The NH-L9x65 is a taller, performance-enhanced version of Noctua’s award-winning NH-L9 low-profile coolers. With 65 instead of 37mm height and four instead of two heatpipes, the NH-L9x65 is more powerful than its smaller siblings yet retains their 95x95mm footprint, which guarantees 100% RAM and PCIe compatibility on Intel based ITX mainboards and makes the cooler more convenient to work with as it doesn’t overhang near-socket connectors. Thanks to the highly optimised NF-A9x14 premium fan that supports fully automatic speed control via PWM, the NH-L9x65 runs remarkably quiet. Topped off with the professional SecuFirm2™ multi-socket mounting system for Intel and AMD, Noctua’s renowned NT-H1 thermal compound and 6 years manufacturer’s warranty, the NH-L9x65 fuses everything users have come to expect from Noctua’s larger coolers into a compact premium package for space restricted systems.

Caution: The NH-L9x65 is a highly-compact low-profile quiet cooler designed for use in small form factor cases and HTPC environments. While it provides first rate performance in its class, it is not suitable for overclocking and should be used with care on CPUs with more than 84W TDP (Thermal Design Power). Please consult our TDP guidelines to find out whether the NH-L9x65 is recommended for your CPU.

65mm low profile

65mm low profile

Due to its compact heatsink and the 14mm thin NF-A9x14 low profile fan, the NH-L9x65 stands only 65mm tall (the same height as low-profile expansion cards), which makes it ideal for use in compact HTPCs or Small Form Factor cases that offer limited clearance for CPU coolers.
100% RAM compatibility on Intel platforms

100% RAM compatibility on Intel platforms

The NH-L9x65 has a 95x95mm footprint that complies exactly to the Intel LGA115x socket keep-out zone. This means that it won't cause issues with chipset coolers and doesn't overhang the RAM slots, making it fully compatible with tall memory modules.
100% compatibility with PCIe cards on ITX

100% compatibility with PCIe cards on ITX

Many Intel LGA115x based mini-ITX mainboards have the PCIe slot sitting close to the 95x95mm socket zone. While larger coolers that exceed this zone may block the PCIe slot, the 95x95xmm sized NH-L9x65 provides full compatibility with PCIe cards.
Easy access to near-socket connectors

Easy access to near-socket connectors

Many low-profile coolers use larger fans or heatsinks in order to achieve sufficient cooling performance, but protruding over the socket zone, they make it difficult or even impossible to reach near-socket connectors on tightly packed ITX mainboards. Thanks to its 95x95mm footprint, the NH-L9x65 provides easy access to all connectors and components.
NF-A9x14 PWM premium fan

NF-A9x14 PWM premium fan

The highly optimised NF-A9x14 premium fan features Noctua's proprietary AAO frame as well as sophisticated aerodynamic design measures. Supporting PWM for fully automatic speed control, the NF-A9x14 allows the NH-L9x65 to stay remarkably quiet.
Low-Noise Adaptor

Low-Noise Adaptor

Allowing to reduce the maximum speed of the NF-A9x14 fan from 2500 to 1800rpm, the included (L.N.A.) makes it possible to achieve near-silent setups using CPUs with up to 65W TDP.
SecuFirm2™ mounting system

SecuFirm2™ mounting system

Noctua's SecuFirm2™ mounting systems have become synonymous with quality, safety and ease of use. Supporting Intel LGA115x (LGA1150, LGA1151, LGA1155, LGA1156), LGA2011 and AMD (AM3(+), AM2(+), FM1, FM2(+)), the SecuFirm2™ mounting included with the NH-L9x65 guarantees perfect contact pressure and maximum convenience on all current sockets.
Compatibility with past and future sockets

Compatibility with past and future sockets

Complying with the open SecuFirm™ standard, the NH-L9x65 can be made compatible with the older LGA1366 and LGA775 sockets using the optional NM-I3 mounting kit, which is provided by Noctua free of charge. If technically possible, Noctua will also provide upgrade kits for future 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-A9x14 features an MTTF rating of more than 150.000 hours and the entire NH-L9x65 package comes with a full 6-year manufacturer’s warranty.
Cooler Specification
Intel LGA2011-0 & LGA2011-3(Square ILM), LGA1156, LGA1155, LGA1151, LGA1150 & AMD AM2, AM2+, AM3, AM3+, FM1, FM2, FM2+ (backplate required)
Height (without fan)
51 mm
Width (without fan)
95 mm
Depth (without fan)
95 mm
Height (with fan)
65 mm
Width (with fan)
95 mm
Depth (with fan)
95 mm
Weight (without fan)
340 g
Weight (with fan/s)
413 g
Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating
Max. TDP
see TDP guide
Fan compatibility
92x92x14, 92x92x25
Scope of Delivery
  • NF-A9x14 PWM premium fan
  • Low-Noise Adaptor (L.N.A.)
  • NT-H1 high-grade thermal compound
  • SecuFirm2™ Mounting Kit
  • Noctua Metal Case-Badge
6 Years
FAN Specification
Noctua NF-A9x14 PWM
Max. Rotational Speed (+/- 10%)
2500 RPM
Max. Rotational Speed with L.N.A. (+/- 10%)
1800 RPM
Min. Rotational Speed (PWM, +/-20%)
600 RPM
Max. Acoustical Noise
23,6 dB(A)
Max. Acoustical Noise with L.N.A.
14,8 dB(A)
Voltage Range
12 V
> 150.000 h
NH-L9x65 Video
SecuFirm2™ Intel LGA115x installation
SecuFirm2™ Intel LGA2011 installation
SecuFirm2™ AMD installation (NM-AMB1)
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.
14.08.2015 // TweakTown.com

NH-L9x65 Review

While our overclocked testing does take this cooler past its "safe zone", we are very pleased to see it was able to tame near 100W of power and still leave us free of throttling the CPU. In the stock testing, which is where this cooler is in its sweet spot, the results were much better than what the stock cooler would afford, and again, in roughly the same footprint. We really like the move to SecuFirm2 mounting hardware. We also like that everything on the motherboard is fully accessible, and when it comes to cases with tight confines designed into them, a cooler like this will keep you from having to gut the entire rig to remove a stick of RAM or get to a SATA connector. Everything Noctua boasted about with this cooler is true, and while we feel they underestimated the power that the NH-L9x65 can actually handle in the right conditions, the 84W TDP rating is fair and safe in near all conditions.
Test verdict: "Noctua revives what a compact cooler can be! The NH-L9x65 can tame our beast, comes with rock solid mounting hardware, and comes in at a fairly good price." (Chad Sebring, TweakTown.com)
24.04.2016 // eTeknix.com

NH-L9x65 Review

The SecuFirm II mounting system is worthy of much credit too and it’s been a long time favourite of mine and can be seen on many of the latest Noctua coolers. It’s incredibly easy to install, remove and maintain. The fact that Noctua also includes their high-end thermal paste, as well as a custom screwdriver to help with the install/re-install process only makes things even easier and it’s going to be a big benefit for those who plan to install these coolers in multiple systems. The overall build quality is very robust, and the design is pretty neat too. Sure, not everyone is a fan of the Noctua colour scheme, but I certainly do. The fan is one of the best small fans we’ve ever seen or heard, it’s amazingly quiet even at high RPM, despite its compact size and that’s something for Noctua to be proud of.
Test verdict: "There’s a lot to love about this cooler, and while I admit that it’s certainly not suitable for everyone’s needs, there’s a big market for very small coolers and the NH-L9x65 is one of the best in its class by a rather large margin. Capable of cooling a powerful CPU including the high-end Intel 2011 range in such a small form factor makes it an ideal choice for workstation and server deployment, or a mid-to-high end CPU with a modest overclock." (Peter Donnell, eTeknix.com)
02.04.2016 // LanOC.org

NH-L9x65 Review

So where does the Noctua NH-L9x65 land when it’s all said and done? Well just like its smaller brother, I love its small form factor. With Noctua introducing different cooling options that can handle even the higher end CPUs it has really opened up the options when it comes to our LANrig builds like our Lunchbox project builds. In fact, I’ve used the NH-L9i in 4 or 5 of our builds ranging from our LANrigs, to SFF routers. The NH-L9x65 just opens up even more options for AMD CPUs that have higher TDPs than the L9a can handle as well as the 6700K that caused the need for the L9x65 in our upcoming build. The move back to a universal mount does help with those options and it means if you want to switch to or from AMD or Intel you have the option. Like all Noctua coolers the NH-L9x65 is quiet and its cooling performance was spot on as well. It might not have matched the larger tower heatsink on our open air test bench, but it did get a lot closer than I thought possible in an enclosed ITX case.
Test verdict: "[T]he Noctua NH-L9x65 is a great option for anyone building a small form factor PC who needs the higher TDP when compared to the NH-L9a/I or if you just want a little room for overclocking. I don’t think you are going to find a better option in the form factor." (Wes Compton, LanOC.org)
23.10.2015 // PureOverclock.com

NH-L9x65 Review

The L9x65 may not have the highest thermal rating, but especially for those smaller 65W CPUs that work great in HTPCs, this cooler won’t have any issues. I believe you’d be hard pressed to find a better unit than this in this same category.
Test verdict: "The NH-L9x65 is a great little cooler for the purpose in which it was designed. It has a very low profile, decent cooling, and silent operation. As always, Noctua comes through in every area when it comes to quality. From the packaging, to the accessories, even to the cooler itself, everything about a Noctua unit says they are delivering a top notch product." (Josh Jackson, PureOverclock.com)
26.06.2015 // pcGameware.co.uk

NH-L9x65 Review

Obviously due to its size the NH-L9x65’s performance is lackluster if you were to try and compare to other air based CPU Coolers. But that would be like trying to compare the top speed of a Bugatti Veyron to that of a Smart Car! So let’s look at it’s nearest rival (that we have tested), the Silverstone Argon AR06. Simply put the performance of the Noctua NH-L9x65 put the Argon AR06 in the shade, being approximately 18 degrees cooler when looking at both the stock and overclocked results. It also does this while staying pretty quiet with a maximum recorded dBA of 40 with the 90mm fan at 100%, this drops even lower to around 37dBA with the fan switched to PWM control.
Test verdict: "The bottom line here is that we have a cooler designed to go where no other cooler is likely to fit, it’s beautifully made and extremely easy to install. The Noctua NH-L9x65 also performs well enough for modern day use and Gaming, even with an overclock!" (Mike Whatley, pcGameware.co.uk)
05.06.2015 // FunkyKit.com

NH-L9x65 Review

In conclusion, The Noctua NH-L9x65 is a small compact cooler and with most cooler of this stature their may be some limitations in the cooling capabilities. If what you need a decent up grade over stock and want a top tier company to set up shop in your case take a look at the Noctua NH-L9x65. The quality and durability of Noctua's products will not disappoint. Every Noctua I have reviewed have all been extremely easy to install. I like that a cooler does not fight back when you go to install and do not want to have to disassemble your entire rig. If you have access to the backplate in your case then installing the NH-L9x65 will be a breeze.
Test verdict: "The Noctua NH-L9x65 may have some cooling limitations in extreme overclocking conditions but if you have limited space and are in need of a cooler that can handle the stock load, look no further because the Noctua NH-L9x65 will meet those demands!" (Chris McCart, FunkyKit.com)
05.05.2015 // Noticias3D.com

NH-L9x65 Review

Noctua no podía defraudarnos. Sigue estando en lo más alto del rendimiento, aunque estemos hablando de un mero disipador de perfil bajo que podría pasar desapercibido en cualquier entorno de HTPC. El NH-L9x65 puede estar orientado a entornos de escaso espacio y parecer que su ventilador activo de 92 milímetros no puede hacer mucho, pero se las ha visto de tú a tú con un disipador de tamaño estándar y ha equilibrado las fuerzas, lo que es todo un mérito. No le pidamos rendimiento si hablamos de overclock, pero tampoco se lo vamos a exigir, ya que ése no es su campo.
Test verdict: "Volvemos a tener una solución más que buena para nuestro ordenador de pequeño tamaño, PC de bajo consumo, HTPC o similar, y si viene de parte de Noctua, conocida por su buen hacer y eficiencia, pues más que una solución se trata de una recomendación. Excelente sistema de montaje, piezas de calidad, buen rendimiento para tratarse de un disipador de perfil bajo, compatibilidad con todos los sockets actuales, deja espacio para operar y para módulos de RAM altos, y todo ello por un precio aproximado de 45 euros, algo más caro que un disipador de perfil bajo convencional, pero ya sabemos que los precios de Noctua suelen despuntar un poco respecto a otras marcas." (Iván Aparicio, Noticias3D.com)
30.04.2015 // NextHardware.com

NH-L9x65 Review

Arrivati a questo punto non abbiamo più parole da spendere per Noctua. La dedizione e la conseguente ricerca della perfezione da parte questa storica azienda è palese in ogni minimo particolare dei propri prodotti, a partire da un bundle impeccabile ormai standardizzato in tutti le nuove creazioni, caratterizzato da un ordine quasi maniacale del confezionamento ed una dotazione di tutto rispetto e, soprattutto, di qualità. Nulla da dire nemmeno riguardo il kit di installazione SecuFirm2 che, oltre ad essere universale e quindi compatibile con tutti i socket attualmente in commercio, è uno dei migliori e rapidi sistemi di montaggio sul mercato.
Test verdict: "Come al solito le prestazioni sono convincenti, considerato che il dissipatore in questione è di tipo top flow (a sviluppo orizzontale) ed è stato creato appositamente per sistemi estremamente compatti." (Alfonso Basilicata, NextHardware.com)
18.04.2015 // modding.fr

NH-L9x65 Review

On peut trouver des ventirads Top Flow plus efficace en terme de refroidissement, mais ils sont loin des 65 mm de hauteur que propose le NH-L9x65. Ce n’est pas seulement cette dimension qui rend ce ventirad attractif pour la mise en place d’une config au sein d’un petit boitier, ce sont aussi les 95 mm de coté qui font que le radiateur n’occupe que peu de place au niveau d’une carte mère mini ITX. Cela dégage ainsi de l’espace pour accéder aux différentes prises implantées sur le PCB. La compatibilité avec les barrettes mémoires s’en trouve aussi améliorée. Nous retrouvons la qualité Noctua avec une bonne finition et toujours cette simplicité de montage. Il est extrêmement dur de faire plus simple pour de ce qui est de la mise en place du ventirad sur la carte mère! la backplate est toute prête et on n’a pas besoin de batailler quant au serrage du radiateur sur le cpu. De plus Noctua fournit le tournevis et même une seringue de sa propre pâte thermique NT-H1. Un bundle toujours aussi complet! Le tout est accompagné d’une garantie de 6 ans. Malgré sa petite taille et sa vitesse de rotation, le ventilateur reste discret. Les différentes technologies d’amélioration du flux d’air tout en diminuant le niveau sonore sont efficaces.
Test verdict: "Le NH-L9x65 est un ventirad « taillé » pour les mini boîtiers, les HTPC et toute sorte de boitier où la place est comptée." (Bertrand Curras, modding.fr)
17.04.2015 // CoolingTechnique.com

NH-L9x65 Review

Il dissipatore in questione non si vuole porre infatti come una soluzione pensata per le prestazioni, ma si presenta al grande pubblico come il cugino di primo grado dell'NH-L9 di cui pur mantenendone gli ingombri laterali ne aumenta il volume in altezza, migliorando in maniera sensibile le prestazioni grazie alla superficie dissipante che cresce in maniera esponenziale rispetto alla precedente versione. Si tratta quindi di una sorta di ibrido a metà strada tra i low profile puri e i torre sotto i 130mm di altezza; una categoria sostanzialmente nuova di cui Noctua si carica le spalle e fa da pioniera. A questo si aggiunge l'ampia compatibilità con i moduli ram e sistemi di raffreddamento ad alto profilo delle schede madri, condendo il tutto con la solita qualità del gufo austriaco che non si fa mancare nemmeno in questa occasione l'eccellente sistema di ritenzione Secufirm II, con backplate e controdadi di ritenzione, assieme alle saldature in lega sul pacco alettato e cura per i dettagli assolutamente di fascia alta. Il risultato ne è un dissipatore bilanciato per l'utilizzo a cui è rivolto grazie anche alla ventola fornita di serie che sebbene risulti chiaramente presente a +12v, risulta tutto sommato sopportabile anche in ambienti tranquilli quando si trova a tensioni intermedie di daily use.
Test verdict: "Tirare delle conclusioni su questo genere di proposte non è mai semplice, se però si analizzano le premesse con il quale l'NH-L9x65 viene venduto possiamo sicuramente direi che il bersaglio è stato nuovamente centrato da parte di Noctua." (Damiano Villa, CoolingTechnique.com)

Installation Manual (PDF)

Information Sheet (PDF)

Should I take the cooler off before transporting my system?

Due to the low weight of the cooler, it is not necessary to take it off for transport.

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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