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
64.3 m³/h
Airflow with L.N.A.
52,6 m³/h
Airflow with U.L.N.A.
41,1 m³/h
Acoustical Noise
17,6 dB(A)
Acoustical Noise with L.N.A.
13,1 dB(A)
Acoustical Noise with U.L.N.A.
7,9* 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.

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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