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Tailored to provide superior RAM and PCIe compatibility, the NH-D15S is an asymmetrical single fan version of Noctua’s award-winning flagship model, the NH-D15. Thanks to its asymmetrical design, the NH-D15S clears the top PCIe slot on most µATX and ATX motherboards. At the same time, the single fan setup and recessed lower fins guarantee 100% RAM compatibility with memory modules of up to 65mm height. Users who have sufficient room can also upgrade the cooler with either a 120mm or round 140mm fan on the front fin stack for further improved performance in dual fan mode. 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-D15S forms a complete premium quality solution that combines dual tower efficiency with excellent compatibility and flexible upgrade options.

Details
High-compatibility version of NH-D15

High-compatibility version of NH-D15

Compared to the award-winning NH-D15, the S-version uses an off-set, asymmetrical layout and a single instead of dual NF-A15 fans. This allows the NH-D15S to provide state-of-the-art heatsink performance while maintaining superior RAM and PCIe compatibility.
Excellent RAM compatibility

Excellent RAM compatibility

Thanks to its recessed lower fins, the NH-D15S provides 65mm clearance for tall memory heatsinks, making it compatible with most high end modules on the market. As the lower fins are recessed on both sides of the heatsink, compatibility is excellent not only on LGA115x and AMD, but also on LGA2011 where there are RAM slots on both sides of the socket.
Asymmetrical layout for better PCIe compatibility

Asymmetrical layout for better PCIe compatibility

As many current motherboards have the top PCIe x16 slot sitting close to the socket, bigger heatsinks tend to block it. Due to its asymmetrical layout, the fin-stack of the NH-D15S is off-set towards the upper edge of the motherboard when installed in standard orientation. This allows it to clear the top PCIe x16 slot on most current µATX and ATX motherboard.*
NF-A15 140mm fan

NF-A15 140mm fan

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.
Dual-fan ready

Dual-fan ready

Using the supplied extra fan clips, the NH-D15S can be upgraded with either a second round-frame 140mm fan with 120mm mounting holes (such as the NF-A15) for maximum performance or a common 120mm fan (such as the NF-F12) for improving performance while maintaining compatibility with RAM modules of up to 45mm height.
PWM support and Low-Noise Adaptor

PWM support and Low-Noise Adaptor

The NF-A15 premium fan supplied with the NH-D15S supports 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 Adaptor for even quieter operation.
Excellent component cooling

Excellent component cooling

Extending below the fin-stacks, the large NF-A15 fan not only contributes to the superb CPU cooling capabilities of the NH-D15S but also provides massive airflow over surrounding motherboard components and heatsinks, thus ensuring excellent component cooling performance.
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 (LGA2011-0 & LGA2011-3), LGA2066 and AMD (AM3(+), AM2(+), FM1, FM2(+)), the SecuFirm2™ mounting included with the NH-D15S 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-D15S 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-A15 features an MTTF rating of more than 150.000 hours and the entire NH-D15S package comes with a full 6-year manufacturer’s warranty.
*Please refer to our motherboard compatibility list for detailed information.
NH-D15S
Cooler Specification
Intel LGA2066, LGA2011-0 & LGA2011-3 (Square ILM), LGA1156, LGA1155, LGA1151, LGA1150 & AMD AM2, AM2+, AM3, AM3+, FM1, FM2, FM2+ (backplate required), AM4 with NM-AM4
Height (without fan)
160 mm
Width (without fan)
150 mm
Depth (without fan)
135 mm
Height (with fan)
160 mm
Width (with fan)
150 mm
Depth (with fan)
135 mm
Weight (without fan)
980 g
Weight (with fan/s)
1150 g
Material
Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating
Max. TDP
see TDP guide
Fan compatibility
140x150x25 (with 120mm mounting holes), 140x140x25 (with 120mm mounting holes), 120x120x25
Scope of Delivery
  • 1x NF-A15 PWM premium fan
  • Low-Noise Adaptor (L.N.A.)
  • Fan clips for second fan
  • NT-H1 high-grade thermal compound
  • SecuFirm2™ Mounting Kit
  • Noctua Metal Case-Badge
Warranty
6 Years
FAN Specification
Bearing
Max. Rotational Speed (+/- 10%)
1500 RPM
Max. Rotational Speed with L.N.A. (+/- 10%)
1200 RPM
Max. Acoustical Noise
24,6 dB(A)
Max. Acoustical Noise with L.N.A.
19,2 dB(A)
Input Power
1,56 W
Voltage Range
12 V
MTTF
> 150.000 h
NH-D15S
NH-D15S
NH-D15S
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.
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05.12.2016 // LegitReviews.com
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NH-D15S Review

There isn’t a whole lot new or special about Noctua’s NH-D15S CPU cooler, however it still performed very well and darn near identical to the NH-D15 – as it should.
Test verdict: "This particular cooler, the NH-D15S, was originally released on August 28, 2015, so it has been around for a while, but still performs like a king." (Brian Nyhuis, LegitReviews.com)
06.04.2016 // techPowerUp.com
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NH-D15S Review

The Noctua NH-D15S is a fantastic CPU cooler that improves on the already outstanding NH-D15. Overall, it usually stays within 1-2 °C of its sibling. With such fantastic performance on mainstream processors, the loss of a second fan does little to dampen its performance. It also doesn't hurt that noise levels are just as expected in that it's nearly silent. At 64 mm under the fins, memory clearance is good, and with the new asymmetrical design, expansion-slot clearance is greatly improved as well. Much like all Noctua coolers, the NH-D15S is easy to install thanks to the SecuFirm 2 mounting hardware, and let's face it, that paired with its exceptional build quality make this cooler a bit of a treat to work with. The fact that it's well packaged and has a nice accessories bundle is just icing on the cake. Oh and who can say no to an industry leading no fuss six year warranty?
Test verdict: "If you want top-tier performance with ultra-low noise levels and extra expansion-slot room, the Noctua NH-D15S is a damn good option." (Raymond Lemar, techPowerUp.com)
20.08.2015 // TweakTown.com
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NH-D15S Review

What is there really left to say? Noctua took what was already an award winning and well liked flagship cooler, and made it that much more user friendly. Of course, not everyone will appreciate this sort of cooler, but as an Intel X99 user, trying to populate the first slot with the GPU, it takes something offset like this product to work well in that instance. Most other offerings either are much smaller and not as efficient, or they just don't care and they go ahead and block things off.
Test verdict: "Offering complete compatibility with the memory, motherboard, and video cards, the NH-D15S is the third most efficient air cooler we have tested and does so with virtually no noise! While it is a bit expensive, we have no issues recommending it." (Chad Sebring, TweakTown.com)
22.07.2015 // 3dGameMan.com
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NH-D15S Review

Test verdict: "Like the Noctua NH-D15, the D15S is an outstanding cooler, but even better because of the improvements. It's pretty much identical, except it comes with one 140mm fan and has an asymmetrical design. This design dramatically increases it's RAM and motherboard compatibility. It's one of the best CPU air coolers out there!" (Rodney Reynolds, 3dGameMan.com)
29.03.2016 // ocaholic.ch
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NH-D15S Review

Macht man sich daran die Kühlleistung dieses Blocks zu untersuchen, dann kann man sich definitiv nicht beklagen, sprich mit den NH-D15S erhält man einen äusserst leistungsstarken Luftkühler, der aber auch alles andere als klein ausgefallen ist. Dementsprechend ist eine mehr als nur solide Performance Pflicht. Diese erhält man dann auch, wobei aber nicht nur tiefe Temperaturen das Resultat sind, sondern auch eine geringe Geräuschkulisse.Hinsichtlich Geräuschpegel kann man sich beim NH-D15S von Noctua nicht beschweren. Bei 7 Volt betrieben, ist der Lüfter unhörbar und selbst bei 12 Volt kann man den Kühler noch als leise bezeichnen.
Test verdict: "Günstig ist dieser Brocken somit nicht, dafür aber erhält man schliesslich auch Kühlleistung satt sowie eine sehr angenehme Geräuschkulisse. Unterm Strich handelt es sich hier um ein Produkt, das wir definitiv empfehlen können." (Marc Büchel, ocaholic.ch)
31.01.2016 // eTeknix.com
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NH-D15S Review

Once again, Noctua has absolutely blown us away with their latest cooler. Delivering class-leading performance, this cooler ticks all the right boxes for anyone building a system. Not only is it one of the quietest coolers we’ve ever tested, it managed to stay quiet even when we dialed in some hefty overclocks, meaning your gaming system or workstation should stay whisper quiet, even when you’re putting the heat on your CPU. Cooling performance is amazing in all our testing, and while it does run a little warmer than the Noctua NH-D15, that was to be expected given the switch from two fans to one fan, which is a move to increase compatibility more than anything. However, despite the halved number of fans, the performance is still extremely competitive and that just shows how much of the performance comes from the build quality and cooling tower design of this unit, not just the fans. The D15 model is superior and we highly recommend that if you want a Noctua cooler, that’s the one you invest in, but there’s a clear market for the D15S that we appreciate Noctua providing a product for. If you’re running an X99 system, with large ram modules on both sides of the CPU socket, the added cutaways of this model will allow you to maximize compatibility with your hardware. This does come at the cost of losing the first PCI slot, at least on most motherboards, but turn the cooler 90 degrees and you gain that slot back, albeit at the cost of having to use standard profile RAM; at least you have that option.
Test verdict: "Noctua has once again proved that you really do get what you pay for. The Noctua NH-D15S may be priced in line with many large water coolers, but it can still keep up with them in terms of performance and it outperforms almost everything on the market in terms of acoustics and compatibility. One of the best coolers money can buy." (Peter Donnell, eTeknix.com)
18.01.2016 // Hardwareluxx.de
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NH-D15S Review

Mit dem NH-D15S bietet Noctua keinen wirklich neuen Kühler an. Stattdessen ist er praktisch eine Variante des erfolgreichen NH-D15 mit verbesserter PCIe- und Speicher-Kompatibilität. Die asymmetrische Gestaltung und der Wegfall des Zweitlüfters ebnen dafür den Weg. Dabei zeigen unsere Messungen, dass der Unterschied zwischen Single- und Dual-Fan-Betrieb im Normalbetrieb minimal ist. Für viele Nutzer dürfte der NH-D15S deshalb tatsächlich auch die bessere Wahl sein: Sie müssen weniger Kompatibilitätsprobleme fürchten, dafür aber kaum Abstriche bei der Kühlleistung machen. Und für den Fall der Fälle liegen auch dem NH-D15S ein zweites Paar Lüfterklammern bei. Dabei büßt die Hochkompatibilitäts-Variante des NH-D15 nichts vom Premiumanspruch des Originals ein. Von der aufwendig gestalteten Verpackung über den perfekt verarbeiteten Kühler und den immer kultiviert arbeitenden Lüfter bis hin zum umfangreichen Zubehör zeigt sich auch der NH-D15S ganz als Premiumprodukt. Nicht vergessen werden sollte auch die ungewöhnlich lange Garantiedauer von sechs Jahren. Klammert man den semi-passiven Betrieb aus, ist der Noctua-Kühler zudem ausgesprochen leistungsstark. Letztlich bietet Noctua mit dem NH-D15S so ein rundum stimmiges Paket für den anspruchsvollen Nutzer an.
Test verdict: "Anspruchsvolle Käufer können mit dem Noctua NH-D15S eigentlich nichts falsch machen - zumal das ohnehin schon ungemein stimmige Gesamtpaket des NH-D15 jetzt durch eine bessere Kompatibilität aufgewertet wird. Wir zeichnen deshalb auch den Noctua NH-D15S mit unserem Exzellent-Hardware-Award aus." (Philipp Moosdorf, Hardwareluxx.de)
13.10.2015 // Modders-Inc.com
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NH-D15S Review

In terms of performance, the NH-D15 and NH-D15S are pretty much identical with the exception of having one fan. This is important because in most scenarios, the single middle fan can handle most of the work and even when pushed to higher OC where all other heatsinks throttle, the single fan NH-D15 was very close. Most would think that to get more always means adding things but Noctua stepped back and evaluated that the value to the consumer is much greater if the second NF-A15 fan was removed. Aside from being known for their quality and silent coolers, Noctua is also known for very high priced products and thus is out of reach for many consumers. Since each of these Noctua NF-A15 fans cost $25-30 when purchased in retail, removing one from the NH-D15 bundle lowers the price to a much more affordable $74.90 (MSRP) which makes the NH-D15S very competitive against many other high-end coolers value-wise. The shift of the heatpipe balance also fixed the single nagging clearance issue that the original NH-D15 had and that is mini-ITX and micro-ATX compatibility. With the PCI-E x16 slot sitting close to the CPU socket keep-out zone, the large NH-D15 prevented graphics card installation on many motherboards but the NH-D15 has no such problem (unless the user is an idiot and did not read the manual, resulting in an opposite installation).
Test verdict: "Just like the change from the NH-D14 to the NH-D15 seemed minor physically, closer inspection and testing revealed bigger changes than what can be observed by merely unboxing. It feels like Deja Vu with the NH-D15S but the improvements are surprisingly even more profound." (Ron Perillo, Modders-Inc.com)
16.09.2015 // OverclockersClub.com
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NH-D15S Review

The NH-D14 was the King of the Hill for several years - it was the standard that other coolers were judged against. In logical progression comes the D15 and with all the improvements, it assumed the title from the D14 as the new King of the Hill. Well, now it must share the throne with the equally potent D15S. At first glance, the D15S looks almost identical to the D15, and for the most part it is. But it has a few tricks up its sleeve that provide RAM and PCIe compatibility that the standard D15 does not have. The offset, asymmetrical base allows the D15S to clear the top PCIe slot on most µATX and ATX motherboards. And since the D15S has only one fan, you have some additional RAM space. You may not think this is a big deal until you have clearance issues. Not with the D15S. Memory modules up to 65mm tall are no problem and your first PCIe slot is open for business. The performance is on par with the D15, which is really no surprise. The D15S is clearly built to keep the heat of overclocking under control with its massive dual towers and capable (and quiet) NF-A15 fan. Noctua's well-known SecuFirm2™ multi-socket mounting system makes the installation a breeze. If you have ever installed a Noctua cooler with the SecuFirm2™, you know what I mean. There are two key factors that determine the success of a cooler. One is a properly designed heat sink that can effectively transfer the heat away from your CPU and into the fin stack, and the other is a fan that can efficiently move air through the fin stack. The NF-AF15 140mm fan effortlessly handles this task.
Test verdict: "Great cooling with memory compatibility, ease of installation, and quiet operation make the D15S another in a line of top-notch coolers from Noctua." (Chris Dawalt, OverclockersClub.com)
24.07.2015 // Overclock3D.net
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NH-D15S Review

Well, what can we say, in terms of traditional tower coolers, the high clearance, increased compatibility version of the mighty D15, with its off-set fin stack to improve GPU compatibility, 65mm of clearance underneath to decrease issues with high heat sink RAM, and only a single fan to further lessen RAM issues has totally wiped the floor with all but its bigger brother. We were expecting it to do well, but we really weren't expecting the results we got. Go back and have a look at the charts and you'll see that this cooler is only half a degree off the pace of the D15 at 4.4GHz and beasting a good few of the AIOs on the market.
Test verdict: "Quality as always with Noctua is excellent, enforced right from the moment you open the box and encounter the individually boxed interlinking accessories. If you've never owned a Noctua you owe it to yourself to own this one." (Gary Wain, Overclock3D.net)

Installation Manual (PDF)

Information Sheet (PDF)

How big is the NH-D15S and how much clearance does it provide for RAM and mainboard heatsinks?

Please refer to the following drawing for the exact measurements and clearance for RAM and motherboard heatsinks:

D15S

Does the NF-A15 PWM that comes with Noctua coolers run at a different speed (1500rpm) than the retail model (1200rpm)?

Yes, the NF-A15 PWM bundled with our heatsinks is specified to run at 1500rpm (see cooler specifications for details) and the retail model is specified to run at 1200rpm (see fan specifications for details). The 1200rpm retail model is ideal for setting up push/pull configurations in combination with the coolers’ 1500rpm stock fan because the combination of the 1500 and 1200rpm models provides a better balance of performance and noise than the combination of two 1500rpm versions. On dual-tower coolers such as the NH-D15S, we recommend to run the 1500rpm version in the center and the 1200rpm version on the front. On single-tower coolers such as the NH-U14S, we recommend to run the 1500rpm version on the front and the 1200rpm version on the back of the cooler. The NA-YC1 y-cable supplied with the retail fan can be used in order to control both fans via one PWM fan header. In this case, both fans will scale individually according to the PWM duty cycle supplied by the motherboard, e.g. they will run at ~1500/1200 respectively at 100% duty cycle, ~750/600rpm at 50% duty cycle, etc. Both at 100% and lower speeds, the speed difference between the fans reduces resonance phenomena and thus helps to achieve the best balance of performance and noise.

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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