heading NH-D15 SPECIFICATIONS VIDEOS REVIEWS SERVICE ACCESSORIES BUY Built on the basis of the legendary NH-D14 and carrying on its quest for ultimate quiet cooling performance, Noctua’s flagship model NH-D15 is an elite-class dual tower cooler for the highest demands. Its expanded heatpipe layout and two premium grade NF-A15 140mm fans with PWM support for automatic speed control allow it to further improve the NH-D14’s award-winning efficiency. Topped off with the trusted, pro-grade SecuFirm2™ multi-socket mounting system, Noctua’s proven NT-H1 thermal compound and full 6 years manufacturer’s warranty, the NH-D15 forms a complete premium quality solution that represents a deluxe choice for overclockers and silent-enthusiasts alike. ✕ Details Based on the award-winning NH-D14 Noctua's NH-D14 has received more than 350 awards and recommendations from leading international hardware websites and magazines, making it one of the most successful premium heatsinks ever built. With its expanded layout and dual NF-A15 fans, the NH-D15 further improves the D14's much acclaimed quiet cooling performance. 6 heatpipe dual tower design As compared to conventional single tower heatinks, the NH-D15's fine-tuned six heatpipe dual tower design provides more surface area, better heat-distribution and superior airflow efficiency in dual fan mode. Widened fin stack and expanded heatpipe layout Compared to the NH-D14, the NH-D15's fin-stack has been widened from 140 to 150mm and its heatpipes are now spaced further apart, which allows for a more uniform heat distribution over a larger surface area and thus contributes to the NH-D15's superior efficiency. High RAM compatibility in single fan mode Thanks to its recessed lower fins, the NH-D15 provides 64mm clearance for tall memory heatsinks in single fan mode, making it compatible with most high end RAM modules on the market. In dual fan mode, the NH-D15 should be used with standard height RAM (up to 32mm).* Dual NF-A15 140mm fans The NH-D15 features two of Noctua's premium class NF-A15 140mm fans. Complying with Noctua's AAO standard and featuring sophisticated aerodynamic design measures such as Flow Acceleration Channels, the NF-A15 has quickly built up a reputation as one of the best 140mm fans on the market. PWM support and Low-Noise Adaptors The NF-A15 premium fans supplied with the NH-D15 support PWM for convenient automatic speed control through the motherboard. In addition, the maximum fan speed can be reduced from 1500 to 1200rpm using the supplied Low-Noise Adaptors for even quieter operation. Excellent component cooling Extending below the fin-stacks, the large NF-A15 fans not only contribute to the NH-D15's superb CPU cooling capabilities but also provide massive airflow over surrounding motherboard components and heatsinks, thus ensuring excellent component cooling performance. 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, LGA2066 and AMD (AM4 (since 2019), AM3(+), AM2(+), FM1, FM2(+)), the SecuFirm2™ mounting included with the NH-D15 guarantees perfect contact pressure and maximum convenience on all current sockets. Compatibility with past and future sockets Complying with the open SecuFirm™ standard, the NH-D15 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. NT-H1 thermal compound Noctua's much-acclaimed NT-H1 is a well proven pro-grade TIM solution that provides minimum thermal resistance, excellent ease-of-use and outstanding reliability, which makes it suitable for use in professional server and workstation environments. 6-year manufacturer’s warranty Noctua products are renowned for their impeccable quality and outstanding longevity. Like all Noctua fans, the supplied NF-A15's feature an MTTF rating of more than 150.000 hours and the entire NH-D15 package comes with a full 6-year manufacturer's warranty. *In chassis with more than 165mm CPU cooler clearance, the front fan can be moved upwards to make room for memory modules taller than 32mm. See all 306 reviews for this product See all 296 reviews for this product Cooler Specification Socket compatibility Intel LGA2066, LGA2011-0 & LGA2011-3 (Square ILM), LGA1156, LGA1155, LGA1151, LGA1150 & AMD AM2, AM2+, AM3, AM3+, FM1, FM2, FM2+ (backplate required), AM4 (included since 2019, older coolers require NM-AM4) Height (without fan) 160 mm Width (without fan) 150 mm Depth (without fan) 135 mm Weight (without fan) 980 g Height (with fan) 165 mm Width (with fan) 150 mm Depth (with fan) 161 mm Weight (with fan) 1320 g Material Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating Max. TDP see CPU compatibility list Fan compatibility 140x150x25 (with 120mm mounting holes), 140x140x25 (with 120mm mounting holes), 120x120x25 Scope of delivery 2x NF-A15 PWM premium fan2x Low-Noise Adaptor (L.N.A.)Y-cableNT-H1 high-grade thermal compoundSecuFirm2™ Mounting KitNoctua Metal Case-Badge Warranty 6 Years FAN Specification Model 2x Noctua NF-A15 PWM Bearing SSO2 Max. rotational speed (+/- 10%) 1500 RPM Max. rotational speed with L.N.A. (+/- 10%) 1200 RPM Min. rotational speed (PWM, +/-20%) 300 RPM Max. airflow 140,2 m³/h Max. airflow with L.N.A. 115,5 m³/h Max. acoustical noise 24,6 dB(A) Max. acoustical noise with L.N.A. 19,2 dB(A) Voltage range 12 V MTTF > 150.000 h 14.07.2015 // LegitReviews.com NH-D15 Review On the performance side of things, the NH-D15 was fantastic! First off, the fans, while I have no way to measure the noise level, at idle or low loads the fans were whisper quiet. When the fans were spinning faster from high load, they were only slightly audible, with a manufacturer max rating of 24.6 dBA. On the actual performance end, I was very impressed with how it did. In most tests, factory speeds and overclocked, I found that the D15 was better than the previously reviewed air coolers almost every time. There were a couple cases that I noticed the D15 jump into line with the liquid coolers, which is excellent! Test verdict: "I’m not sure what to say other than “WOW!”. Noctua absolutely blew me away with this cooler, not only in the simple things like the packaging, but the ease of installation and the performance results were absolutely incredible." (Brian Nyhuis, LegitReviews.com) 16.06.2014 // techPowerUp.com NH-D15 Review The Noctua NH-D15 is truly outstanding. It rises above all competitors and takes the air-cooling crown while giving even loud AIO liquid coolers a run for their money. Simply put, Noctua's new flagship cooler offers class-leading cooling performance. Not only that, it does so while being very quiet. Test verdict: "This is why Noctua has the reputation it does. Not only does the NH-D15 take the air-cooling crown, it does so while being extremely quiet. [...] Setting a new bar for air-cooling performance while keeping noise to a minimum, the Noctua NH-D15 eats the competition alive." (Raymond Lemar, techPowerUp.com) 08.05.2014 // TweakTown.com NH-D15 Review While we had the computer in readiness for the stock level of testing, we saw the fans were spinning at 1100 RPM, and sat idle at a chilly 26.5 degrees. Once we kicked AIDA64 into action, we found that the NH-D15 comes in to the top five on our chart, ahead of all other air coolers we tested on this system, and even in the range of top tier AIOs with its 49.5 degree result. Just sliding out of the top five once we applied the overclock, the NH-D15 placed sixth overall, but again, look at what it is competing with at this level. The 69.33 degree average of all of the testing beats out the next best air cooler by almost two degrees, and most others by a fair bit more. Considering how the noise level charts play out along with these thermal results, we have to say: Noctua is definitely worthy of that crown they once had. As we mentioned, the fans were set to receive only 7.5V for this level of testing, and while spinning at 1100 RPM, they delivered only 24 dB of noise. Most of that is in the fan hub, as there is a slight hum that can be heard up close, but from a foot away, or with a case door in the way, you will be hard pressed to hear this over a PSU or video card idling. Even once we pushed 12V through the 150mm fans, we found the noise level to be just audible from a foot away, and again it is more of a mechanical hum that is audible rather than fan blade "whoosh" that most fans deliver. So, while it beats all other coolers thermally, it also offers less noise than be quiet. solutions, and even some five dB less than other Noctua models in the list. Well done Noctua, well done. [...] Noctua sort of comes out of nowhere after almost five years, and delivers such a knockout blow that is hard not to gasp when you see it coming. Building from what was the world's first of its kind, surpassing all of the mimics on the market, and doing it with much needed improvements in clearance and performance, is yet another reason why we always recommend Noctua coolers. It's also why most of the staff here currently have them or have had them in the past. They are just that good, and the NH-D15 proves that Noctua is still on top of the game, even if they have been pretty quiet lately! Test verdict: "Noctua regains the cooling crown with the release of the NH-D15! Yes - it's a beast, it may not fit in your chassis, but how can you deny an air cooler that tops all others on the charts, and does it with less noise than all the rest." (Chad Sebring, TweakTown.com) 25.04.2014 // Hexus.net NH-D15 Review Noctua is a company that understands what enthusiast consumers are looking for in a CPU cooler. Responding to market trends, the manufacturer has in recent years bolstered its portfolio with a varied range of solutions that cover any manner of build, be it small-form-factor, low-profile HTPC or high-end gaming rig. All share a common set of sought-after traits, including high-quality construction, low-noise-optimised fans, comprehensive bundles and a class-leading six-year warranty. There's plenty to like throughout the range, yet it's the best solutions that creates a buzz around the brand, and the NH-D15 is both a worthy flagship and a satisfying successor to the highly-regarded NH-D14. Despite its gargantuan size, this towering chunk of metal is refreshingly easy to install, it delivers a level of cooling performance that's on par, if not better, than today's closed-loop liquid coolers, and it's designed to make the least amount of noise possible Test verdict: "We're of the opinion that smaller and cheaper Noctua solutions will serve most users just as well - this £78 crown jewel is overkill for the vast majority of users - yet if you're heavily into overclocking and you want the very best cooling for your CPU, you'll do well to find anything better than the excellent NH-D15." (Parm Mann, Hexus.net) 29.12.2017 // TechTesters NH-D15 Review We kenden de NH-D15 al, dus dat hij zich weer als een krachtpatser toonde kwam niet als verrassing. Dit ding koelt als een beest, zo simpel is het. De NH-D15 is niet goedkoop, maar dit is wel Noctua en die gasten hebben hun zaken toch erg goed op orde. Kwaliteit top, afwerking echt top, details zoals de verpakking van accessoires en installatie top, en de 6 jaar garantie plus het feit dat ze je nieuwe mounting kits toesturen wanneer er een nieuw platform uit komt is gewoon heel chic. Je betaalt ervoor, maar je krijgt ook echt wat, en dat vinden we zowel cruciaal als gewoon heel dik ok. Hoewel we op de 8700K Noctua nu de leiding zien nemen zal het de discussie wat lucht versus water betreft niet permanent sluiten. Top-end air en top-end (niet custom) water ligt dicht bij elkaar, en de inherente voordelen van beide concepten zijn onveranderd. Luchtkoelers hebben minder kans op defecten, maar het gemak waarmee je alles op en rond je moederbord kan bereiken met een AIO valt ook genoeg voor te zeggen plus het enorme gewicht van deze D15 constructie is iets waar je rekening mee moet houden wanneer je je pc veel verplaatst. Niet elke case heeft ruimte voor radiatoren, maar de NH-D15 met het Chromax pakket erop is even goed een uitdaging om te passen, want het beest is echt bizar groot; in de hoogte, breedte, over het eerste PCIe slot, en geheugen beperk je het beste tot standaard hoogte modules. Test verdict: "De eerste lijn Chromax accessoires was aardig, maar de nieuwe lijn met o.a. de NA-HC3 kit voor de D15 plus de chromax.black.swap fan line-up is duidelijk beter. Het geeft aantrekkelijke combinaties, plus je hebt direct alle kleur opties tot je beschikking." (Stephan Overbeeke, TechTesters) 11.08.2016 // Overclock3D.net NH-D15 Review Well guys, it's been an epic and certainly the largest written review we've ever done, and with a total of 35 coolers tested we feel it qualifies for the title "Mega Test". So what have we learned along the way. Well as suspected, the Noctuas largely dominated the performance charts with the Mighty NH-D15 taking top spot overall [...]. Test verdict: "The Noctua NH-D15 earns itself a Performance award for being the coolest cooler that ever cooled. It seems it's going to take something very special to knock it off the top spot." (Gary Wain, Overclock3D.net) 15.05.2015 // ComputerBase.de NH-D15 Review Unter Prime95-Last setzt sich der NH-D15 von Noctua unangefochten an die Spitze des Testfeldes. [...] Durch die höhere thermische Last beim Übertakten des Prozessors trennt sich die Spreu vom Weizen. Der NH-D15 kann seinen Vorsprung relativ gesehen noch stärker ausbauen. Auch der etwas betagte NH-D14 kann unter erhöhten Anforderungen aufblühen und sichert sich den zweiten Platz in Prime95. Test verdict: "Der Noctua NH-D15 ist der klare Star im Testfeld. In jedem einzelnen Test kann er sich die Leistungskrone sichern und stellt die mit Abstand niedrigsten Temperaturen im Testfeld." (Robert McHardy, ComputerBase.de) 18.06.2014 // eTeknix.com NH-D15 Review This next set of numbers has me completely stunned, I had to re-test a couple of extra times just to make sure it wasn’t an external factor screwing up my numbers, but what you’re seeing is real, the NH-D15 is our coolest air cooling CPU by a huge margin. Not only is it cooler than the Cooler Master Nepton 280L, Corsair H105, Corsair H75, Nepton 140Xl and Zalman Reserator 3 MAX, all of which are high-performance water cooling units, but the nearest air cooled competitor (the GamerStorm Lucifer) runs 9 degrees warmer! The NH-D15 is also one of the quietest CPU coolers we’ve ever tested, clocking in just a fraction louder than the two latest be quiet! products and operating no louder than a whisper. [...] Noctua have really out done themselves this time, the NH-D15 is a marvel in terms of performance and as you’ve seen in our benchmarks, it flattened the competition by a wide margin when it came to overclocking our CPU. 9c cooler than the nearest air cooled rival is like Lewis Hamilton coming out in a new car that shaves off 9 seconds a lap. Then there are the water coolers which were beaten by this cooler, several of which are more expensive than the NH-D15 and several of them are regarded as some of the best cooling solutions on the market. Test verdict: "Overall this is easily one of the best coolers on the market and should you need a high quality cooler that looks great, performs exceptionally well even when overclocking and offers good value for money compared to the competition (in terms of price vs performance), then look no further than the Noctua NH-D15." (Peter Donnell, eTeknix.com) 12.06.2014 // OverclockersClub.com NH-D15 Review When we put the overclocked power to the Haswell 4770K and it cranks out the heat, the D15 continues to put out some impressive numbers. In fact, the D15 again moves to the head of the pack. When overclocked and with dual fans, it is a full 3 degrees cooler than the AIO (All In One) liquid cooled Nepton 280L and 6 degrees cooler than Noctua's original contender, the D14. As for the acoustics, one thing I have noticed with almost all of the liquid coolers I have tested is that when the fans spool up, you know it. But with the Noctua units, the fans are just so quite even at full speed, you almost wonder if you forgot to start the CPU stress test. [...] For years the NH-D14 was the King of the Hill, but move over D14, there is a new King in town and he comes from the same DNA. At a list price of $99.99 in the U.S., the NH-D15 is indeed toward the upper range of what most people will spend on a cooling solution for their computer, but for that price you get a reliable cooler that delivers high performance and beats everything I have tested. I have to say I was really surprised at how well the D15 performs. Add to that the memory compatibility, ease of installation, and quiet operation and I have a hard time finding any faults. In fact, I couldn't find any. The engineering that went into the D15 sure paid off. After you test coolers for a while, you think you have seen it all. How many more degrees can anyone shave off? You get to where you can look at a cooler and before you ever install it, you have a feel for where the thermal numbers will probably fall, and usually I am fairly close. Well, Noctua has proven that you can still find ways to push the Mercury a little farther down the thermometer. Test verdict: "I have to admit that I have always been a fan of liquid cooling and I was somewhat in denial that an air cooler could knock my liquid cooler off the throne. There is just something about the "Wow" factor of a liquid-cooled system. But the D15 has me reconsidering my viewpoint. It can truly handle the heat, and it does it quietly. Clearly, Noctua has a real winner with the NH-D15." (Chris Dawalt, OverclockersClub.com) 01.05.2014 // bit-tech.net NH-D15 Review The NH-D15 might seem expensive, but for LGA2011 owners especially, it performs as well as all the top-end all-in-one liquid coolers out there so in cooling terms it justifies its price. Even on LGA1155, which is easier to tame, it's still extremely potent, matching the 4th best result on test. Perhaps the biggest plus point for those looking to get rid of a small, whiny cooler in time for warmer summer months, the NH-D15 is also very quiet, especially so when used with the included low noise adaptors. Test verdict: "So, despite a lofty price tag, this is one awesome cooler that both performs admirably and won't make your ears bleed - far from it. With Noctua's awesome packaging and build quality on hand too, we have no qualms giving top marks." (Antony Leather, bit-tech.net) See all 306 reviews for this product NM-I3 Mounting-Kit The NM-I3 SecuFirm2™ Mounting-Kit makes Noctua CPU coolers compatible with Intel's LGA775 & LGA1366 sockets. NA-HC3 chromax.black.swap chromax.black.swap edition heatsink covers with swappable inlays (red, blue, green, yellow, black, white) Compatible with Noctua NH-D15, NH-D15S and NH-D15 SE-AM4 heatsinks Ideal for matching with Noctua’s industrialPPC or chromax line fans and anti-vibration pads NA-HC4 chromax.white chromax.white edition heatsink covers Compatible with Noctua NH-D15, NH-D15S and NH-D15 SE-AM4 heatsinks Ideal for matching with Noctua’s industrialPPC or chromax line fans and anti-vibration pads NA-HC4 chromax.black chromax.black edition heatsink covers Compatible with Noctua NH-D15, NH-D15S and NH-D15 SE-AM4 heatsinks Ideal for matching with Noctua’s industrialPPC or chromax line fans and anti-vibration pads NF-A15 HS-PWM chromax.black.swap 140x150x25mm, round frame 4-pin PWM, 1500rpm max. chromax.black.swap edition NM-AM4 mounting-kit The NM-AM4 SecuFirm2™ mounting-kit makes Noctua CPU coolers compatible with AMD's AM4 socket. You can either buy from our local sales partners or directly from us via our official Amazon and eBay stores: Amazon.comAmazon.caAmazon.co.ukAmazon.deAmazon.esAmazon.frAmazon.itAs an Amazon Associate, we earn from qualifying purchases. eBay.com eBay.de INSTRUCTIONS AND INFORMATION SHEETS (PDF) FAQs MAINBOARD COMPATIBILITY CASE COMPATIBILITY CPU COMPATIBILITY Installation Manual (PDF) Information Sheet (PDF) FAQs Should I take the cooler off before transporting my system? Can I install a Noctua cooler in my system from Acer, Dell, HP or Lenovo? What Thermal Design Power (TDP) is this cooler recommended for and how much Watt (W) of heat can it dissipate? Which sockets are supported or can be supported using upgrade kits? How should I clean my Noctua cooler? Can I upgrade my existing Noctua cooler to socket TR4 or SP3? I’ve used all the NT-H1 thermal compound that came with the cooler, can you send me more? I get a CPU fan error using my Noctua PWM fan, is it faulty? The supplied y-cable is missing a wire at one of the two connectors, is it faulty? I'm experiencing fan speed issues with my motherboard from Supermicro, what can I do? My case supports CPU coolers of up to XXXmm height, which model should I choose? How can I check if my Noctua CPU cooler already includes AM4 mounting parts? What’s the difference between NH-D15 and NH-D15S? My Intel CPU is running too hot although my heatsink supports the specified TDP, what's the problem? Is it possible to use the cooler with vertical graphic cards? How can I determine if the motherboard’s UEFI BIOS is overclocking my processor by default and deactivate this automatic overclocking? Which Noctua fan or CPU cooler should I buy? How to choose the right model? How much torque should be applied when tightening the screws of a Noctua CPU cooler? I have difficulties installing the cooler, can you help? How can I check whether my case is wide/high enough for the cooler? Which Noctua CPU coolers are compatible with AMD AM4 (Ryzen)? Which Noctua CPU coolers are compatible with Intel LGA2066? Does the package include a backplate for AMD AM2(+)/AM3(+)/FM1/FM2(+)? Can the cooler be installed turned by 90° on AMD sockets? I can't open the socket due to the mounting bars! Why doesn't the supplied backplate fit my LGA2066 / LGA2011 motherboard? Why doesn't the base of Noctua coolers have a polished, mirror like finish? Are there any concerns using Noctua CPU coolers on Intel Skylake (LGA1151) CPUs? Can I install a third fan on the NH-D15? How big is the NH-D15 and how much clearance does it provide for RAM and chipset coolers? How to remove the base protection cover? Does the mounting-system support LGA2011 based Xeon CPUs? Can I keep using the backplate / mounting system of my previous Noctua cooler for my new one? My unlocked Intel CPU is running too hot although my heatsink supports the specified TDP, what's the problem? Is it a problem that the CPU heatspreader is not covered completely by the heatsinkbase on LGA2011-3? How can I check whether my AMD mainboard has a standard AMD backplate that’s compatible with the SecuFirm2™ mounting system and how should I proceed with the installation? Is the cooler compatible with the LGA1151 socket? Is the cooler compatible with the LGA2011-3 socket? Is the cooler compatible with LGA775 and LGA1366? Why is the cooler’s contact surface slightly convex? Can I install a 140mm fan with a square frame (e.g. NF-A14)? Should I take the cooler off before transporting my system? As it is not possible to reliably calculate or control the forces that act upon a system during transport (e.g. in shipping), we generally recommend, for safety reasons, taking the cooler off. Noctua cannot be held responsible for any damage that may arise due to excessive stress during transport if you keep the heatsink installed. 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 were 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. What Thermal Design Power (TDP) is this cooler recommended for and how much Watt (W) of heat can it dissipate? Please refer to our CPU compatibility list for information on maximum recommended TDP and heat dissipation. Which sockets are supported or can be supported using upgrade kits? Please refer to our socket compatibility chart. 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. 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. I’ve used all the NT-H1 thermal compound that came with the cooler, can you send me more? Please kindly note that the NT-H1 thermal compound supplied with our coolers is a consumable item so our manufacturer’s warranty does not include providing additional thermal compound. You can purchase NT-H1 from our resellers. I get a CPU fan error using my Noctua PWM fan, is it faulty? Noctua PWM fans feature a minimum speed of 300rpm to allow for ultra quiet operation when your CPU is at idle state and doesn’t require higher cooling performance. Some mainboards display error messages such as “CPU fan error” during the booting process when the fan speed is below a certain level. If you get such error messages using your Noctua PWM fan and if such options are available in your BIOS, please either adjust the minimum fan speed monitoring limit to 200rpm or increase the minimum PWM duty cycle. If your BIOS doesn’t offer these options, please disable CPU fan errors. For detailed information on BIOS fan settings, please consult your mainoard’s manual or contact your mainboard manufacturer. The supplied y-cable is missing a wire at one of the two connectors, is it faulty? No. As mainboards can process only one rpm-signal per fan header, it would cause problems if the cable transmitted rpm-signals of both fans. For this reason, one of the two connectors does not have an rpm wire and only the fan on the other connector will transmit an rpm signal. Automatic speed control of both fans will work independently from the second fan’s rpm signal. 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 600 or 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 in the BIOS 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, by using 3rd party tools like IPMItool or IPMIutil, or by requesting a modified BIOS file from Supermicro, which takes the minimum fan speed of Noctua fans into account (charges might apply). Please note that any modifications performed with 3rd party tools are done at your own risk and that Noctua can not be held responsible for any possible issues. 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. How can I check if my Noctua CPU cooler already includes AM4 mounting parts? The NH-C14S, NH-D14, NH-D15, NH-D15S, NH-D9L, NH-L9x65, NH-U12S, NH-U14S, NH-U9S include AM4 mounting parts since 2019. There are four easy ways to verify that your cooler already includes AM4 mounting parts: Check the socket compatibility specifications on the packaging. If they include AM4, AM4 parts are included. Opening the packaging, check the printing on the accessories box. If the AMD parts pictured on the box include both a white and a grey spacer, the cooler supports AM4. Opening the accessories box, check the AMD bag. If it includes both white and grey spacers, the cooler supports AM4. Check if the AMD bag contains either NM-AMB8 or NM-AMB11 mounting bars. What’s the difference between NH-D15 and NH-D15S? The NH-D15S is an asymmetrical single fan version of the NH-D15 that has been tailored to provide superior RAM and PCIe compatibility. In particular, the NH-D15S differs from the NH-D15 in the following regards: Asymmetrical design: While both coolers are 150mm wide, the NH-D15S is off-set towards the top edge of the motherboard and thus provides more clearance towards the PCIe slot. RAM clearance: While the front fan of the NH-D15 overhangs the RAM slots on many motherboards, the single fan NH-D15S provides 65mm clearance for tall RAM modules on all compatible sockets. Total height: While the front fan of the NH-D15 must be installed slightly higher in order to provide sufficient clearance for standard height (32mm) RAM modules, the single center fan of the NH-D15S can be installed lower on the fin stack. As a result, the total height of the NH-D15 including fans is 165mm whereas the total height of the NH-D15S including its single center fan is only 160mm. Performance: While the base performance of the NH-D15 and NH-D15S heatsinks is identical, the dual fan configuration of the NH-D15 can provide 1-3°C better performance. Users who have sufficient room can also upgrade the NH-D15S with either a 120mm (e.g. NF-A12x25 PWM) or round 140mm (e.g. NF-A15 PWM) fan on the front fin stack in order to achieve the same performance levels as the NH-D15. The fan clips for installing a second fan are included with the NH-D15S. My Intel CPU is running too hot although my heatsink supports the specified TDP, what's the problem? Current processors from Intel, especially the unlocked models with the suffixes C, K, X or XE (e.g. Core i7-8700K, Core i9-7900X oder Core i9-9900K) can dissipate noticeably more heat than indicated by the TDP specification. While many motherboard models stick to the recommended power levels and clock speeds settings from Intel, there are models where the UEFI BIOS is configured in such a way that: the TDP limits are extended or disabled. the motherboard applies automatic overclocking by default, e.g. by raising the supply voltage of the CPU and using higher Turbo-Mode multipliers. Depending on the load scenario and CPU configuration settings, the actual power draw can be 1.5-3 times as high the stated TDP value. This can lead to temperature issues, especially when using smaller coolers, compact cases or cases with poor airflow, when some applications create very high loads, e.g. Prime95 with AVX2 support, 3D-rendering or simulation software. 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. You might also want to limit the TDP to either the specified value by Intel or a value that is 5-10W below the value previously read out from the CPU. This can be done in BIOS by setting the “Long Term Duration Power” manually instead of “Auto”. Furthermore, 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. The option to set an AVX-offset value is usually available for the following CPU generations: LGA1151:7th, 8th and 9th generation (Kaby Lake, Coffee Lake) LGA2011-3: 6th generation (Broadwell-E) LGA2066: 7th and 8th generation (Skylake-X) 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 most 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. Please also note that CPUs that use thermal paste instead of soldering between the DIE and the heatspreader generally run hotter. Due to the thermal bottleneck created by the thermal paste, temperatures can be high even at the specified TDP. Is it possible to use the cooler with vertical graphic cards? Depending on the chassis, card and motherboard being used, installing PCIe cards in a vertical position using riser cards may cause compatibility issues with CPU coolers. Whether there will be a problem or not depends on the exact position of the card (which is determined by the PC case and/or optional vertical GPU holder bracket), the width of the card as well as the position of the CPU socket on the motherboard. In order to verify that there is sufficient space for the cooler, please measure the distance between the centre of the CPU socket and the top of the PCI card in order to make sure that the cooler fits. 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 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. 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 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. How can I check whether my case is wide/high enough for the cooler? Most case manufacturers provide specifications for maximum CPU cooler height/clearance. Please refer to these specifications in order to verify that the cooler will fit the case. If no specifications are available, please contact the case manufactuer or measure the distance from the motherboard tray to the side panel (tower cases) or top panel (desktop cases). If this distance is bigger than the height of the cooler + 15mm (mainboard spacers + mainboard + CPU), the height/width of your case should be sufficient. 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 (AM4 mounting included since 2019, only older coolers require upgrade kit) NH-D15 SE-AM4 NH-D15S (AM4 mounting included since 2019, only older coolers require upgrade kit) NH-U14S (AM4 mounting included since 2019, only older coolers require upgrade kit) NH-U12S (AM4 mounting included since 2019, only older coolers require upgrade kit) NH-U12S SE-AM4 NH-U9S (AM4 mounting included since 2019, only older coolers require upgrade kit) NH-D9L (AM4 mounting included since 2019, only older coolers require upgrade kit) NH-C14S (AM4 mounting included since 2019, only older coolers require upgrade kit) NH-L12S NH-L9x65 (AM4 mounting included since 2019, only older coolers require upgrade kit) 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 (AM4 mounting included since 2019, only older coolers require upgrade kit) NH-D14 NH-D14 SE2011 NH-D15 (AM4 mounting included since 2019, only older coolers require upgrade kit) NH-D15S (AM4 mounting included since 2019, only older coolers require upgrade kit) NH-D9L (AM4 mounting included since 2019, only older coolers require upgrade kit) NH-L12 NH-L9x65 (AM4 mounting included since 2019, only older coolers require upgrade kit) 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 (AM4 mounting included since 2019, only older coolers require upgrade kit) NH-U12S (AM4 mounting included since 2019, only older coolers require upgrade kit) NH-U9S (AM4 mounting included since 2019, only older coolers require upgrade kit) 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-U14S TR4-SP3 NH-U12S TR4-SP3 NH-U9 TR4-SP3 NH-U12DO A3 NH-U9 DO A3 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 Does the package include a backplate for AMD AM2(+)/AM3(+)/FM1/FM2(+)? No. As most AMD mainboards come with a stock backplate preinstalled, the cooler doesn’t include an AMD backplate. If your mainboard doesn’t have a backplate, please contact our support team at email@example.com. Can the cooler be installed turned by 90° on AMD sockets? No. The new SecuFirm2™ mounting system for AM2, AM2+ and AM3 uses the same standardised hole spacing as the Intel system and thus allows for a much easier installation, but the cooler cannot be installed turned by 90°. I can't open the socket due to the mounting bars! Please first loosen one of the two thumbscrews that hold the mounting bars in place. Then untighten the second screw so that you can swivel the mounting bar and open the socket. Depending on the position of the mounting bars, you may need to swivel both. Why doesn't the supplied backplate fit my LGA2066 / LGA2011 motherboard? The supplied backplate is for LGA115x only and there is no backplate required for installation on LGA20xx (LGA2066, LGA2011-3, LGA2011-0). Please refer to the installation manual or our installation video for how to install the heatsink on LGA20xx. Why doesn't the base of Noctua coolers have a polished, mirror like finish? As most of today's PC enthusiasts use high-viscosity thermal compounds, the contact surface of Noctua coolers is optimised for use with this type of pastes. The micro-grooves at the contact surface ensure that high-viscosity thermal compounds are dispersed to a uniform thin layer across the whole contact area and that no air pockets remain between the cooler and the CPU. With a polished, mirror like surface, the risk of uneven dispersion is much higher. As too thick layers of thermal paste and air pockets drastically deteriorate heat transmission, the micro-grooves are is of vital importance to the overall cooling performance of Noctua coolers when used with today's high-viscosity thermal pastes. Are there any concerns using Noctua CPU coolers on Intel Skylake (LGA1151) CPUs? Our SecuFirm2™ mounting systems undergo comprehensive compatibility tests before being approved for new platforms. We have neither detected any problem with regard to the Intel LGA1151 platform (“Skylake”) during these tests nor have we received any reports from our customers, sales partners and system integrators that would indicate any possible issue. Our SecuFirm2™ mounting systems (with the exception of some compact L-type models) rely on coil springs to create the required contact pressure, which gives a certain flexibility both with regards to tolerances in stackup height and shocks or other forces. Compared to spring-less mounting systems, which exclusively rely on the bending of the mounting brackets in order to create contact pressure, this allows to reduce the mechanical stress on CPU, socket and motherboard and thus helps to prevent possible damage from excessive forces. However, as it is not possible to reliably calculate or control the forces that act upon a system during transport (e.g. in shipping), we generally recommend, due to safety reasons, to take off coolers with a total weight of more than 700g (incl. fan). Can I install a third fan on the NH-D15? Adding a third fan to the NH-D15 only yields minimal improvements in cooling performance (0.5°C max.), but noise levels will increase significantly. As this doesn’t make sense from a technical point of view, we don’t include mounting hardware for a third fan in the box and don’t offer it separately. How big is the NH-D15 and how much clearance does it provide for RAM and chipset coolers? Please refer to the following drawing for the exact measurements and clearance for RAM and chipset coolers:The front fins of the NH-D15 generally protrude over the RAM slots. Due to the recessed lower fins, it is still possible to use RAM modules with up to 64mm height in single fan mode. In dual fan mode, the front fan will sit above the RAM slots as well. In this case, Noctua recommends using standard height RAM (up to 32mm). However, in chassis with more than 165mm CPU cooler clearance, the front fan can be moved upwards to make room for memory modules taller than 32mm (e.g. moving the fan 5mm up will increase the total height from 165 to 170mm and make room for 37mm tall modules). How to remove the base protection cover? Noctua CPU coolers are shipped with a plastic protection cover at the bottom side of the cooler, which protects the contact surface against scratches and other damage. The base of Noctua CPU coolers is made from hard-wearing nickel plated copper, so there's nothing to worry about if you buy a Noctua cooler from second hand or if your cooler didn't come with a protection cover. Please proceed with the installation as explained in the manual. You can simply remove the cover as shown below: Does the mounting-system support LGA2011 based Xeon CPUs? 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 Square ILM socket is mechanically identical to the LGA2011 socket for Core i7, so the mounting-system is fully compatible, but it is not compatible with Xeon mainboards that use the Narrow ILM: 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. 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 the TDP limits are extended or disabled in the motherboards' BIOS. the motherboard applies automatic overclocking by default, e.g. by raising the supply voltage of the CPU and using higher Turbo-Mode multipliers. 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. 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. How can I check whether my AMD mainboard has a standard AMD backplate that’s compatible with the SecuFirm2™ mounting system and how should I proceed with the installation? The SecuFirm2™ mounting system requires a standard AMD backplate (either plastic or metal) with screw threads as shown on the pictures below. These backplates are pre-installed on the rear side of most AMD mainboards (see first picture below) and fixed to the retention module with four screws (see second picture below). If your retention module is fixed with plastic bolts instead of metal screws, please contact firstname.lastname@example.org in order to obtain an appropriate backplate. In order to proceed with the installation of your Noctua cooler, please remove the four screws and the retention module but keep the backplate in place so that you can see the screw threads from the top side of the motherboard (see third picture below). You can then proceed with the installation of the SecuFirm2™ mounting kit as described in the manual (see fourth picture below). Is the cooler compatible with the LGA1151 socket? Yes. Due to the heatsink mounting mechanism being identical on LGA1150, LGA1151, LGA1155 and LGA1156, the cooler also supports LGA1151. 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 the cooler compatible with LGA775 and LGA1366? The cooler does not support LGA775 and LGA1366 out of the box, but can be made compatible using the NM-I3 mounting kit. Noctua provides the NM-I3 kit free of charge if a proof of purchase (scan, photo or electronic copy of the invoice) of the cooler and an LGA775 or LGA1366 motherboard or CPU are presented. In order to install the cooler using the NM-I3 kit, please first unscrew the center screw of the original one-piece fastening bracket (you can reach through the fin stack using the long screw driver supplied with the cooler) and remove it. Then install the two fastening brackets of the NM-I3 kit as described in the NM-I3 installation manual. Why is the cooler’s contact surface slightly convex? As the Integrated Heat Spreaders (IHS) of today’s CPUs are slightly concave, the cooler’s contact surface has been deliberately designed to be slightly convex in order to ensure optimal contact. This way, more contact pressure will be applied at the centre of the IHS directly above the DIE, which results in better heat transfer and improved overall performance. Can I install a 140mm fan with a square frame (e.g. NF-A14)? Yes, fan clips for installing square frame 140mm fans (such as the NF-A14) are available on request via our customer support. Do you have a question concerning one of our products? Please use this form to pose a question! Disclaimer:We create and update our compatibility lists with the utmost care. Unfortunately, mainboard manufacturers tend to change certain components and heatsinks without pointing it out by using corresponding revision names. If you run into problems while installing our coolers on one of the mainboards listed as being compatible, please don't hesitate to contact our support team at email@example.com.Please also keep in mind that other components such as narrow or small cases as well as memory modules with special (higher) heat-spreaders can cause compatibility-issues.For use in systems from Dell, HP or Lenovo, please note this FAQ. Please refer to the following drawing for the exact measurements and clearance for RAM and chipset coolers: The front fins of the NH-D15 generally protrude over the RAM slots. Due to the recessed lower fins, it is still possible to use RAM modules with up to 65mm height in single fan mode. In dual fan mode, the front fan will sit above the RAM slots as well. In this case, Noctua recommends using standard height RAM (up to 32mm). However, in chassis with more than 165mm CPU cooler clearance, the front fan can be moved upwards to make room for memory modules taller than 32mm (e.g. moving the fan 5mm up will increase the total height from 165 to 170mm and make room for 37mm tall modules). Our case compatibility list helps you to quickly identify which PC cases offer sufficient clearance for which Noctua CPU coolers. The compatibility indication is based on the height of the coolers (including fans) as well as the maximum CPU cooler height specification given by the chassis manufacturer. Caution: Please note that the fans of some tower coolers (especially larger models with 140mm fans, e.g. NH-D15 or NH-U14S TR4-SP3) may overhang the RAM slots and that this can cause compatibility issues if RAM modules taller than 32mm are used. While the fans can be moved upwards to increase RAM clearance, this will increase the total height of the cooler and thus requires additional clearance inside the chassis. As a rule of thumb, if the fan overhangs the RAM, the maximum CPU cooler height specification of the case must be at least the size of the fan plus the height of the RAM minus 7mm (accounting for the height of the socket and CPU). For example, if a cooler uses a 140mm fan that overhangs the RAM and 46mm tall RAM modules are used, the max. CPU cooler height specification should be at least 179mm (140+46-7=179). For further information and instructions on how to move up the fan for each cooler model, please click the height specification link. Disclaimer: We create and update our compatibility lists with utmost care. However, case manufacturers sometimes change parts or details of their products without prior notice or explicitly indicating a revision. Therefore, Noctua cannot accept any liability, nor in any other way be held responsible, for the following compatibility information. When modern CPUs use their turbo modes, they can (depending on the configuration of the UEFI BIOS) dissipate much more heat than indicated by the manufacturer’s TDP (Thermal Design Power) specification. Just like manual overclocking, this puts higher demands on the cooling solution. Our CPU compatibility list helps you to choose the cooler model that is best suited for a given CPU and your individual requirements as far as turbo and overclocking headroom are concerned. We classify our coolers according to the following categories: best turbo/overclocking headroom medium turbo/overclocking headroom low turbo/overclocking headroom compatible without turbo/overclocking headroom compatible with certain restrictions (see comment) incompatible (see comment) For further information on CPUs exceeding their TDP ratings and how to configure the UEFI BIOS in order to avoid excessively high temperatures, please see this FAQ. Please also see our general buying guide, motherboard compatibility list and FAQs for further help on how to select the best cooler for your configuration.