heading NF-A14 industrialPPC-24V-3000 IP67 PWM SPECIFICATIONS VIDEOS REVIEWS SERVICE Product discontinued. Successor model: NF-A14 industrialPPC-24V-3000 Q100 IP67 PWM Conceived for industrial heavy duty applications that require enhanced cooling performance and advanced ingress protection, the NF-A14 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-A14 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-A14 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-A14 industrialPPC is an ideal choice for highly demanding applications that require superior flow rates and ultimate dependability. ✕ Details Award-winning NF-A14 design Having received more than 100 awards and recommendations from the international press, Noctua's NF-A14 has become a proven premium choice for 140mm cooling needs. Its renowned efficiency has convinced tens of thousands of customers all over the world. 3000rpm industrialPPC version Running twice as fast as the 1500rpm retail version, the NF-A14 industrialPPC-3000 provides extreme airflow and pressure performance. Combined with the industrialPPC series' robust polyamide construction and advanced protection features, this makes the fan ideal for challenging industrial applications. 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 While the industrialPPC 24V model has been designed with 24V industrial applications in mind, it runs at a maximum speed of around 1800rpm 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 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 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 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. Flow Acceleration Channels The NF-A14 impeller features suction side Flow Acceleration Channels. By speeding up the airflow at the crucial outer blade regions, this measure reduces suction side flow separation and thus leads to better efficiency and lower vortex noise. 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 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 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 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 The NF-A14 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 In order to guarantee the highest possible degree of manufacturing precision, minimum tolerance and excellent long-term stability, the NF-A14 industrialPPC sports a CNC milled bearing shell made entirely from brass. Custom-designed PWM IC with SCD Supporting fully automatic PWM speed control, the NF-A14 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 Noctua fans are renowned for their impeccable quality and outstanding longevity. Like all Noctua fans, the NF-A14 industrialPPC features an MTTF rating of more than 150.000 hours and comes with a full 6-year manufacturer’s warranty. 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! See all 63 reviews for this product See all 53 reviews for this product FAN Specification Size 140x140x25 mm Mounting hole spacing 124,5x124,5 mm Connector & pin-configuration 4-pin PWM Bearing SSO2 Blade geometry A-Series with Flow Acceleration Channels Frame technology AAO Material Fibre-glass reinforced polyamide Ingress protection IP67 Motor type Three-phase Rotational speed (+/- 10%) 3000 RPM Min. rotational speed (PWM, +/-20%) 800 RPM Rotational speed @ 12V (+/- 10%) 1800 RPM Airflow 269,3 m³/h Acoustical noise 41,3 dB(A) Static pressure 10,52 mm H₂O Max. input power 7,92 W Max. input current 0,33 A Operating voltage 24 V Voltage PWM signal 5 V MTTF > 150.000 h Scope of delivery Fan4 Fan Screws Warranty 6 years 07.01.2016 // PureOverclock.com NF-A14 industrialPPC-24V-3000 IP67 PWM Review At 24V, these fans are going to move a lot of air, but they’re going to be rather noisy as well. In a server room or industrial environment where cooling is all that really matters, this isn’t a concern at all. In fact, there isn’t hardly any 24V 140mm fans on the market to choose from. NOCTUA has a very intriguing option for those in need of this particular product. What really impressed me though, was just how well these fans worked in my own 12V tests. Airflow was favorable in comparison to other fans, but the radiator test on those 120mm industrialPPCs blew me away. Both fans pushed air through the fins with no effort at all and topped my charts as best radiator fans. This makes it very easy to choose between more performance or more silence. Which brings me to my final praise, and that’s the fact that all the fans were very silent. This is something that NOCTUA is known for, but the previous industrialPPCs were far from it. Overall, what impresses me the most is just how wide the range of application is for one fan. NOCTUA certainly did an excellent job. Test verdict: "These are top-of-the-line fans for just about any use." (Josh Jackson, PureOverclock.com) 25.12.2015 // Overclockers.com NF-A14 industrialPPC-24V-3000 IP67 PWM Review On my Megahalems testbed, the lower speed A14 iPPC was next to silent. Even the faster A14 iPPC was quiet. Even better, the Noctua NF-A14 iPPC-24V-3000 IP67 running at 12 volts seemed to hit a sweet spot between sound pressure level and cooling; after this, faster fans gave this system just a little bit more cooling at the cost of a lot more noise. Maybe all those little things Noctua have done on their frames do make a difference. Test verdict: "These 24-volt fans take the industrialPPC line down to lower speeds — all the way down to 1050 RPM maximum. And, as we have seen, the 3-phase motors are strong enough to maintain rotation against friction down to 123 RPM. In the first chart, we saw that these fans maintain a substantial airflow through rads. That makes them perfect radiator fans. Silent when not much is demanded, but strong yet quiet when they crank up at need." (Edward Hume, Overclockers.com) 20.01.2016 // CoolingTechnique.com NF-A14 industrialPPC-24V-3000 IP67 PWM Review Ottimi sono risultati nelle versioni testate i materiali, con telaio rinforzato in fibra di vetro, guaine a protezione dei cavi ben salde e decisamente ben realizzate; a queste si accosta una qualità costruttiva di primordine con profili palari allineati e privi di sbavature di stampaggio. Stonano unicamente le colorazioni degli antivibrazionali che risultano leggermente più scuri rispetto alle sorelle da 12v prodotte in fabbriche differenti. Sotto il piano prestazionale sorprende piacevolmente invece il basso punto di startup di soli 5v che permette di utilizzare queste iPPC anche in sistemi convenzionali fornendo una ventola sicuramente più parca e maggiormente regolabile rispetto alle versioni alimentate da una tensione di dodici volts. Il merito di questo va all'SSO2 modificato con tre fasi di alimentazione che permette un regime di funzionamento sicuramente più lineare a fronte di un consumo tutto sommato contenuto per una ventola rinforzata e protetta contro le infiltrazioni di acqua fino addirittura ad una immersione completa protratta per oltre 400 secondi a tensione nominale in acqua del rubinetto con sali e relativa conducibilità elettrica. Un risultato di tutto rispetto! Test verdict: "Con le nuove iPPC a 24v Noctua conferma la sua volontà nel volersi imporre anche in un settore dove ben pochi altri costruttori retail son riusciti ad entrare in maniera salda, quello dell'OEM per applicazioni industriali. Un compito come sappiamo decisamente non semplice ma che vede con le iPPC un'interessante proposta dall'azienda austriaca che riesce a presentare un prodotto protetto dalle infiltrazioni di polvere, acqua e con un pacchetto prestazionale solido capace di rispondere a praticamente tutte le richieste che si possono muovere nei confronti di una ventola assiale da 120 millimetri; siano esse in ambito consumer che OEM dove l'affidabilità deve essere posta in primo piano." (Damiano Villa, CoolingTechnique.com) 07.01.2016 // modding.fr NF-A14 industrialPPC-24V-3000 IP67 PWM Review Noctua profite de sa série IndustrialPPC-24V destinée aux applications industrielles, qui tournent généralement sous cette tension, pour palier au problème de volume sonore qui se posait avec sa gamme IndustrialPPC « classique ». Cette dernière est certes très efficace voire trop car pour de simple radiateur de ventirad ou d’AIO, nous n’avons pas besoin d’autant de souffle. Du coup, en alimentant cette nouvelle gamme en 12 V, nous réduisons quasiment de moitié la vitesse de rotation. Les valeurs recueillies sur le sonomètre et confirmer par notre oreille approuvent grandement cette décélération de la rotation des pales! Il est tout de même conseillé de ne pas descendre sous le minimum de tension requis (6 V), les tr/min chutant brusquement à ce niveau ce qui engendre une perte notable des performances de refroidissement. En 12 V nous retrouvons un niveau de performance identique à vitesse égale. Test verdict: "Nous avons alors le loisir d’avoir un NF-F12 ou un NF-A14 avec les avantages techniques de la gamme IndustrialPPC. On retrouve donc un renforcement sur plusieurs niveaux : la structure avec l’utilisation de Polyamide et fibre de verre (versus PBT), le moteur avec un tri-phasé (versus mono-phasé) et une norme qui répond aux exigences IP 67 mettant moteur et roulement à l’abri de la poussière et les rendant même étanche à l’eau." (Bertrand Curras, modding.fr) 28.05.2016 // Modders-Inc.com NF-A14 industrialPPC-24V-3000 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) 24.02.2016 // OCZone.org NF-A14 industrialPPC-24V-3000 IP67 PWM Review Ở mức điện thế 12V Fan quay quanh mức 1000RMP theo ghi nhận của BIOS máy tính , nhưng lượng gió và hiệu năng giải nhiệt mà chúng tôi cảm nhận được là ngang ngửa với những Fan PC khác khi quay ở tốc độ hơn 2000RPM . Điều thú vị nhất là ở mức 12v thì Fan hầu như không phát ra tiếng ồn , đây sẽ là ưu điểm nổi bật với những ai khó tính về độ ồn. Test verdict: "Nhìn chung Fan được thiết kế với chất lượng gia công tốt , chỉ số Airflow lớn rất hoàn toàn đáp ứng dư sức nhu cầu giải nhiệt cho PC , đặc biệt là chỉ số chống bụi và nước IP 67 . Đây sẽ là chiếc Fan mà dân chơi tản nhiệt nước săn tìm." (Ngọc Hồ Quang, OCZone.org) 04.02.2016 // PCElite.pl NF-A14 industrialPPC-24V-3000 IP67 PWM Review Przetestowane wentylatory z serii IndustrialPPC 24V to wentylatory z bardzo wysokiej półki. Świetnie schłodzą wnętrze obudowy czy maksymalnie rozgrzany radiator lub chłodnicę. Śmigła posiadają szereg ważnych cech takich jak odporność na kurz i wodę. Podsumowując jakość wykonania stoi na wysokim poziomie, są to zdecydowanie produkty z klasy Premium. Test verdict: "Reasumując wentylatory polecić można wyłącznie użytkownikom poszukujących maksymalnej wydajności nie oglądającym się na wysoką cenę." (Arkadiusz Byś, PCElite.pl) 25.01.2016 // Conseil Config NF-A14 industrialPPC-24V-3000 IP67 PWM Review Après les Industrial PPC "classiques" en 12V testés ici Noctua revient avec des modèles qui fonctionnent en 24V, pour les machines qui ont besoin de ventilateurs fonctionnant à cette tension, tous sont équipés de la certification IP67 garantissant un fonctionnement dans des conditions extrêmes. Malgré leur tension nominale de 24V ils fonctionnent très bien dans un PC de bureau capable de les alimenter en 12V, la seule conséquence est la baisse des RPM passant à 1050 RPM pour les modèles 2000 RPM et 1700 RPM pour les modèles 3000 RPM. Une fois dans un PC de bureau ils se transforment en excellents ventilateurs à tout faire, rivalisant sans le moindre problème avec leurs confrères, les 2000 RPM sont inaudible en 5V et très discret en 12V, les 3000 RPM sont très silencieux en 5V mais par contre se font clairement entendre en 12V, il y en a pour tous les goûts. Test verdict: "La qualité de fabrication est tout simplement excellente, les ventilateurs sont solides donnent l'impression qu'ils sont faits pour durer, rien qui ne change des produits que l'on trouve d'habitude chez Noctua." (Christian Marchini, Conseil Config) 13.01.2016 // PC Ekspert NF-A14 industrialPPC-24V-3000 IP67 PWM Review Iz rezultata testova možemo zaključiti kako je najisplativija nabavka A14-2000 modela koji donosi najbolji omjer buke i performansi, naravno ako u kućištu ili na hladnjaku imate mjesta za njega. U suprotnom će F12-2000 morati biti dovoljan. F12-3000 je malo prebučan, baš kao A14-3000 koji ne donosi prednost u performansama nad A15. U 24 V režimu rada ih nismo mogli isprobati no vjerujemo kako su im performanse vrhunske i kako tjeraju velike količine zraka, jer su već i na 12 V moćni. Buka je naravno ovdje sporedan faktor, pogotovo kada rade u 24 V režimu, pa se na to nećemo ni osvrtati, no u PWM režimu i pri nižim opterećenjima svi oni mogu biti i vrlo tihi (do 1200 – 1300 okretaja). Test verdict: "industrialPPC ventilatori su vrlo preporučljiva nabavka za sve koji traže pouzdanost u radu i visoke performanse. Kvalitetno su napravljeni, s dodanom vrijednošću zaštite od prašine, šest godišnjim jamstvom i svim ostalim pozitivnim karakteristikama dizajna i konstrukcije." (Krešimir Matanović, PC Ekspert) 12.01.2016 // HardZone.es NF-A14 industrialPPC-24V-3000 IP67 PWM Review Éstos Industrial PPC son seguramente los más “todoterreno”, gracias a su protección IP67 y a que son capaces de funcionar tanto a 12 como a 24 voltios de tensión. Además, cuentan con todas las tecnologías que Noctua lleva años desarrollando, entregando un rendimiento máximo en todos los ámbitos y reduciendo al mínimo posible el ruido. Especialmente los modelos NF-F12 están indicados para todo tipo de máquinas, ya sean industriales o caseras, ya que presentan bajo nuestro punto de vista el mejor balance de rendimiento y ruido posible. Test verdict: "Es bastante probable que no me equivoque al decir que Noctua tiene los mejores ventiladores del mundo en su catálogo." (Rodrigo Alonso, HardZone.es) See all 63 reviews for this product INSTRUCTIONS AND INFORMATION SHEETS (PDF) FAQs Information Sheet (PDF) FAQs Can industrialPPC fans be used with fan controllers and resistor cables (Low-Noise Adaptors)? How much torque should be used for fan screws? Can I use Noctua fans in my system from Acer, Apple, Dell, HP, Lenovo or other major brands? How can I check if my 4-pin fan header supports PWM? Can I use Low-Noise Adaptors with y-cables / multiple fans? How should I clean my Noctua fan? Can I run 4-pin PWM fans on 3-pin fan headers? Can I disassemble my fan for cleaning (or other purposes, e.g. painting)? Which Noctua 140mm fans are optimised for airflow, which are optimised for static pressure? Are industrialPPC fans as quiet as other Noctua fans? What pin configuration do Noctua 24V fans use? Can I use Low-Noise Adaptors for industrialPPC fans? My fan doesn’t spin when I start up the PC - is it faulty? Which Noctua fan or CPU cooler should I buy? How to choose the right model? 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 Mainboard fan control voltage based Resistor cables (Low-Noise Adaptors) Common PC fan controllers (high starting speed) (high starting speed) Laboratory/industrial power supplies How much torque should be used for fan screws? Please use 0.6Nm to tighten fan screws. Make sure not to overtighten the screws as this may damage the fan frame. 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. 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: 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 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! 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 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). 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. Which Noctua 140mm fans are optimised for airflow, which are optimised for static pressure? Noctua only distinguishes between airflow optimised and pressure optimised fans in its 120mm range (see this page for details). For 140mm fans, there is no such distinction: Both the NF-A14 and the NF-P14 redux models are true all-rounders that provide outstanding levels of airflow and static pressure. Either of them works excellent both for case cooling and for use on radiators and heatsinks. Are industrialPPC fans as quiet as other Noctua fans? The industrialPPC models are high-speed fans for industrial heavy duty applications that require enhanced cooling performance. While their outstanding aerodynamic efficiency allows keeping noise levels moderate as against comparable high-speed fans, it is inevitable that the faster industrialPPC models are louder than the slower standard models when compared at their respective maximum speeds. For example, the standard NF-F12 PWM emits a noise level of 22.6dB(A) at its maximum speed of 1500rpm whereas the NF-F12 industrialPPC-2000 PWM emits a noise level of 29.7dB(A) at its maximum speed of 2000rpm. When both fans are adjusted to the same speed via PWM or voltage control though, the noise level is similar (except for the fact that the industrialPPC fans' high-speed motors can be slightly audible at close range when running at speeds below around 1000rpm). If you want to reduce the noise levels of industrialPPC fans, we therefore recommend reducing the speed via motherboard fan control or our NA-FC1 fan controller. If you don’t need the extended performance headroom of the high-speed industrialPPC fans, we recommend using our standard, chromax or redux line models as these provide excellent quietness of operation without speed reduction. What pin configuration do Noctua 24V fans use? The pin configuration of Noctua 24V fans is identical to 12V fans: Can I use Low-Noise Adaptors for industrialPPC fans? No, Low-Noise Adaptors are not compatible with Noctua’s industrialPPC series. 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. 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!