF-B9 Review

As you can see from the results there is a slight performance increase over the NF-9-1600 but not much, only a degree, and we can see that running the NF-B9 at 1600RPMS or 1300RPMS there is no difference in the performance either. Overall, yes we see better temps with the NF-B9 and it's very quiet as well...
Test verdict: " Noctua makes great products and they seem to get better with each revision or re-engineering of them. The NF-B9 is a great choice for those looking for great performance without the added noise that comes with high CFM fans." (Kristofer Brozio, DragonSteelMods.com)
19.02.2008 // XSReviews.co.uk

NF-B9 Review

I found that at the stock speed the fan was audible, but at a much more satisfactory tone than compared to a fan of similar dBA output. Using either of the adaptors and you'll have to come close to becoming Van Gogh before you'll hear the familiar hum of the blade swishing through the air. More importantly, the fan pushes a lot more air than other fans of this size for the same noise output; I couldn't find another 92mm fan that came close to the figures that Noctua list on the box.
Test verdict: "This fan is perfect for people yearning for quiet PC's for their cases, or even their CPU coolers. I've seen many generic PC's that use 92mm fans which are far too loud for what they are doing. Using one of these instead will cost you a little bit more cash, but will allow you to run your PC without the background hum." (Steve Parker, XSReviews.co.uk)
21.04.2011 // mega-labs.com

NF-B9 Review

At our airflow test, Noctua's fan delivered maximum airflow compared to the other contestants. From several previous reviews, we have seen that Noctua specialises in making silent cooling products, and this is proved here, as the NF-B9 proved to perform without annoying the user.
Test verdict: "The NF-B9 was the best performer during our tests, while being silent. We can easily say that this 92mm fan is totally worth the money considering the cooling performance it offers" (Nasioulis Evangelos, mega-labs.com)
12.02.2010 // Techpill.lt

NF-B9 Review

Pagal gautus rezultatus matome, kad Noctua NF-B9, kad ir būdamas toks mažas ventiliatorius, vistiek sugeba padėti aušinti kompiuterį. Ramybės rėžime stulbinančių rezultatų neparodė. Temperatūra sumažėjo tik keletu laipsniu, bet apkrovus procesorių, jo temperatūra buvo net 5 laipsniais mažesnė negu be NF-B9. Tai labai geras rezultatas.
Test verdict: "Taigi, kaip visada Noctua gaminiai parodo geriausius rezultatus, taip ir šis. Jeigu nėra galimybės pajungti didesnio aušintuvo, tai toks mažas taip pat padės atsikratyti šilumos. Ventiliatorius didelio garso neskleidžia, bet norint kad dar tyliau dirbtų galima panaudoti low noise adapterius, su kuriais taip pat kokybiškai aušinsis." (Marius Kavaliauskas, Techpill.lt)
15.10.2009 // Hardmodding.net

NF-B9 Review

Los datos fueron categóricos, Noctua tuvo un mejor desempeño y bajo considerablemente las temperaturas, al parecer sus aspas mejoradas dan una mejor presión estática y por ende un mejor flujo de aire.
Test verdict: "En realidad determinamos que el desempeño de este ventilador es casi insuperable, ya que a esas RPM ningún ventilador te genera esa presión estática y por sobre todo a un nivel sonoro bastante bajo. Como dije anteriormente los datos fueron categóricos y hablan por si solos, Los ventiladores Noctua NF-P12 y NF-B9 fueron diseñados y especializados para lugares donde la pasada de aire es estrecha y aprobaron muy bien esta prueba, superando a sus pares de otras marcas" (Victor Parra, Hardmodding.net)
04.06.2009 // Clunk.org.uk

NF-B9 Review

* Quality and build
* Low Noise
* High Performance for low RPM
* Extras - Comprehensive package
* Sleeved fan cable
* Six year Warranty
Test verdict: "The fan is louder than the 120mm, largely due to the higher speed and smaller size. However compared to other 92mm it is once again way ahead of the competition." (Chris Smith, Clunk.org.uk)
21.05.2009 // hwreviewlabs.com

NF-B9 Review

Noctua probably makes the most advanced case fans in the market, with unique features and specifications that outperform any other fan. NF-B9 fan is a 9cm fan that has high performance and low noise combined with the high quality Noctua always offers.
Test verdict: "Noctua as always made a high quality product that exceeds even the highest expectations. NF-B9 fan is a fusion of high airflow and low noise that can satisfy virtually anyone." (Michalis Michailidis, hwreviewlabs.com)
18.05.2009 // InformaticaEasy.net

NF-B9 Review

Incrementando la distanza tra le pale e il bordo interno del supporto perimetrale della ventola nelle zone più periferiche in cui la ventola raggiunge velocità maggiori, la particolare tecnica di smussamento delle pale della ventola aiuta a ridurre le interazioni critiche tra rotore e statore. Questo stratagemma consente di ridurre la rumorosità prodotta.
Test verdict: "Le due ventole Noctua in esame ben si prestano ad essere collocate su dissipatori high-end per schede video, tra cui il Thermalright. Entrambi i prodotti sono caratterizzati da un'ottima qualità costruttiva ed impiegano materiali di prima scelta oltre a tecnologie proprietarie sviluppate ed implementate per garantire il massimo delle prestazioni." (Paolo Vinella, InformaticaEasy.net)
13.05.2009 // PCBrain.it

NF-B9 Review

Le temperature verranno monitorate in tre situazioni differenti: con dissipatore stock senza ventola (passivo), con ventola originale nVidia ed infine con la Noctua NF-B9. Come possiamo notare nel primo grafico le temperature rilevate con dissipatore completamente passivo sono davvero elevate, la situazione migliora anche se di poco aggiungendo la ventola originale, ma sostituendo quest'ultima con la Noctua, la situazione cambia sostanzialmente con un vantaggio di ben 12°C per il NorthBridge e 15°C per il SouthBridge. La situazione mettendo sotto stress il sistema non cambia di molto, infatti abbiamo un miglioramento delle temperature pari a 14°C per il NorthBridge e 17°C per il SouthBridge. Che dire, risultato stupefacente.
Test verdict: "In conclusione possiamo ritenerci soddisfatti del prodotto inviatoci da Noctua, in quanto grazie alle sue innovazioni e al suo design è di sicuro tra le migliori 92mm in circolazione." (Alessio Vincenzo Cannavale, PCBrain.it)

Information Sheet (PDF)

Can I use Noctua fans on my fan controller?

Our fans are compatible with the vast majority of fan controllers on the market. However, there is a compatibility issue with a few models such as the Zalman ZM-MFC2 and Bitfenix Recon, which apply Pulse Width Modulation (PWM) on the 12V line and use an unfavourable PWM carrier frequency. This can create an oscillation when used with certain fans, which will result in the fan speeding up and down. We therefore recommend not using the Zalman ZM-MFC2 or Bitfenix Recon with our fans.

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.

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.

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 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.


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

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.

Do you have a question concerning one of our products? Please use this form to pose a question!