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Product discontinued. Successor model: NF-A9 PWM

Product discontinued.

The classic NF-B9 92mm fan helped to found Noctua’s reputation as a top-tier manufacturer of premium quality quiet cooling components and still impresses users with its exquisite quietness and superb performance. The new PWM version features Noctua’s novel, custom designed PWM IC for fully automatic control and ultra-low power consumption. Equipped with Noctua’s signature SSO-Bearing and topped off with a 6 years manufacturer’s warranty, the NF-B9 PWM is a proven premium choice for the highest demands.
Details
Proven NF-B9 Design

Proven NF-B9 Design

Tens of thousands of quiet cooling enthusiasts swear by Noctua's classic NF-B9. Its impressive quietness, excellent performance and impeccable, time-tested quality made the B9 a default choice for 92mm quiet cooling.
Bevelled Blade Tips

Bevelled Blade Tips

Reducing critical rotor stator interaction, the NF-B9's Bevelled Blade Tips permit to combine a higher blade surface area with quieter operation and thus form a cornerstone of the fan's outstanding efficiency.
Vortex-Control Notches

Vortex-Control Notches

Noctua's signature Vortex-Control Notches split up trailing edge vortices and thus spread the fan's noise emission over a wider range of frequencies. This measure makes the NF-B9 PWM sound more pleasant to the human ear.
Custom-designed PWM IC with SCD

Custom-designed PWM IC with SCD

Supporting fully automatic PWM speed control, the NF-F12 uses Noctua's novel, custom-designed NE-FD1 PWM IC that integrates Smooth Commutation Drive (SCD) technology. By providing smoother torque impulses, SCD suppresses PWM switching noises and thus makes the fan quieter at lower speeds.
Low-Noise Adaptor

Low-Noise Adaptor

The NF-B9 PWM is supplied with a (L.N.A.) that reduces the maximum fan speed from 1600 to 1300rpm. The L.N.A. can be used either to run the fan at a fixed speed of 1300rpm or to cap the maximum speed when using automatic PWM control.
Extensive cabling options

Extensive cabling options

The fan's short 20cm primary cable minimises cable clutter in typical applications while the supplied 30cm extension provides extended reach when necessary. Both cables are fully sleeved and a 4-pin y-cable allows the connection of a second NF-B9 fan to the same PWM fan header for automatic control.
SSO-Bearing

SSO-Bearing

Combining the proven concept of hydrodynamic bearing with an additional magnet that supports the self-stabilisation of the rotor axis, Noctua's time-tested technology has become synonymous with supremely quiet operation and exceptional long-term stability.
6-year manufacturer’s warranty

6-year manufacturer’s warranty

Noctua fans are renowned for their impeccable quality and outstanding longevity. Like all Noctua fans, the NF-B9 PWM features an MTBF rating of more than 150.000 hours and comes with a full 6-year manufacturer's warranty.
NF-B9 PWM
FAN Specification
Size
92x92x25 mm
Mounting hole spacing
82,5x82,5 mm
Connector
4-Pin PWM
Bearing
Blade Geometry
Rotational Speed (+/- 10%)
1600 RPM
Rotational Speed with L.N.A. (+/- 10%)
1300 RPM
Min. Rotational Speed (PWM, +/-20%)
300 RPM
Acoustical Noise
17,6 dB(A)
Acoustical Noise with L.N.A.
13,1 dB(A)
Static Pressure
1,61 mm H₂O
Static Pressure with L.N.A.
1,09 mm H₂O
Max. Input Power
0,96 W
Max. Input Current
0,08 A
Voltage
12 V
MTBF
> 150.000 h
Scope of Delivery
  • Low-Noise Adapter (L.N.A.)
  • 4-Pin Y-Cable
  • 30cm Extension Cable
  • 4 Vibration-Compensators
  • 4 Fan Screws
Warranty
6 years
NF-B9 PWM
27.01.2013 // ElektronikTest.dk
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NF-B9 PWM Review

Så blev de montere og testet med bundkortets PWN styriign og det forløb uden problemer, jeg har ikke kunnet høre noget støj fra dem selvom de køre på fuld blæs.
Test verdict: "Nu har jeg haft et par forskellige Noctua produkter i mellem hænderne og de har alle sammen gjort det rigtig godt. Deres kvalitet samt udvikling er noget af det jeg bider mærke i, her har de en stor fordel i at de ikke laver så mange nye produkter men i stedet optimerer og gør tingene bedre." (John Thorn, ElektronikTest.dk)
02.09.2012 // rbmods.com
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NF-B9 PWM Review

We plugged in the case fan slot of our motherboard and disabled the PWM function to use the fans at their full speed. We also tested the fans at PWM speeds and with L.N.A adapter without PWM. Noise levels with all the fans are similar. In PWM mode, with our test setup, the fans were running at minimum speed nearly the whole time. Only after extensive 3DMark Vantage sessions the fan speed rose above the minimum. Even then the fans were very silent. With L.N.A adapter one could barely hear the fans. When we disabled the PWM and ran the fans at 12V, they were clearly audible. However, increasing noise comes with increasing performance. We saw about 2C decrease in overall temperature of the case when using the 120mm fan as our exhaustfan compared to the situation where the same fan was used with L.N.A adapter or PWM. Yet again Noctua did not disappoint us. The quality is on par with previous incarnations of their fans and performance is also on a very good level.
Test verdict: "If you can live with the pricetag Noctua is a great choice. All three fans were absolutely one of the most silent one’s I’ve encountered, and while there definitely are more powerful fans available – the Noctua fans should be more than enough for cooling your case, processor cooler or even your water coolers radiator. All the fans are PWM controlled so you can control their speeding behaviour from your bios or from your motherboards control utility in your operating system. I can recommend all these fans to whoever who is looking for silent, yet reasonably powerful fan, and does want the PWM feature. Noctua won’t let you down in terms of quality!" (Ville Ilonen, rbmods.com)
25.05.2012 // CoolingTechnique.com
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NF-B9 PWM Review

Tirare delle conclusioni sulle nuove proposte di Noctua non è decisamente semplice; la casa austriaca questa volta mette decisamente tanta carne al fuoco con un "know how" costruttivo che se paragonato a quello delle aziende concorrenti mette decisamente in imbarazzo per la propria superiorità in campo fluidodinamico e non solo. Partendo da un punto di vista meramente qualitativo, le ventole offerte dalla casa austriaca sono tutte dotate di un eccellente qualità dei materiali e costruttiva; tutte le saldature di interconnessione tra i profili palari e il rotore centrale vengono fatte in maniera pressochè perfetta, con margini di tolleranza ridotti all'osso e con una struttura nel complesso decisamente ben curata in ogni sua minima parte. A sostegno di cio c'è la cura quasi maniacale dedicata allo sleeving dei cavi di controllo e di alimentazione, essa viene effettuata con una calza in multifilamento ad alta copertura siliconata, terminata da generosi tratti di termorestringente nero che ne assicura la presa e la stabilità nel tempo; a ciò viene inoltre affiancata una sleevatura direttamente nel frame della ventola che prevede specifici ponti in plastica per il mantenimento in sede dei cavetti che vanno al motore SSO della casa.
Test verdict: "Il lavoro impressionante effettuato da Noctua si vede infine nel grafico del pescaggio che solitamente pone come fanalino di coda le ventole aventi alte pressione statiche, questo con le ventole in oggetto non succede ma anzi le inserisce in vetta esaltando l'ottimo bilanciamento che gli ingegneri della casa sono riusciti a tirare fuori in maniera pressochè esemplare meritando sicuramente i nostri complimenti per il lavoro svolto." (Damiano Villa, CoolingTechnique.com)
30.04.2012 // islaBit.com
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NF-B9 PWM Review

El NOCTUA NF-B9 PWM es un ventilador de gama alta que está Recomendado por islaBit para equipos medianos, HTPC y torres pequeñas, además de pequeños radiadores o disipadores que necesiten un ventilador de 9cm con gran caudal y baja sonoridad. Además, este modelo se lleva el Premio Rendimiento islaBit, por incluir la tecnología PWM, su bajo consumo y por superar a la mayoría de ventiladores de 9cm que hay actualmente en el mercado, que tan solo son capaces de superar su caudal alcanzando ruidos de más de 29dBA, cuando este modelo contiene su nivel por debajo de los 18dBA de sonoridad máxima.
Test verdict: "Si buscas un ventilador duradero de 9cm, con excelente relación rendimiento/sonoridad, el NF-B9 PWM de Noctua seguro que da la talla." (Raúl Planelles, islaBit.com)
24.04.2012 // HWMaster.com
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NF-B9 PWM Review

La NF-P12 PWM è ottima con dissipatori e radiatori, o come ventola per case, la NF-B9 PWM è una ventola destinata all’utilizzo su dissipatori per cpu di dimensioni inferiori o su dissipatori per vga, la NF-R8 PWM è perfetta per raffreddare in maniera concentrata un determinato componente (ram, chipset, vrm). I prezzi, in apparenza elevati, sono giustificati dal bundle ricco e dalla qualità costruttiva.
Test verdict: "Con la nuova famiglia di ventole PWM, Noctua ha dotato arricchito tecnicamente le sue gia ottime ventole. I consumi sono stati ridotti visibilmente e c’è tutta la comodità del PWM. Consigliamo queste ventole a chiunque voglia raffreddare in maniera efficiente il proprio computer, sena rinunciare al silenzio." (Rocco Eduardo Battista, HWMaster.com)
05.04.2012 // Whitex-Modd.de
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NF-B9 PWM Review

Ebenfalls werden im Video alle Modelle mit einem einfachen Mikrofon, das die Lautstärke aus 10cm Entfernung misst, auf ihr Geräuschlevel getestet. Um eine weitere Orientierung im Sinne der Geräuschkulisse zu geben, haben wir zusätzlich 3 weitere Lüfter (Sharkon Silent Eagle 2000-80mm, 2000rpm @38,5m³/h, Enermax Magma-120mm, 1500rpm @117,49m³/h und ein standart-Gehäuselüfter-120mm, 1000rpm) sowie eine etwas ältere und lautere IDE-Festplatte @7200rpm dem Lautstärketest unterzogen. Schlussfolgernd kann man an dieser Stelle sagen, dass die Lüfter alle sehr gut abgeschnitten haben.
Test verdict: "Oft sind Markenlüfter überteuert und der Preis ist nicht gerechtfertigt. Ob es sich allerdings lohnt, etwas mehr Geld für Noctua-Produkte auszugeben? -Wir sagen: Ja! Die neue Lüfterserie ist aus unserer Sicht eine klare Kaufempfehlung und man hört die Qualität im wahrsten Sinne des Wortes heraus." (Tobi Borho, Whitex-Modd.de)
19.03.2012 // PCEkspert.com
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NF-B9 PWM Review

Kvaliteta izrade i materijala, kako P12, tako i B9 i R8 je na najvišoj razini. Priložena oprema (Y-adapteri, L.N. adapteri, produžni napojni kabel, vijci i gumeni čepići) je bogata, a u korisničkim nam se uputama najviše sviđa objašnjenje o održavanju ventilatora. Šlag na tortu je šest godišnje jamstvo proizvođača.
Test verdict: "svakako je riječ o proizvodima koji su u vrhu svojih klasa." (Krešimir Matanović, PCEkspert.com)
08.03.2012 // 1et2.it
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NF-B9 PWM Review

La ventola Noctua NF-B9 PWM ha una rotazione massima a 12 Volt di 1600 rpm (rotazioni per minuto) e a tale velocità produce un flusso d’aria potente ed elevato e il rumore che si percepisce è quello di una turbolenza ovattata a toni bassi: più un tono è basso e meno è percepito come disturbante. Questo è il risultato della ricerca condotta da Noctua per migliorare le sue ventole: nessuna ventola ad alte velocità sarà mai completamente silenziosa, ma lavorare sulla riduzione dei flussi turbolenti ha portato proprio a questo “suono” che è tipico delle ventole Noctua e che è diventato un vanto riconosciuto a livello mondiale.
Test verdict: "La ventola Noctua NF-B9 PWM è chiaramente un prodotto eccellente che vanta caratteristiche uniche. La silenziosità a bassi regimi è garantita (pure nel tempo) per un utilizzo in ambienti dove il silenzio deve regnare senza però rinunciare al raffreddamento dei componenti del computer (per esempio un HTPC). Ma anche quando le condizioni richiedono un flusso maggiore di aria, la Noctua NF-B9 PWM sa dimostrarsi all’altezza mantenendo comunque basso e ovattato il rumore." (Massimo Maccalli, 1et2.it)
20.02.2012 // TodoHTPC.com
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NF-B9 PWM Review

Yo diría que es casi imposible equivocarte al comprarte un equipo de Noctua. Y con el NF-B9 PWM se vuelve a comprobar que Noctua sigue en lo mas alto de la disipación por aire. El NF-B9 incorpora las últimas tecnología desarrolladas por Noctua, todas ellas orientadas a maximizar el rendimiento y minimizar el ruido. La última de ellas es el controlador PWM NE-FD1, que permite reducir el nivel sonoro y optimizar el consumo. Esta es la principal diferencia con respecto a su predecesor NF-B9. Noctua ha incorporado todo tipo de adaptadores y tornillos necesarios para la instalación del ventilador. Incluso un pequeño manual nos explicará como colocar el ventilador Una vez instalado el resultado no puede ser mejor, es casi imposible escuchar el ventilador. En nuestro caso consigue mantener perfectamente refrigerado un equipo completo. El precio es quizás lo único que puede echarnos atrás, ronda los 20 Euros. Es un precio alto si lo comparamos con otros ventiladores, pero el silencio y la disipación que ofrece son difíciles de obtener.
Test verdict: "En resumen, si necesitamos un ventilador de caja de 92mm el NF-B9 PWM es casi con total seguridad el mejor ventilador. Gracias a la tecnología de Noctua, es difícil escucharlo y la refrigeración es fantástica. Desde TodoHTPC ha obtenido nuestro sello de producto recomendado." (Abel Hernández Valero, TodoHTPC.com)
15.02.2012 // HardZone.es
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NF-B9 PWM Review

A mínimas revoluciones es inaudible, y ya a estas rpm mueve un buen flujo de aire. Conectado a la placa base por PWM comienza a notarse el ruido del aire pasando por las aspas, pero es algo que dentro de una caja ni se notaría.
Test verdict: "Una vez más, Noctua lo ha vuelto a lograr: ha mejorado algo que ya de por sí era sobresaliente. Los nuevos ventiladores de Noctua ahora cuentan con el valor añadido de que pueden ser controlados directamente por la placa base del ordenador en función de la temperatura. Silenciosos y potentes, los nuevos ventiladores de Noctua con función PWM no defraudarán a nadie." (Rodrigo Alonso, HardZone.es)

Installation Manual (PDF)

Information Sheet (PDF)

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.

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.

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.

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).

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.

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