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Product discontinued. Successor model: NH-U12DX i4

Based on Noctua's signature NH-U12 series and fitted with the award-winning NF-P12 fan and NT-H1 thermal compound, the NH-U12DX 1366 forms a complete premium quality package that provides outstanding quiet cooling performance for Intel's LGA1366 Xeon 5500/5600 & Xeon E5-2400 (LGA1356) CPUs. The new SecuFirm2™ mounting system for LGA1366/1356 is highly convenient and makes the NH-U12DX 1366 a tailor-made drop-in replacement for standard Intel coolers. To make your Xeon 5500/5600/E5-2400 systems quieter has never been so easy!

Caution: The NH-U12DX 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 NH-U12P SE2 for these mainboards. Click here for further information.

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.
Details
SecuFirm2™ for Socket LGA1366/1356

SecuFirm2™ for Socket LGA1366/1356

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 LGA1366 is fully compatible with the original Intel installation system so that the NH-U12DX 1366 works as a simple drop-in replacement.
NF-P12 120mm premium fan

NF-P12 120mm premium fan

Featuring psychoacoustic optimizations and Noctua's premium-grade SSO-bearing, the award-winning NF-P12 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.
NH-U12DX 1366
Cooler Specifications
LGA1366 (backplate with screw threads for CPU cooler installation required) & LGA1356
Height (without fan)
155 mm
Width (without fan)
126 mm
Depth (without fan)
65 mm
Height (with fan)
155 mm
Width (with fan)
126 mm
Depth (with fan)
90 mm
Weight (without fan)
600 g
Weight (with fan/s)
770 g
Material
Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating
Application
Intel Xeon 55xx/56xx & E5-24xx
Fan compatibility
120x120x25mm / 120x120x38mm (2 fans can be installed)
Scope of Delivery
  • 1x NH-U12DX Heatsink
  • 1x NF-P12 fan
  • Mounting-clips for 2 fans
  • Ultra-Low-Noise-Adaptor (U.L.N.A.)
  • NT-H1 thermal compound
  • SecuFirm2™ mounting kits for LGA1366
Warranty
6 Years
FAN Specification
Bearing
Blade Geometry
Rotational Speed (+/- 10%)
1300 RPM
Rotational Speed with L.N.A. (+/- 10%)
1100 RPM
Rotational Speed with U.L.N.A. (+/- 10%)
900 RPM
Acoustical Noise
19,8 dB(A)
Acoustical Noise with L.N.A.
16,9 dB(A)
Acoustical Noise with U.L.N.A.
12,6 dB(A)
Input Power
1,08 W
Voltage Range
12 V
MTBF
> 150.000 h
NH-U12DX 1366

Installation Manual (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

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.

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 fan off the heatsink in order to reduce the weight below 700g. Noctua cannot be held responsible for any damage that may arise due to excessive stress during transport if you keep the fan installed.

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

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