heading

Noctua's DX line of coolers has become a default choice in high performance quiet cooling solutions for Intel Xeon CPUs. The latest i4 revision supports LGA2011 (both Square ILM and Narrow ILM), LGA1356 and LGA1366 based Xeon platforms and the 9cm model NH-U9DX i4 comes equipped with two of Noctua’s award-winning NF-B9 premium fans with PWM for automatic speed control. Standing 125mm tall, the NH-U9DX i4 combines outstanding quiet cooling efficiency with full 4U compatibility. Fitted with the professional SecuFirm2™ mounting system and bundled with Noctua's industrial-grade NT-H1 thermal compound, the NH-U9DX i4 forms a complete premium quality package for quietly cooling Xeon based workstations and servers.
Details
Award-winning NH-U series

Award-winning NH-U series

The NH-U9DX i4 is based on the latest version of Noctua's award-winning NH-U9 coolers. First introduced in 2005, the NH-U series has become a standard choice for premium quality quiet CPU coolers and won more than 400 awards and recommendations from leading international hardware websites and magazines.
4U Compatibility

4U Compatibility

Sporting four heatpipes, a surface area of more than 3800cm² and two premium grade 92mm fans, the NH-U9DX i4 provides a significant upgrade in quiet cooling performance compared to common 2U solutions. At the same time, its 125mm height makes it fully compatible with standard 4U cases.
2x NF-B9 92mm Premium Fan

2x NF-B9 92mm Premium Fan

The award-winning NF-B9 92mm premium fan features Noctua's renowned SSO bearing as well as advanced aerodynamic optimisations such as Bevelled Blade Tips and Vortex-Control Notches. In order to achieve its superb quiet cooling capability, the NH-U9DX i4 comes equipped with two NF-B9 fans in a push/pull setup.
PWM support and Low-Noise Adaptor

PWM support and Low-Noise Adaptor

The NF-B9 92mm fans supplied with the NH-U9DX i4 support PWM for convenient automatic speed control through the mainboard. In addition, the maximum fan speed can be reduced from 1600 to 1300rpm using the supplied Low-Noise Adaptors for even quieter operation.
SecuFirm2™ mounting system

SecuFirm2™ mounting system

Noctua's SecuFirm2™ mounting systems have become synonymous with quality, safety and ease of use. Supporting Intel's LGA2011 (both Square and Narrow ILM), LGA2066, LGA1356 and LGA1366 Xeon platforms, the SecuFirm2™ mounting included with the NH-U9DX i4 guarantees perfect contact pressure and maximum convenience on all sockets.
NT-H1 thermal compound

NT-H1 thermal compound

Having received more than 100 awards and recommendations from hardware journalists around the world, Noctua's NT-H1 is a proven professional grade TIM solution that provides minimum thermal resistance, excellent ease of use and outstanding reliability.
6-year manufacturer’s warranty

6-year manufacturer’s warranty

Noctua products are renowned for their impeccable quality and outstanding longevity. Like all Noctua fans, the supplied NF-B9 models feature an MTTF rating of more than 150.000 hours and the entire NH-U9DX i4 package comes with a full 6-year manufacturer's warranty.
NH-U9DX i4
Cooler Specification
Intel LGA2066, LGA2011-0 & LGA2011-3 (Square ILM & Narrow ILM), LGA1356, LGA1366 (with Xeon backplate)
Height (without fan)
125 mm
Width (without fan)
95 mm
Depth (without fan)
71 mm
Height (with fan)
125 mm
Width (with fan)
95 mm
Depth (with fan)
95/120* mm
Weight (without fan)
460 g
Weight (with fan/s)
550/640* g
Material
Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating
Fan compatibility
92x92x25
Scope of delivery
  • 2x NF-B9 PWM premium fan
  • Low-Noise Adaptor (L.N.A.)
  • NT-H1 high-grade thermal compound
  • SecuFirm2™ Mounting Kit
Warranty
6 Years
FAN Specification
Bearing
Max. Rotational Speed (+/- 10%)
1600 RPM
Max. Rotational Speed with L.N.A. (+/- 10%)
1300 RPM
Min. Rotational Speed (PWM, +/-20%)
300 RPM
Max. Acoustical Noise
17,6 dB(A)
Max. Acoustical Noise with L.N.A.
13,1 dB(A)
Input Power
0,96 W
Voltage Range
12 V
MTTF
> 150.000 h
NH-U9DX i4
10.07.2017 // PC Ekspert
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NH-U9DX i4 Review

Veliki NF-A20 i u PWM i U FLX verziji košta oko 33 € što je korektna cijena za veličinu ventilatora, svu opremu koju donosi i na kraju krajeva vrlo dobre performanse uz ne previsoku buku. Kvaliteta izrade je visoka, materijali odlični a tehnologije jamče dugovječnost – kao i šest godišnje jamstvo uostalom. NF-A12x15 su po cijeni od 24 € pogodni za ugradnju u skučenija HTPC kućišta i na manje hladnjake, a obavezno ih se treba malo usporiti jer su na visokim okretajima čujniji. “Propuh” koji stvaraju je vrlo dobar i na nižim okretajima. A4x20 je u svim verzijama oko 20 €. Visoka je to cijena za 40-milimetarske ventilatore, no zbog kvalitete izrade, jamstva i ponajprije velike kompatibilnosti i mogućnosti prilagodbe isplati se platiti i tako visoki iznos. Ventilatori jesu bučniji pri visokim okretajima, no za kakav komad mrežne opreme koji je u ormaru to i nije bitno, a koncentrirana je zračna struja visoka i moćna. NA-SAV3 i SAV4 su po 11.50 € za što kupac dobiva kvalitetu, kompatibilnost s velikim brojem ventilatora i 16 komada nosača za po četiri ventilatora. NA-FC1 je svestran i kvalitetan kontroler za do tri ventilatora koji je moguće napajati direktno iz SATA Power konektora, pa može kontrolirati i jače ventilatore, no nije jeftin – 15 €. I za kraj, NA-SAC5 adapter koji može biti iznimno koristan za jače ventilatore koji se direktno napajaju iz SATA Power konektora i tako ne opterećuju ploču. Negativna je jedino cijena od oko 8 €.
Test verdict: "Noctua koristi svoju veliku ekspertizu u izradi sve boljih ventilatora iz godine u godinu. Novosti za ovu su tri varijante koje smo u ovom članku pokazali i svaka je od njih posebna, a to uključuje i sve izvedenice pojedinih ventilatora. [...] Svi Noctuini proizvodi su kao uvijek korisni i zaslužuju visoke preporuke, a jedino što ima zapravo možemo zamjeriti je nešto viša cijena za naše hrvatske (prazne) džepove." (Krešimir Matanović, PC Ekspert)
17.10.2016 // ITNdaily.ru
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NH-U9DX i4 Review

Прежде чем мчаться в магазин за дорогостоящим и массивным Noctua NH-D15 для охлаждения Intel Core i7, повнимательнее присмотритесь к Noctua NH-U9DX i4. Почти наверняка для Socket LGA 2011 он окажется не худшим и даже выгодным вариантом.
Test verdict: "Ориентированность продукта на профессиональный рынок дает свои положительные плоды (простота установки и относительная доступность на фоне схожих решений), и грех ими не воспользоваться в производительном десктопе. Рекомендуем." (Евгений Никифоров, ITNdaily.ru)
26.09.2016 // NewEsc.com
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NH-U9DX i4 Review

Pensando também no caso desta motherboard X99 usada com Narrow-ILM, é uma boa solução para substituir o cooler que a mesma traz de origem (o Dynatron R24), que é bastante ruidoso quando sobe acima de valores médios de velocidade, que com uma fan de 60mm chega às 7.000/7.500 RPM!
Test verdict: "O cooler é uma excelente solução para qualquer sistema que esteja algo limitado na altura dado ter apenas 125mm, e com excelente poder de dissipação com as suas duas fans." (Filipe Teixeira, NewEsc.com)
22.08.2016 // Turkchip.com
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NH-U9DX i4 Review

Noctua işlemci soğutucuları ısı değerlerine göz attığımızda boyutlarına göre performans gösterdiklerini görüyoruz. Özellikle Noctua U12DX i4 testleri liderlikle bitirirken, D9DX ise testleri 3.üncü sırada bitirdi. Özellikle Noctua U12DX i4 işlemci soğutucusu işlemcimizi overclock yaptığımızda daha iyi performans gösterirken Thermalright Macho Zero ile başa baş sonuçlara imza atıyor.
Test verdict: "Noctua NH-U12DX i4 ve NH-D9DX i4 3U işlemci soğutucuları fiyat/performans olarak oldukça başarılı. Sunduğu bir çok özelliği, zengin kutu içeriği ile sunucu/workstationlara yeni bir çözüm getirirken Turkchip Golden Award ödülünü de hak ediyor." (Murat Yildirim, Turkchip.com)
05.02.2016 // PC Ekspert
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NH-U9DX i4 Review

Kod overclockinga nismo koristili low noise adaptere nego smo mjerenja samo izvršili pri punim brzinama ventilatora. Rezultat nije nimalo loš kada je u pitanju veći U12DX hladnjak koji očito bolje funkcionira pod većim opterećenjem jer je ovdje za 3°C bolji od i32. U9DX s oba ventilatora i u punoj brzini drži procesor na iznimno vrućih maksimalno zabilježenih 95°C. Prosjek maksimalnih temperatura za U12DX iznosi 83.13°C, za U9DX 87.1°C, za i32 86.5°C i za D15 80.33°C. Maksimalna potrošnja sistema je iznosila 275 W.
Test verdict: "Noctua već neko vrijeme vješto koristi svoje umijeće i postojeće desktop modele kako bi proširili tržište i na workstation/server segment. Dokaz tome su i ova dva modela, koji su poznate Noctuine premium kvalitete, jednostavnog načina montaže ali i dobrih performansi." (Krešimir Matanović, PC Ekspert)
16.06.2015 // Tom's Hardware
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NH-U9DX i4 Review

Dynatron uses thick fans with heavy duty motors to produce high air pressure through narrowly spaced fins, yet even its powerful 80mm cooler can’t stand up to the cooling capacity of Noctua’s 92mm NH-U9DX i4. Dynatron’s fans also override motherboard fan settings, making it impossible to hold a moderate fan speed if the CPU is even a little warm. [...] Decibels are a logarithmic scale, so an increase of ten decibels has twice the sound pressure level. That means the R27 is nearly four times as noisy as the NH-U9DX i4, and the R24 is nearly twice as noisy as the R27.
Test verdict: "The NH-U9DX i4 is the clear winner in value, noise and cooling power" (Thomas Soderstrom, Tom's Hardware)
03.12.2014 // Phoronix.com
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NH-U9DX i4 Review

The Noctua heatsink was allowing the eight-core CPU to operate around eight degrees cooler than the Arctic Alpine 20 Plus heatsink fan that I was using previously on this system. This Noctua heatsink is also very quiet while offering great performance.
Test verdict: "I've now been using this heatsink for over a month and it's been working out great for my range of LGA-2011 v3 CPUs." (Michael Larabel, Phoronix.com)
02.06.2014 // GreenTechReviews.ru
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NH-U9DX i4 Review

Как видно из тестирования, Noctua NH-U9DX i4 продемонстрировал изумительные результаты при чрезвычайно низком уровне шума! Качество продукта, эффективность охлаждения, уровень шума — всё по высшему разряду. Как и цена. Но NH-U9DX i4 определённо стоит своих денег!
Test verdict: "Если вы ищете замену своим штатным кулерам в рабочей станции, то мы смело можем рекомендовать Noctua NH-U9DX i4 к покупке!" (Владимир Солонин, GreenTechReviews.ru)
18.10.2013 // HD Technology
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NH-U9DX i4 Review

Oggi vi mostreremo il nuovo prodotto di casa Noctua, azienda che non ha bisogno di essere presentata, nota a tutto il mondo per i propri prodotti affidabili e di fascia alta. Annunciati pochi mesi fa, l’azienda ha rilasciato un nuovo dissipatore che prende il nome di , Noctua NH-U9DX i4, prodotto destinato a raffreddare i bollenti spiriti delle soluzioni LGA2011/LGA1356 e LGA1366.
Test verdict: "Non riuscendo a provare il modello precedente non possiamo dirvi se o meno il prodotto è migliorato, ma dalla successione di tutti i prodotti Noctua il miglioramento si è sempre notato. NH U9DX i4 si è mostrato veramente un processore degno di nota. La potenza di raffreddamento è impressionante cosi come il livello di rumore pressoché nullo." (Victor Italiano, HD Technology)
04.09.2013 // Turkchip.com
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NH-U9DX i4 Review

Noctua NH-U9DX i4 performans olarak Corsair H110 sıvı soğutmalı soğutucunun biraz gerisinde kalırken abisi D14 kadar performans gösterdi.
Test verdict: "Noctua NH-U9DX i4 kullanılan malzemelerin kalitesi, yüksek soğutma performansı, zengin kutu içeriğinin yanısıra sessiz çalışması ile Turkchip Silver Award ödülünü hak eden başarılı bir ürün." (Murat Yildirim, Turkchip.com)

Installation Manual (PDF)

Information Sheet (PDF)

FAQs

Is the cooler compatible with all LGA1366 mainboards?

Does the mounting-system of the NH-U12DX i4/NH-D9DX i4 3U/NH-U9DX i4 support LGA2011 based Xeon platforms with Narrow ILM?

Can Noctua coolers be installed on LGA2011 Narrow ILM platforms?

Is the cooler compatible with the LGA2011-3 socket?

Is it a problem that the CPU heatspreader is not covered completely by the heatsinkbase on LGA2011-3?

Which sockets are supported or can be supported using upgrade kits?

My unlocked Intel CPU is running too hot although my heatsink supports the specified TDP, what's the problem?

How should I clean my Noctua cooler?

What Thermal Design Power (TDP) is this cooler recommended for and how much Watt (W) of heat can it dissipate?

My case supports CPU coolers of up to XXXmm height, which model should I choose?

I have difficulties installing the cooler, can you help?

Can I keep using the backplate / mounting system of my previous Noctua cooler for my new one?

How much torque should be applied when tightening the screws of a Noctua CPU cooler?

How can I determine if the motherboard’s UEFI BIOS is overclocking my processor by default and deactivate this automatic overclocking?

Which Noctua CPU coolers are compatible with Intel LGA2066?

Can I install a Noctua cooler in my system from Acer, Dell, HP or Lenovo?

Which Noctua CPU coolers are compatible with AMD AM4 (Ryzen)?

Can I upgrade my existing Noctua cooler to socket TR4 or SP3?

My Noctua PWM fan starts to spin when the PC boots but then stops, what is wrong?

My Noctua PWM fan runs at a much higher minimum speed than advertised, what is wrong?

I'm experiencing fan speed issues with my motherboard from Supermicro, what can I do?

Which Noctua fan or CPU cooler should I buy? How to choose the right model?

Is the cooler compatible with all LGA1366 mainboards?

The DX models (NH-U12DX i4, NH-U9DX i4, NH-U12DX 1366, NH-U9DX 1366) can only be used on mainboards that have a backplate with screw threads for CPU cooler installation (such as the Intel reference backplate for Xeon 5500). The cooler is thus incompatible with Xeon 3500 and Core i7 mainboards that don’t have such a backplate. Please choose our normal retail models with LGA1366 support (or NM-I3 kit) for these mainboards.

1366 compatibility

Does the mounting-system of the NH-U12DX i4/NH-D9DX i4 3U/NH-U9DX i4 support LGA2011 based Xeon platforms with Narrow ILM?

There are two different types of ILM (Independent Loading Mechanism) for Intel’s LGA2011 based Xeon CPUs: Square ILM with 80x80mm hole spacing and Narrow ILM with 56x94mm hole spacing. The mounting system of the NH-U12DX i4/NH-D9DX i4 3U/NH-U9DX i4 is fully compatible with both types:

Xeon Compatibility

Can Noctua coolers be installed on LGA2011 Narrow ILM platforms?

The NH-U12DX i4 and NH-U9DX i4 include mounting hardware for LGA2011 Narrow ILM. Other models are mechanically incompatible with the Narrow ILM mounting system and can thus not be used on this platform.

Is the cooler compatible with the LGA2011-3 socket?

Yes. Due to the heatsink mounting mechanism being identical on LGA2011-0 and 2011-3, the cooler supports both types of LGA2011-3.

Is it a problem that the CPU heatspreader is not covered completely by the heatsinkbase on LGA2011-3?

No. Depending on the orientation of the cooler, 1-2mm at the outer edge of the heatspreader may not be covered by the heatsink base. As the heat is concentrated at the center of the CPU and the outermost parts are irrelevant for heat-transfer, this is no problem at all.

Which sockets are supported or can be supported using upgrade kits?

Please refer to our socket compatibility chart.

My unlocked Intel CPU is running too hot although my heatsink supports the specified TDP, what's the problem?

Intel's unlocked CPUs (K, X and C suffix) can dissipate more heat than indicated by the TDP specification if
  1. the TDP limits are extended or disabled in the motherboards' BIOS.
  2. the motherboard applies automatic overclocking by default, e.g. by raising the supply voltage of the CPU and using higher Turbo-Mode multipliers.
  3. some software creates untypical loads, e.g. Prime95 with AVX2 support and a) and/or b) apply.

This can lead to temperature issues, especially when using smaller coolers or compact cases.

The actual power draw of the processor can be monitored with software provided by the motherboard vendor or with 3rd party tools like HWInfo or HWMonitor.

If you encounter temperature issues (>90°C) and notice a higher than specified power draw, please ensure that no automatic overclocking is applied and limit the TDP to the specified value by choosing appropriate BIOS settings.

For Kaby Lake CPUs, it may also help to lower the CPU clock speed for applications that heavily use the AVX instruction set, which can lead to higher loads and power draw. This option is usually referred to as “AVX offset” and makes it possible to lower the multiplier specifically for AVX based applications without reducing performance when using other instruction sets. Depending on the quality of the CPU and the programs being used, a reduction of 2-3 steps usually gives very good results.

Please contact your motherboard vendor for details if you have trouble finding the appropriate settings in the BIOS.

All our TDP recommendations are based on thorough testing with the default values specified by Intel using popular applications such as Asus Realbench and prime95. Please note, however, that prime95 creates a particularly high load that goes beyond typical application scenarios and this leads to elevated temperatures. We thus recommend using other programs such as Realbench for checking the stability and temperatures of the CPU in realistic scenarios.

How should I clean my Noctua cooler?

Dust: Fans and heatsinks inside computer cases tend to accumulate dust over longer periods of usage. In order to maintain maximum performance, please clean your fan and heatsink regularly. For cleaning, please first remove the fan from the heatsink and clean it 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. Please also 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. Before reinstalling the fan, clean the heatsink itself with a duster or vacuum cleaner. Do not use water to clean the cooler. Finally put the fan back on and connect it to your motherboard fan header or fan controller.
Thermal paste residues: Whenever you take off the heatsink from the CPU, we recommend to clean the CPU as well as the base of the cooler before re-applying thermal paste and re-installing the cooler. You can either just wipe the base and the CPU clean with a dry, lint-free tissue or, for more thorough cleaning, use a lint-free tissue moistened with either a mild solution of washing-up liquid or isopropyl alcohol. Do not put the cooler or CPU under running water. Note that both the base of the heatsink and the CPU should be dry, free from residues of thermal compound and free from grease before re-applying thermal paste and re-installing the cooler.

What Thermal Design Power (TDP) is this cooler recommended for and how much Watt (W) of heat can it dissipate?

Please refer to our TDP guide for information on maximum recommended TDP and heat dissipation.

My case supports CPU coolers of up to XXXmm height, which model should I choose?

Please refer to our TDP guide in order to select the cooler that offers the best cooling performance at a given height.

I have difficulties installing the cooler, can you help?

Please refer to the installation manual and our video installation guides for detailed instructions on how to install the cooler.

Can I keep using the backplate / mounting system of my previous Noctua cooler for my new one?

Most Noctua SecuFirm™ mounting parts are cross-compatible, so if you’re replacing one Noctua cooler with another, it is usually possible to keep the original backplate and/or mounting system in place in order to re-use it for the new cooler. If you had your previous Noctua cooler installed on an Intel LGA115x (LGA1156, LGA1155, LGA1151, LGA1150), LGA2011 (LGA2011-0, LGA2011-3) or LGA1366 system and replace it with an NH-U14S, NH-U12S or NH-U9S, you only need to replace the original mounting bars with the NM-IMB3 ones supplied with the new cooler. For all other models, you can keep the entire mounting system in place on the aforementioned Intel sockets. On AMD AM2, AM2+, AM3, AM3+, FM1, FM2, FM2+, you only need to replace the original mounting bars with the ones supplied with the new cooler.

How much torque should be applied when tightening the screws of a Noctua CPU cooler?

All screws should be tightened gently until they stop without using excessive force. Please do not exceed the following values for maximum tightening torque:
Screw typeMax. torque
NM-SSC1 screws for fixing the fastening brackets to the base of the heatsink0.5 Nm
NM-ITS1 thumb screws for fixing Intel mounting bars0.5 Nm
NM-ALS1 screws for fixing AMD mounting bars0.6 Nm
Spring-loaded screws for fixing the heatsink to the mounting bars0.6 Nm

How can I determine if the motherboard’s UEFI BIOS is overclocking my processor by default and deactivate this automatic overclocking?

Most motherboard vendors allow their overclocking-enabled products (e.g. those with Intels X- or Z-series chipsets) to run the processor at increased clock speeds by default, without requiring any user action at all. Since TDP (Thermal Design Power) limits are usually also disabled by default, this leads to the CPU exceeding the rated TDP to a varying degree, depending on the used applications and their workloads. Due to the increased heat output of the CPU, you may see higher CPU temperatures than expected.

In order to find out if your motherboard is overclocking your processor by default, please enter the UEFI BIOS and select the “advanced” or “overclocking” menu. There you should be able to find options such as “MultiCore Enhancement” (options: enabled/disabled), “CPU Ratio Apply Mode” (options: all/per core) or similar. To disable the automatic overclocking, adjust the settings either to “disabled” or “per core” and make sure that the individual multipliers match the original specifications.

In doubt, please contact your motherboard vendor for detailed instructions on how to disable this feature.

Which Noctua CPU coolers are compatible with Intel LGA2066?

Due to the heatsink mounting mechanism being identical on LGA2011 and LGA2066, Noctua’s SecuFirm2™ mounting systems for LGA2011 also support Intel’s upcoming ‘Basin Falls’ X299 HEDT (High End Desktop) platform for ‘Skylake-X’ and ‘Kaby Lake-X’ processors. Most current Noctua coolers already include SecuFirm2™ mounting systems for LGA2011 and can thus be used on LGA2066 motherboards without any upgrades or modifications.

The following models include a mounting-kit for socket LGA2011/2066 and are thus compatible out of the box:

NH-C14S
NH-D14 SE2011
NH-D15
NH-D15S
NH-D9L
NH-L12
NH-L9x65
NH-U12S
NH-U12DX i4
NH-U14S
NH-U9DX i4
NH-U9S

The following models can be made compatible with the LGA2011/LGA2066 sockets free of charge using the NM-I2011 upgrade-kit:

NH-C12P
NH-C12P SE14
NH-C14
NH-D14
NH-D15 SE-AM4
NH-U12S SE-AM4
NH-L9x65 SE-AM4
NH-U12
NH-U12F
NH-U12P
NH-U12P SE1366
NH-U12P SE2
NH-U9
NH-U9B
NH-U9B SE2
NH-U9F

The following models can be made compatible with the LGA2011/LGA2066 sockets using the NM-I2011 upgrade-kit but are not eligible for Noctua‘s free mounting offer, so users have to purchase the kit at local resellers:

NH-U12DO (Note that the A3 version is not compatible!)
NH-U12DX
NH-U12DX 1366
NH-U9DX 1366
NH-U9DO (Note that the A3 version is not compatible!)

The following models are not compatible with the LGA2011/LGA2066 sockets and can not be upgraded:

NH-L9a
NH-L9i
NH-U12DO A3
NH-U9DO A3

Can I install a Noctua cooler in my system from Acer, Dell, HP or Lenovo?

Systems from Acer, Apple, Dell, HP, Lenovo or other major brands often use motherboards which differ slightly from the specifications issued by Intel and AMD. While those changes are usually subtle, they can lead to compatibility issues with coolers that where built to comply with these specifications.

Even in case the cooler is mechanically compatible and can be installed, other issues can occur, e.g. proprietary fan connectors, BIOS errors due to a low fan speed, shutdowns, etc. Some of these problems can be avoided with some technical knowledge, but especially BIOS related issues can often not be resolved.

Due to the large number of possible issues that cannot be resolved with different mounting parts alone, Noctua does not officially support systems from Acer, Apple, Dell, HP, Lenovo or other major brands.

Which Noctua CPU coolers are compatible with AMD AM4 (Ryzen)?

The following models include a mounting-kit for socket AM4 and are thus compatible out of the box:

NH-D15 SE-AM4
NH-U12S SE-AM4
NH-L12S
NH-L9x65 SE-AM4
NH-L9a-AM4

The following models can be made compatible with the AM4 socket free of charge using the NM-AM4 upgrade-kit:

NH-C12P
NH-C12P SE14
NH-C14
NH-C14S
NH-D14
NH-D14 SE2011
NH-D15
NH-D15S
NH-D9L
NH-L12
NH-L9x65
NH-U12
NH-U12F
NH-U12P
NH-U12P SE1366
NH-U12P SE2
NH-U9
NH-U9B
NH-U9B SE2
NH-U9F

The following models can be made compatible with the AM4 socket free of charge using the NM-AM4-UxS upgrade-kit:

NH-U14S
NH-U12S
NH-U9S

The following models can be made compatible with the AM4 socket free of charge using the NM-AM4-L9aL9i upgrade-kit:

NH-L9a
NH-L9i

The following models can be made compatible with the AM4 socket using the NM-AM4 upgrade-kit but are not eligible for Noctua‘s free mounting offer, so users have to purchase the kit at local resellers:

NH-U12DO (Note that the A3 version is not compatible!)
NH-U12DX
NH-U12DX 1366
NH-U12DX i4
NH-U9DX i4
NH-U9DX 1366
NH-U9DO (Note that the A3 version is not compatible!)

The following models are not compatible with the AM4 socket and can not be upgraded:

NH-U12DO A3
NH-U9 DO A3

Can I upgrade my existing Noctua cooler to socket TR4 or SP3?

Unfortunately, it is not possible to upgrade existing Noctua heatsinks to support the AMD TR4 and SP3 sockets for Ryzen Threadripper (X399) and Epyc CPUs. TR4/SP3 CPUs have much bigger heatspreaders (as compared to e.g. LGA2066 or AM4 processors) and the contact surfaces of standard Noctua heatsinks would cover only about half of these heatspreaders, which would result in insufficient cooling performance. On top of that, the heatpipes of bigger cooler models like the NH-D15 or NH-D15S would completely block the RAM slots on many TR4/SP3 motherboards. For this reason, Noctua has introduced the new NH-U14S TR4-SP3, NH-U12S TR4-SP3 and NH-U9 TR4-SP3 cooler models that feature bigger contact surfaces and have been tailored to fit TR4 and SP3 systems. Please choose these models for AMD Ryzen Threadripper and Epyc systems.

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.

I'm experiencing fan speed issues with my motherboard from Supermicro, what can I do?

The BIOS of many motherboard models from Supermicro expects a certain minimum fan speed (usually 700rpm), which is higher than the minimum fan speed that can be achieved with Noctua's PWM fan models. The BIOS may interpret the low minimum RPM of Noctua fans as a fan error and thus try to run the fan at 100% for a short period before going back to automatic control.. This can result in oscillating fan speeds and fan speed warnings in the BIOS or the fan management console.

Unfortunately there is usually no option to set a lower minimum value that would suit the low minimum speed of Noctua PWM fans.The issue can thus only be resolved by either disabling automatic fan speed control in BIOS, which will cause the fans to run at a constant speed, or by requesting a modified BIOS file from Supermicro, which takes the minimum fan speed of Noctua fans into account (charges might apply).

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.

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