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Noctua's DX line of coolers has become a default choice in high performance quiet cooling solutions for Intel Xeon CPUs. The i4 revision supports LGA2011 (both Square ILM and Narrow ILM), LGA1356 and LGA1366 based Xeon platforms and the new D9 model provides better performance and better compatibility than previous 9cm versions: Thanks to its 95x95mm footprint and reduced 110mm height, the NH-D9DX i4 is fully 3U compliant and clears the RAM slots on LGA2011 Square ILM and LGA13xx. At the same time, the dual tower design and the new NF-A9 PWM guarantee further improved quiet cooling performance. Fitted with the professional SecuFirm2™ mounting system and bundled with Noctua's industrial-grade NT-H1 thermal compound, the NH-D9DX i4 3U forms a complete premium quality package for quietly cooling Xeon based workstations and servers.

Details
3U compatibility

3U compatibility

The NH-D9DX i4 stands only 110mm tall. This is 15mm less than previous 4U compliant 9cm DX-line coolers and allows the NH-D9DX i4 to also fit 3U cases - ideal for noise-sensitive 3U applications in fields such as audio or video processing!
100% RAM compatibility

100% RAM compatibility

With its 95x95mm footprint, the NH-D9DX i4 does not overhang the RAM slots on LGA2011 Square ILM, LGA1366 and LGA1356. This gives the user full access to the memory modules and guarantees 100% compatibility with tall heatspreaders or optional memory fans.*
NF-A9 premium fan

NF-A9 premium fan

The highly optimised features Noctua's proprietary AAO frame as well as sophisticated aerodynamic design measures such as Flow Acceleration Channels, which allows it to further improve the renowned efficiency of Noctua's previous 92mm models and contributes to the NH-D9DX i4' superior cooling performance.
PWM support and Low-Noise Adaptor

PWM support and Low-Noise Adaptor

The NF-A9 92mm fan supplied with the NH-D9DX i4 supports PWM for convenient automatic speed control through the mainboard. In addition, the maximum fan speed can be reduced from 2000 to 1550rpm using the supplied Low-Noise Adaptor for even quieter operation.
Dual fan ready

Dual fan ready

The NH-D9DX i4 includes an extra set of fan mounting clips for users who want to achieve even better cooling performance by adding a second, optional NF-A9 to the front fin stack. Using the y-cable supplied with the NF-A9 PWM retail fan, both fans can be connected to one CPU fan header.**
SecuFirm2™ mounting system

SecuFirm2™ mounting system

Noctua's SecuFirm2™ mounting systems have become synonymous with quality, safety and ease of use. Supporting Intel's LGA2011 (both Square and Narrow ILM), LGA1356 and LGA1366 Xeon platforms, the SecuFirm2™ mounting included with the NH-D9DX i4 guarantees perfect contact pressure and maximum convenience on all sockets.
6-year manufacturer’s warranty

6-year manufacturer’s warranty

Noctua products are renowned for their impeccable quality and outstanding longevity. Like all Noctua fans, the supplied NF-A9 features an MTTF rating of more than 150.000 hours and the entire NH-D9DX i4 package comes with a full 6-year manufacturer’s warranty.
*For LGA2011 Narrow ILM, please see this FAQ.

**The optional front fan will sit above the RAM and depending on the height of the RAM modules, the fan may have to be moved up so far that the total height of the cooler exceeds 110mm. As a result, the cooler may no longer fit some 3U cases. In order to guarantee full 3U compatibility in dual fan mode, please use low profile memory with up to 22mm height.
NH-D9DX i4 3U
Cooler Specification
Intel LGA2011-0 & LGA2011-3 (Square ILM & Narrow ILM), LGA1356, LGA1366 (wtih Xeon backplate)
Height (without fan)
110 mm
Width (without fan)
95 mm
Depth (without fan)
95 mm
Height (with fan)
110 mm
Width (with fan)
95 mm
Depth (with fan)
95 mm
Weight (without fan)
428 g
Weight (with fan/s)
531 g
Material
Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating
Fan compatibility
92x92x25
Scope of Delivery
  • NF-A9 PWM premium fan
  • Low-Noise Adaptor (L.N.A.)
  • NT-H1 high-grade thermal compound
  • SecuFirm2™ Mounting Kit
  • Fan-clips for second NF-A9
Warranty
6 Years
FAN Specification
Bearing
Max. Rotational Speed (+/- 10%)
2000 RPM
Max. Rotational Speed with L.N.A. (+/- 10%)
1550 RPM
Max. Acoustical Noise
22,8 dB(A)
Max. Acoustical Noise with L.N.A.
16,3 dB(A)
Voltage Range
12 V
MTTF
> 150.000 h
NH-D9DX i4 3U
09.09.2016 // ITNdaily.ru
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NH-D9DX i4 3U Review

Noctua NH-D9DX i4 3U предназначен не только для серверных решений Intel Xeon, но и для мощных и производительных Intel Core i7, ориентированных на разъемы LGA2011-0/LGA2011-3, LGA1356 и LGA1366.
Test verdict: "Для ЦП Intel Xeon E5-2609 v4 кулер Noctua NH-D9DX i4 3U является идеальным решением. Вентилятор не разгоняется до стремительных скоростей, СО остается полностью бесшумной даже в стресс-тестах." (Евгений Никифоров, ITNdaily.ru)
12.01.2015 // ByTheWay.gr
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NH-D9DX i4 3U Review

Αποτελέσματα επί αποτελεσμάτων, τρεις - τέσσερις εγκαταστάσεις και περίπου τρεις μέρες συμβίωσης οφείλουν να καταλήξουν σε ένα κάποιο συμπέρασμα. Ποιο είναι το επιμύθιο για την συγκεκριμένη πρόταση; Πάμε να δούμε αν η Noctua κάνει και πάλι όσα υπόσχεται. Στο τομέα των υλικών κατασκευής, του φινιρίσματος, της ποιότητας του παρεχόμενου ανεμιστήρα και της εν γένει εργονομίας δεν είναι υπερβολή να πούμε ότι η Noctua διδάσκει. Δεν θέλουμε να αναφέρουμε συγκεκριμένους μεγάλους κατασκευαστές που θα ήταν υπερευχαριστημένοι αν παρείχαν ανεμιστήρες που να μπορούσαν έστω και να αντέξουν την σύγκριση με αυτούς της Αυστριακής εταιρίας.Με τον 92άρη NF-Α9 PWM να είναι στην πράξη σχεδόν αθόρυβος η όλη πρόταση μπορεί σαφώς να χαρακτηριστεί ήσυχη. Εκτιμούμε ότι το 80% του γενικού πληθυσμού δεν θα δυσφορούσε ακόμα και με τους δύο ανεμιστήρες στα 12v ενώ το υπόλοιπο 19% θα προτιμούσε να χρησιμοποιήσει την παρεχόμενη αντιστάση για λειτουργία σε χαμηλότερη τάση. Και ναι,καλά καταλάβατε το εναπομείναν 1% είναι καταδικασμένο να μείνει ανικανοποίητο με οτιδήποτε πιο φασαριόζικο από το passive.Σε stock συχνότητες οι θερμοκρασίες είναι υποδειγματικές ενώ ακόμα και στις load ρυθμίσεις η ψύκτρα δεν παραδίδεται αμαχητί.Και εδώ οφείλουμε να αποδώσουμε δικαιοσύνη στην Noctua που κάνει αυτό που υπόσχεται όσο το TDP είναι εντός των normal τιμών, αλλά ιδρώνει τίμια την φανέλα ακόμα και όταν το wattage εκτραπεί προς τα επάνω. Το design για το αυξημένο pci-e και RAM clearance κρίθηκε άκρως θετικό και μακάρι να το δούμε και στις προτάσεις του ανταγωνισμού. Η απόδοση της Noctua NH-D9DX i4 3U κυμαίνεται σε πολύ καλά επίπεδα και σίγουρα δε θα απογοητεύσει όποιον την προτιμήσει.
Test verdict: "Αν ο διαθέσιμός σας χώρος(ειδικά όσοι έχουν κάποιον Server) δεν μπορεί να φιλοξενήσει τίποτα παραπάνω από την Noctua NH-D9DX i4 3U και απαιτείτε ησυχία, απόδοση και premium components,θα δυσκολευτείτε πραγματικά να βρείτε μία πιο ολοκληρωμένη και ώριμη πρόταση." (Nasioulis Evangelos, ByTheWay.gr)
28.12.2014 // XtremeSystems.org
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NH-D9DX i4 3U Review

As you can see,the NH-D9DX i4 3U has no problem keeping temperatures low, beating out my comparison unit from Dynatron.
Test verdict: "The NH-D9DX i4 3U has impressed me. It beat out the competition in my thermal tests, keeping temperatures incredibly low,even under load conditions." (Ambrosidou Nat, XtremeSystems.org)
02.12.2014 // mod-your-case.de
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NH-D9DX i4 3U Review

Mit dem NH-D9DX i4 3U erweitert Noctua seine DX-Serie um einen sehr leistungsstarken Kühler, welcher vor allem durch seine hohe Kompatibilität punkten kann. Dies betrifft nicht nur die Montage auf dem Mainboard, wo im Vergleich zu dem NH-U9DX i4 keine Gefahr besteht, dass der Kühler mit einem Speicherriegel kollidiert, sondern auch für die Bauhöhe des Kühlers. Noctua hat diese so weit geschrumpft, dass der Kühler sogar in ein Servergehäuse mit drei Höheneinheiten passt. Bei dem NH-U9DX i4 musste das Servergehäuse noch 4HE hoch sein. Die Kühlleistung kann sich durchaus sehen lassen, was auch der bis auf das Montagekit baugleiche NH-D9L kürzlich schon auf einem normalen Desktop-Mainboard unter Beweis stellte.
Test verdict: Für den Einsatz in einem Server oder einer Workstation in der ein [LGA2011] Board aktuell verbaut ist oder in Zukunft einmal verbaut wird, können wir den neuen NH-D9DX i4 3U sehr empfehlen." (Patrick Seus, mod-your-case.de)

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Installation Manual (PDF)

Information Sheet (PDF)

Is the cooler compatible with all LGA1366 mainboards?

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

1366 compatibility

Can Noctua coolers be installed on LGA2011 Narrow ILM platforms?

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

How much clearance for RAM modules does the cooler offer on Narrow ILM LGA2011?

On LGA2011 Narrow ILM platforms, the NH-D9DX i4 will usually overhang some of the RAM slots. If the cooler is oriented so that its fan blows perpendicular to the RAM slots, it offers 32mm clearance for RAM modules. If the cooler is oriented so that it blows parallel to the RAM slots, the fan needs to be moved upwards by 2mm in order to provide enough clearance for 18.75mm Very Low Profile DIMMs, thus increasing the total height of the cooler to 112mm. Please verify that you have sufficient space in your case if you want to use the NH-D9DX i4 in this configuration.

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

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

Xeon Compatibility

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

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

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

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

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

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

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

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

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

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

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

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

Do you have a question concerning one of our products? Please use this form to pose a question!