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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), LGA1356 and LGA1366 Xeon platforms, the SecuFirm2™ mounting included with the NH-U9DX i4 guarantees perfect contact pressure and maximum convenience on all sockets.
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 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)
Voltage Range
12 V
MTTF
> 150.000 h
NH-U9DX i4
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)
30.05.2013 // mod-your-case.de
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NH-U9DX i4 Review

Auch wenn die vom neuen NH-U9DX i4 erbrachte Kühlleistung trotz der zwei verbauten Lüfter nicht an die des kürzlich getesteten, neuen NH-U12DX i4 herankommt, so hat auch der NH-U9DX i4 seine Vorzüge. Wo der NH-U12DX i4 sein Einsatzgebiet eher noch in einer Workstation sieht, richtet sich der NH-U9DX i4 eher an lärmbewusste Betreiber von Servern in 4HE-Gehäusen, welche dennoch nicht auf eine ausreichende Kühlleistung verzichten wollen. In diesen findet der NH-U9DX i4 problemlos platz, auch wenn ein Mainboard mit zwei oder vier Prozessoren zum Einsatz kommt. [...] Die Kühlleistung konnte im Vergleich zu dem von Intel angebotenen Kühler ebenso wie der Geräuschpegel überzeugen. Die Montage ist schnell und zudem sicher zu bewerkstelligen. Der rund 60€ teure NH-U9DX i4 kann zudem durch eine sehr gute Verarbeitung glänzen.
Test verdict: "Nachdem schon der NH-U12DX i4 durch seine Kühlleistung und den geringen Geräuschpegel überzeugen konnte, hat auch der NH-U9DX i4 in unserem Test sein Können unter Beweis gestellt und glänzt mit einem sehr guten Kühlergebnis." (Patrick Seus, mod-your-case.de)

Installation Manual (PDF)

Information Sheet (PDF)

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

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.

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

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.

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.

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