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Conceived for industrial heavy duty applications that require enhanced cooling performance and advanced ingress protection, the NF-F12 industrialPPC (Protected Performance Cooling) is a ruggedised high-speed version of the award-winning retail model. The 24V variant uses a dedicated wide input range version of Noctua's NE-FD2 motor driver IC in order to support 24V-based industrial applications. Thanks to the outstanding aerodynamic efficiency of the NF-F12 design and the use of a novel three-phase motor, the industrialPPC version provides superior airflow and pressure capacity while keeping noise levels and power consumption moderate as against comparable high-speed fans. While its fibre-glass reinforced polyamide construction and certified water and dust protection make the NF-F12 industrialPPC suitable for operation in challenging environments, the renowned SSO2 bearing technology guarantees an MTBF of over 150.000hrs. Topped off with Noctua’s trusted reliability and 6 years manufacturer’s warranty, the NF-F12 industrialPPC is an ideal choice for highly demanding applications that require superior flow rates and ultimate dependability.
Details
Award-winning NF-F12 design

Award-winning NF-F12 design

Having received more than 150 awards and recommendations from the international press, Noctua's NF-F12 has become a proven premium choice for 120mm cooling needs. Its renowned efficiency has convinced tens of thousands of customers all over the world.
2000rpm industrialPPC version

2000rpm industrialPPC version

Thanks to its elevated 2000rpm top speed, the NF-F12 industrialPPC-2000 provides a significant performance boost over the 1500rpm retail version. Combined with the industrialPPC series' robust polyamide construction and advanced protection features, this makes the fan ideal for challenging industrial applications.
24V version

24V version

The industrialPPC 24V models use a dedicated wide input range version of Noctua's NE-FD2 three-phase PWM motor driver IC. Supporting operating voltages from 6 to 30V, these models are ideal for 24V-based industrial applications and voltage- or PWM-based speed control.
Lower speed and noise levels in 12V PC environments

Lower speed and noise levels in 12V PC environments

While the industrialPPC 24V model has been designed with 24V industrial applications in mind, it runs at a maximum speed of around 1050rpm in 12V PC environments and can be slowed down further via PWM, thus combining industrialPPC features and design with Noctua’s signature quietness.
Three-phase motor design

Three-phase motor design

While most axial fans use single-phase motors with 4 slots, Noctua's industrialPPC fans feature a three-phase design with 6 slots, which provides smoother transitions between the slots and thus allows for even higher running smoothness, further reduced vibrations and unprecedented energy efficiency.
Certified IP67 water- and dust protection

Certified IP67 water- and dust protection

The motor and PCB of the IP67 version are completely cast in a special, highly heat conductive resin that combines thoroughgoing protection and effective motor heat dissipation. Complying with the ingress protection rating IP67, this fan is not only fully dust tight but also completely waterproof up to 1m water depth.
Fibre-glass reinforced polyamide construction

Fibre-glass reinforced polyamide construction

Both the impeller and the frame of Noctua’s industrialPPC fans are made entirely from fibre-glass reinforced polyamide. This material can withstand temperatures up to 140°C and makes the fans even more robust and break-proof than Noctua’s standard fibre-glass reinforced PBT fans.
Focused Flow™ Frame

Focused Flow™ Frame

Designed for pressure demanding applications such as heatsinks and radiators, the Focused Flow™ frame features eleven stator guide vanes that straighten, channel and focus the airflow, which allows the NF-F12 to rival the performance of conventional fans running at much faster speeds.
Heptaperf™ Impeller

Heptaperf™ Impeller

Custom designed for the new Focused Flow™ frame and to work in tandem with the eleven stator guide vanes, the NF-F12's seven blade Heptaperf™ impeller has been carefully optimised to achieve a perfect balance between power and quietness.
AAO Frame

AAO Frame

Noctua's AAO (Advanced Acoustic Optimisation) frames feature integrated anti-vibration pads as well as Noctua's proprietary Stepped Inlet Design and Inner Surface Microstructures, both of which further refine the fan's performance/noise efficiency.
Stepped Inlet Design

Stepped Inlet Design

Noctua's Stepped Inlet Design adds turbulence to the influx in order to facilitate the transition from laminar flow to turbulent flow, which reduces tonal intake noise, improves flow attachment and increases suction capacity, especially in space-restricted environments.
Inner Surface Microstructures

Inner Surface Microstructures

With the tips of the fan blades ploughing through the boundary layer created by the Inner Surface Microstructures, flow separation from the suction side of the blades is significantly suppressed, which results in reduced blade passing noise and improved airflow and pressure efficiency.
Integrated Anti-Vibration Pads

Integrated Anti-Vibration Pads

Integrated Anti-Vibration Pads made from extra-soft silicone minimise the transmission of minute vibrations while maintaining full compatibility with all standard screws and other mounting systems.
SSO2 Bearing

SSO2 Bearing

The NF-F12 industrialPPC features the further optimised second generation of Noctua's renowned, time-tested SSO bearing. With SSO2, the rear magnet is placed closer to the axis to provide even better stabilisation, precision and durability.
Metal bearing shell

Metal bearing shell

In order to guarantee the highest possible degree of manufacturing precision, minimum tolerance and excellent long-term stability, the NF-F12 industrialPPC sports a CNC milled bearing shell made entirely from brass.
Custom-designed PWM IC with SCD

Custom-designed PWM IC with SCD

Supporting fully automatic PWM speed control, the NF-F12 industrialPPC uses Noctua's custom-designed NE-FD2 PWM IC for three-phase motors. The NE-FD2 integrates Noctua's proprietary Smooth Commutation Drive (SCD) technology, which suppresses PWM switching noises and thus makes the fan quieter at lower speeds.
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-F12 industrialPPC features an MTBF rating of more than 150.000 hours and comes with a full 6-year manufacturer’s warranty.
Customisable for industry clients

Customisable for industry clients

For industry clients, various features, certificates, packaging options and accessories can be customised on requests. For example, we can provide different connectors and speeds, different cable length or UL and TÜV certification. Please feel free to contact us for customised offers!
NF-F12 industrialPPC-24V-2000 IP67 PWM
FAN Specification
Size
120x120x25 mm
Mounting hole spacing
105x105 mm
Connector
4-Pin PWM
Bearing
Blade Geometry
Heptaperf™
Frame Technology
Rotational Speed (+/- 10%)
2000 RPM
Min. Rotational Speed (PWM, +/-20%)
450 RPM
Rotational Speed @ 12V (+/- 10%)
1050 RPM
Acoustical Noise
29,7 dB(A)
Static Pressure
3,94 mm H₂O
Max. Input Power
1,68 W
Max. Input Current
0,07 A
Voltage
24 V
MTTF
> 150.000 h
Scope of Delivery
  • Fan
  • 4 Fan Screws
Warranty
6 years
Ingress Protection
IP67
Material
Fibre-glass reinforced polyamide
Motor type
NF-F12 industrialPPC-24V-2000 IP67 PWM
Video Reviews
The following video reviews have not been created by Noctua. Responsibility for the information and views expressed in the videos lies entirely with the authors.
language
language
11.11.2016 // Vmodtech.com
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NF-F12 industrialPPC-24V-2000 IP67 PWM Review

ก็มาถึงบทสรุปนะครับสำหรับการทดสอบ Noctua NF-F12 industrialPPC-24V-2000 IP67 PWM ที่วันนี้ถือว่าทำผลงานได้ยอดเยี่ยมเหมือนเช่นเคยครับ กับแรงลมที่ออกมาดีเลยครับอาจแรงไม่เท่ารุ่นท๊อปแต่การทดสอบนั้นสามารถใช้งานกับฮีตซิงค์ใหญ่ๆที่เน้นการระบายร้อนที่รวดเร็วได้สบายๆครับ รวมไปถึงเสียงรบกวนที่เงียบลงกว่ารุ่นท๊อปอย่างมากเลยครับคือเสียบปลั๊กนี่แทบไม่รู้สึกเลยครับว่าพัดลมหมุนแล้ว ก็สมกับมาตรฐานเทคโนโลยีในมาตรฐาน industrialPPC (Protected Performance Cooling) รวมไปถึงชุดมอเตอร์นั้นเป็นมอเตอร์แบบ 3เฟสมอเตอร์ที่ช่วยสร้างประสิทธิภาพของแรงลมที่สูงถึง 2000รอบต่อนาทีพร้อมการรองรับการใช้งานยาวนานถึง 150,000 ชั่วโมงกันเลยทีเดียว อีกทั้งตัวตลับลูกปืน bearing ของ Noctua NF-F12 industrialPPC-24V-3000 IP67 PWM ที่ได้รับการพัฒนาตลับลูกปืนเป็นรุ่น SSO2 ที่ได้รับการพัฒนามาในเวอร์ชั่นที่2 ที่ถือว่าเป็นจุดเด่นเลยก็ว่าได้ครับที่สามารถเสถียรภาพในการทำงานรวมไปถึงความทนทานที่มากขึ้นกว่าเดิมอีกด้วย ในส่วนของดีไซน์ใบพัดได้รับการออกแบบเป็น Heptaperf Impeller ที่มีใบพัดลมถึง 7ใบในการสร้างแรงลมที่มีประสิทธิภาพที่สร้างความสมดุลระหว่างแรงลมและเสียงรบกวน พร้อมทั้งชุด Focused Flow Frame โดยมีทั้งหมด 11เสาครับ พร้อมรอยหยักทั้ง 3 ช่วยสร้างการไหลเวียนของอากาศให้ดียิ่งขึ้น โดยฟีเจอร์นั้นไม่ต่างจากรุ่นท๊อปครับคือ Noctua นั้นใช้วัสดุที่เป็นเกรดเดียวกันหมดทั้ง ใบพัดลม ลูกปืน และมอเตอร์ ถือเป็นมาตรฐานการใช้งานที่เน้นความคงทนและมาพร้อมประสิทธิภาพได้เป็นอย่างดีเลยครับ ท่านใดกำลังมองหาพัดลมที่เน้นความเงียบแต่ยังสร้างแรงลมการไหลเวียนของอากาศที่กระจายแบบทั่วถึงอย่างยอดเยี่ยมแล้วล่ะก็ Noctua NF-F12 industrialPPC-24V-2000 IP67 PWM รุ่นนี้คืออีกหนึ่งตัวเลือกที่น่าสนใจเป็นอย่างมากครับ โดยราคาวางจำหน่ายอยู่ประมาณ 9XX บาทไทย สำหรับวันนี้ผมก็ขอตัวลาไปก่อน สวัสดีครับ
Test verdict: "วันนี้ในการทดสอบผมลองต่อทดสอบกับเมนบอร์ดโดยตรงครับแรงลมนั้นแรงเลยทีเดียวครับ ซึ่งในโหมดธรรมดาจะทำงานอยู่ประมาณ 450รอบต่อนาที แต่ถ้าใช้งานแบบเต็มที่รอบจะอยู่ที่ 2000รอบต่อนาที ในการทดสอบแรงลมที่ออกมานั้นก็ถือว่าดีเลยครับอาจจะไม่เท่าตัว 3000รอบต่อนาทีแต่มันก็ยังแรงพร้อมใช้งานกับบรรดาฮีตซิงค์รุ่นใหญ่ๆหรือแม้กระทั่งระบายอากาศภายในเคสได้อย่างมีประสิทธิภาพแน่นอนครับ การไหลเวียนของอากาศ Air Flow นั้นทำได้ดีมากครับลมที่ออกมานั้นกระจายได้เต็มมากๆไม่ต่างจากรุ่นพี่ครับ เสียงรบกวนนั้นแทบไม่ได้ยินเสียงรบกวนครับเงียบกริบมากเบาลงกว่ารุ่นพี่เยอะเลยครับ ใครที่มองหาพัดลมเงียบๆน่าจะเข้าทางเลยครับ" (Vmodtech.com)
09.11.2016 // PC-Gaming.it
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NF-F12 industrialPPC-24V-2000 IP67 PWM Review

Eccoci arrivati alle conclusioni, ovviamente come tradizione siamo rimasti piuttosto colpiti dalle nuove fan 24v di Noctua. Noctua si rivela sempre una garanzia quando si tratta i ventole o sistemi di dissipazione complessi, ma ciò che contraddistingue l’azienda è la continua ricerca verso la perfezione, su prodotti orientati a tutte le fasce. Sia che acquistate prodotti low o performance/enthusiast, la cura dei dettagli sarà sempre maniacale, ed ogni prodotto è sempre al top. Le nuove IPPC sono fenomenali e fin troppo potenti per i sistemi medio/alti, la pressione d’aria è notevole, il rumore non eccessivo e le ventole non vanno mai a regime massimo in quanto superfluo. I dispositivi Chromax consentono di scegliere tutte le personalizzazioni ed i colori a proprio piacere.
Test verdict: "Chiaramente sono un acquisto consigliato, ed aggiungerei praticamente obbligato, se davvero si vuol tenere al fresco il proprio PC." (Matteo Carrara, PC-Gaming.it)
29.10.2016 // Top10Games.es
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NF-F12 industrialPPC-24V-2000 IP67 PWM Review

Noctua ha trabajado muy bien y ha realizado correctamente su trabajo con esta nueva gama, más destinada a equipos tipo servidores que estén encendidos mucho tiempo, dado a que posee un buen caudal de aire y una larga duración. También debido a sus revoluciones, ofrecen más ruido que su anterior gama Redux, un dato quizás importante a la hora de adquirir uno de estos IndustrialPPC. Noctua también ha mejorado en el aspecto de la personalización, pues ha mejorado, permitiendo añadir colores personalizados a nuestros ventiladores IndustrialPPC gracias a la gama de accesorios Chromax, la cual nos ha encantado.
Test verdict: "Noctua ha lanzado esta gama de ventiladores muy profesionales con un buen caudal de aire y refrigeración. Además gracias al soporte de su nueva gama Chromax, podemos personalizarlo para que se adapte como nos gusta a nuestro equipo." (Adrián José Pérez Toré, Top10Games.es)
23.07.2016 // Formula Hardware
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NF-F12 industrialPPC-24V-2000 IP67 PWM Review

Entrando más en detalle, podemos ver como el propio diseño de los ventiladores es muy distinto al que Noctua nos tiene acostumbrados, siendo estos en color negro y las gomas anti vibración en color granate oscuro, como ya vimos en la review de la serie IndustrialPPC de 12V. Construidos en poliamida reforzada con fibra de vidrio y motor trifásico con el sistema de rodamientos SSO2, los ventiladores IndustrialPPC nos ofrecen una gran calidad de materiales muy robustos, y un tiempo de vida medio superior a las 150.000 horas. Todos ellos cuentan con certificado de protección IP67 que los hacen perfectos para su uso industrial, de ahí su nombre, debido a que aseguran su protección total ante el polvo y permiten ser sumergidos en agua hasta un máximo de un metro.
Test verdict: "La serie IndustrialPPC 24V está enfocada para su uso industrial, por ello, su nombre, y esta versión de 24V con más motivo, a diferencia de los modelos de 12V. Por ende, se pueden considerar unos ventiladores todoterrenos, capaces de funcionar tanto a 12V como 24V de tensión." (Asis Ferrer, Formula Hardware)
22.06.2016 // DVTests.com
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NF-F12 industrialPPC-24V-2000 IP67 PWM Review

I believe I spent some quality time having fun with the most powerful models in the series, which according to their capabilities and the rated operational voltage, combined with the IP67 dust and water protection are totally made for industrial purposes. Products which are designed following the Noctua standards and quality demands to feature a wide range of technologies together to deliver the best possible cooling performance in heavy duty environments.
Test verdict: "[B]oth of the fans are capable to operate at 12V, which additionally boosts their compatibility options, which also makes them a good choice for regular or enthusiastic customers who require and demand high airflow and high static level pressure from the cooling fans to keep their machines working cool and stable for a long time. And this makes both of the fans a really good choice to be used as CPU cooler fans installed on a heat sink or water cooling radiator" (Dobrin Krastev, DVTests.com)
28.05.2016 // Modders-Inc.com
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NF-F12 industrialPPC-24V-2000 IP67 PWM Review

While the 24V models are primarily designed for industrial applications and requiring 24V to run at their full 2000 and 3000 high RPM ratings, they are not completely out of place inside a regular desktop system. At 12V, they operate as low-noise versions of the regular Industrial PPC and with added IP67 ruggedization of course. This protection is somewhat of an overkill on a regular desktop but it does ensure that it will operate much longer than any other fan without, living up to its warranty life. [...] In terms of performance, the 24V Industrial PPC running at 12V show very good thermal management and reaching much lower noise levels than other fans. These low noise levels are more in-line with what is typically expected of Noctua rather than the usual powerful Industrial PPC line. The larger AF-14 in particular has very good sound signature that is even across all levels.
Test verdict: "Well-engineered and rugged with a propensity for silent performance plugged into a normal desktop system, the 24V Industrial PPC fans are just as impressive as the other Noctua fan offerings." (Ron Perillo, Modders-Inc.com)
22.05.2016 // hwbox.gr
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NF-F12 industrialPPC-24V-2000 IP67 PWM Review

Θα σας προτείναμε τους 24v NF για το σύστημά σας; Με το χέρι στην καρδιά, αν θέλετε απλά δύο καλά fans για το AIO σας η εταιρία ήδη έχει πολλές καλές προτάσεις στο 12 Volt line up της, χαρακτηριστικό που σας αφήνει διαθέσιμο μεγαλύτερο εύρος ταχυτήτων περιστροφής. Από την άλλη, αν διαθέτετε custom υδροψύξεις που ήδη απαιτούσαν "περίεργες" τάσεις, αν σας συγκινούν οι IP προδιαγραφές και πιστεύετε ότι για ειδικότερους λόγους (βρώμικο περιβάλλον εργασίας, υγρασία, κραδασμοί κτλ) οι επιπλέον αντοχές ενός τέτοιου σκληροτράχηλου ανεμιστήρα θα είναι ευεργετικές για την δική σας εφαρμογή ή αν απλά αγοράζετε ανεμιστήρες σήμερα που δεν αποκλείεται να ξαναχρησιμοποιήσετε σε άλλα project σας στο μέλλον, τότε οι 24v σειρά της Noctua σίγουρα διαθέτουν το κάτι παραπάνω που τους κάνουν να ξεχωρίζουν από τους υπόλοιπους "πολιτικούς" ανεμιστήρες. Προσωπικά, θέλω την Noctua στην industrial κατηγορία. Θα μου άρεσε π.χ. να ανοίξω ένα τροφοδοτικό ή έναν ενισχυτή και να συναντήσω μέσα fans της εταιρίας μιας και με έχει πείσει από καιρό για την εμμονή της στην λεπτομέρεια και για προσέγγισή της στο θέμα ποιότητα κατασκευής και quality control. Οπότε, πάρα το κάπως ειδικό χαρακτήρα τους, οι νέοι 24v NF δείχνουν να πατάνε πολύ καλά στα πόδια τους και αν οι τωρινές ή οι μελλοντικές σας απαιτήσεις φλερτάρουν με μια από τις παραπάνω κατηγορίες, τα δεδομένα επίπεδα ποιότητας, το άριστο support, οι επιδόσεις αλλά και η απροβλημάτιστη διαθεσιμότητα στην αγορά κάνουν τους 24v NF μια άκρως δελεαστική πρόταση.
Test verdict: "Watercooling enthusiasts, engineer του υπογείου, 3D printers του Σαββατοκύριακου, ερασιτέχνες των ενισχυτών, εραστές των Arduino, πάσης φύσεως ninja των κολλητηριών και των prototypes, η Noctua είναι πλέον ανάμεσά στις cooling επιλογές για τα τερατουργήματά σας!" (Anastasios Komaris, hwbox.gr)
12.04.2016 // ModLabs.net
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NF-F12 industrialPPC-24V-2000 IP67 PWM Review

Что же мы имеем в итоге, протестировав вентиляторы industrialPPC 24V в контуре обычного ПК? По факту на 12 В, данные вентиляторы работают по аналогии с их премиальными собратьями. При работе от 12 В industrialPPC 24V могут развивать скорость на 40 % меньше заявленной. В отличие от industrialPPC 12V, герои сегодняшнего обзора имеют тихий подшипник, который на низких оборотах позволяет 24V вариациям быть очень тихими. Это именно то, чего не хватало предыдущей линейке.
Test verdict: "Так же стоит понимать, что industrialPPC 12V созданы для высокой производительности именно на 12 В. Производительность эта может быть излишней для тихого ПК и человек, который покупает их, должен знать для чего они ему нужны. Благодаря выходу industrialPPC 24V нам энтузиастам, можно найти чёрную Noctua, которая будет действительно тихой." (Svadkovskiy Igor Alexandrovich, ModLabs.net)
24.03.2016 // GameTechModding.com
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NF-F12 industrialPPC-24V-2000 IP67 PWM Review

Ritorniamo quest’oggi, dopo tanto tempo, con una recensione di alcune delle nuove ventole marcate Noctua. Marca che ormai è sempre più conosciuta nel mondo per i suoi ottimi prodotti che riguardano il raffreddamento del pc. Andremo a recensire le ventole Noctua NF-A14 24v iPPC-2000 IP67 24V e Noctua NF-F12 iPPC-2000 IP67 24V ed alcuni gommini Chromax.
Test verdict: "Ancora una volta Noctua ci fa rimanere stupiti dalla qualità dei loro prodotti davvero eccezionali. Il design non è molto appariscente e quindi senza led(come piace a me). Queste ventole sono consigliate a chi punta più sulla qualità del prodotto che ai colori.Invece, se volete applicare un po’ di colore alle ventole potete usare i gommini Noctua Chromax di diversi colori così vi potete sbizzarrire!" (Dodardo Raffaele, GameTechModding.com)
23.03.2016 // HardwareBBQ.com
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NF-F12 industrialPPC-24V-2000 IP67 PWM Review

- IP67 rating
- Excellent build quality
- Six years warranty period
- Tried and Tested SSO2 bearing
- 24v fans that can operate at 12v
- Varying choices within IndustrialPPC lineup
- Quiet operations at varying speeds used with 12v
Test verdict: "IndustrialPPC 24V IP67 ranges are very specifically made for specific uses.But I sense that a lot of people will be more interested in buying these to pair with larger capacity radiators used with a custom liquid cooling setup." (Roshan Ashraf Shaikh, HardwareBBQ.com)

Information Sheet (PDF)

Can industrialPPC fans be used with fan controllers and resistor cables (Low-Noise Adaptors)?

Noctua recommends not to use industrialPPC fans with common PC fan controllers, resistor cables (Low-Noise Adaptors) or other devices such as potentiometers that work by applying (variable) resistance rather than actually generating different voltages such as a laboratory power supply does. Due to the higher internal resistance of the industrialPPC fans’ three phase motor, applying additional resistance will cause the fans not to start (e.g. with Low-Noise Adaptors) or to have high starting speeds (e.g. with most common PC fan controllers). Please note that the industrialPPC fans feature starting voltages between 5.5V and 6V and can be run at these voltages on devices such as laboratory power supplies or mainboard fan controllers which actually generate lower voltages rather than applying resistance. Noctua thus recommends to use either PWM or voltage based mainboard fan control or laboratory/industrial power supplies for controlling the speed of industrialPPC fans.

4-pin PWM 3-pin
Mainboard fan control PWM based yes no
Mainboard fan control voltage based yes yes
Resistor cables (Low-Noise Adaptors) no no
Common PC fan controllers no
(high starting speed)
no
(high starting speed)
Laboratory/industrial power supplies yes yes

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.

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 use Low-Noise Adaptors for industrialPPC fans?

No, Low-Noise Adaptors are not compatible with Noctua’s industrialPPC series.

What pin configuration do Noctua 24V fans use?

The pin configuration of Noctua 24V fans is identical to 12V fans:

24v pin configuration

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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