Product discontinued.

Based on Noctua's compact NH-U9 series and fitted with the award-winning NF-B9 fan and NT-H1 thermal compound, the NH-U9DX forms a complete premium quality package that provides excellent quiet cooling performance for 4U Xeon workstations and servers. The new SecuFirm2™ mounting system for socket 771 is highly convenient and makes the NH-U9DX a tailor-made drop-in replacement for standard Intel coolers. To make your Xeon systems quieter has never been so easy!

If you're interested in using our coolers on Intel Xeon platforms, please don't hesitate to contact us at sales@noctua.at! Bundles can be customized for system integrators.
Tailor-made for Dual Xeon

Tailor-made for Dual Xeon

The NH-U9DX's fin shape has been modified so that two coolers form an air duct on Dual Xeon setups, producing superior cooling performance at very low noise levels.
SecuFirm2™ for Socket 771 and 604

SecuFirm2™ for Socket 771 and 604

Completely pre-installed, the new SecuFirm2™ mounting system ensures maximum convenience and extremely short installation time.
Drop-in replacement for standard Intel coolers

Drop-in replacement for standard Intel coolers

SecuFirm2™ for Socket 771 is fully compatible with the original Intel installation system so that the NH-U9DX works as a simple drop-in replacement.
NF-B9 92mm premium fan

NF-B9 92mm premium fan

Featuring psychoacoustic optimizations and Noctua's premium-grade SSO-bearing, the award-winning NF-B9 is renowned for its exceptional quietness and long-term stability.
NT-H1 thermal compound

NT-H1 thermal compound

Noctua's much-acclaimed NT-H1 is a pro-grade TIM solution that provides minimum thermal resistance, excellent ease-of-use and outstanding reliability.
Cooler Specifications
Intel LGA 771 & mPGA 604 (10mm mounting-holes only)
Height (without fan)
122 mm
Width (without fan)
96 mm
Depth (without fan)
65 mm
Height (with fan)
122 mm
Width (with fan)
96 mm
Depth (with fan)
90 mm
Weight (without fan)
500 g
Weight (with fan/s)
590 g
Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating
Intel Xeon 5xxx & Xeon 7xxx
Fan compatibility
92x92x25 (2 fans can be installed)
Scope of Delivery
  • 1x NH-U9DX Heatsink
  • 1x NF-B9 fan
  • Mounting-clips for 2 fans
  • Ultra-Low-Noise-Adaptor (U.L.N.A.)
  • Low-Noise-Adaptor (L.N.A.)
  • NT-H1 thermal compound
  • SecuFirm2™ mounting kits for 771/604
6 Years
FAN Specification
Rotational Speed (+/- 10%)
1600 RPM
Rotational Speed with L.N.A. (+/- 10%)
1300 RPM
Rotational Speed with U.L.N.A. (+/- 10%)
1000 RPM
64,3 m³/h
Airflow with L.N.A.
52,6 m³/h
Airflow with U.L.N.A.
41,1 m³/h
Acoustical Noise
17,6 dB(A)
Acoustical Noise with L.N.A.
13,1 dB(A)
Acoustical Noise with U.L.N.A.
7,9* dB(A)
Input Power
1,32 W
Voltage Range
12 V
> 150.000 h

Installation Manual (PDF)

How can I check whether my case is wide/high enough for the cooler?

In order to check whether the cooler isn’t too high for your case, please 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.

I get a CPU fan error despite the fan is running!

Some mainboards display a CPU fan error when the fan speed falls below a certain threshold, e.g. 900rpm. If you want to run the fan below this speed (e.g. using the supplied U.L.N.A.), please adjust the threshold in the BIOS or disable CPU fan error warning.

Which Noctua coolers are compatible with LGA1150?

The mounting is identical on all LGA115x sockets (LGA1150, LGA1155, LGA1156). The following coolers are thus compatible with LGA1150 out of the box and don’t require any upgrades in order to be used on this platform: NH-C12P SE14, NH-C14, NH-D15, NH-D14, NH-L12, NH-L9i, NH-U14S, NH-U12S, NH-U12P SE2, NH-U9B SE2. In addition, all older models which have been upgraded with the NM-I3 kit can also be used on LGA1150 without any further upgrades.

The following coolers can be made compatible to LGA1150 using the NM-i115x Upgrade-Kit and are eligible for Noctua’s free mounting kit offer: NH-C12P, NH-U12, NH-U12F, NH-U12P, NH-U12P SE1366, NH-U9, NH-U9F, NH-U9B.

The following coolers can be made compatible to LGA1150 using the NM-i115x Upgrade-Kit but are not eligible for Noctua’s free mounting kit offer: DX-Series Xeon coolers, NH-D14 SE2011.

The following coolers are mechanically incompatible with the NM-i115x Upgrade-Kit and can not be made compatible with LGA1150: DO-Series AMD Opteron coolers, NH-L9a.

Which sockets are supported or can be supported using upgrade kits?

Please refer to our socket compatibility chart.

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