Product discontinued. Successor model: NH-U12DO A3

Based on Noctua's signature NH-U12 series and fitted with the award-winning NF-P12 fan and NT-H1 thermal compound, the NH-U12DO forms a complete premium quality package that provides outstanding quiet cooling performance for AMD Opteron workstations and servers. The NH-U12DO's SecuFirm™ mounting system screws directly to the standard backplate and makes the NH-U12DO a simple drop-in replacement for AMD stock coolers.

Caution: Please note that the cooler isn't compatible with socket G34.

If you're interested in using our coolers on AMD Opteron platforms, please don't hesitate to contact us at sales@noctua.at! Bundles can be customized for system integrators.
Can be turned by 90° for optimal compatibility and positioning

Can be turned by 90° for optimal compatibility and positioning

The NH-U12DO can be installed rotated by 90° to allow for an optimal positioning of the cooler and to evade compatibility issues on dual socket mainboards.
Drop-in replacement for standard AMD coolers

Drop-in replacement for standard AMD coolers

The NH-U12DO's SecuFirm™ mounting system screws directly to the standard Socket F backplate in order to facilitate the installation process.
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.
Cooler Specification
Sockel K8 (754, 939, 940) & Sockel F (if the hole spacing is 88.9mm)
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)
530 g
Weight (with fan/s)
700 g
Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating
Fan compatibility
120x120x25mm / 120x120x38mm (2 fans can be installed)
Scope of Delivery
  • 1x NH-U12DO heatsink
  • 1x NF-P12 fan
  • Mounting-clips for 2 fans
  • Ultra-Low-Noise-Adaptor (U.L.N.A.)
  • NT-H1 thermal compound
  • SecuFirm™ mounting kits for Socket F
6 Years
FAN Specification
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
> 150.000 h
30.09.2008 // TweakTown.com

NH-U12DO Review

It took a little time but Noctua has now entered the workstation and server market with their new NH-U12DO (Dual Opteron) and NH-U12DX (Dual Xeon) coolers. Since most of the coolers found in this market are very loud and set the performance bar just above the required minimum, I think Noctua will do well with the new workstation coolers. When it comes to Opterons specifically, most enthusiast coolers coming out as of late do not include hardware to mount to 939 processors; the base that Socket F is designed after, so the possibility of using most other enthusiast coolers is shrinking quickly for Socket F. Noctua is capitalizing on the short comings of others and making a real play for workstation superiority with their new coolers. I have yet to find another high quality, low noise cooler made specifically for the Opteron or Xeon. As for uses, the workstation market is comprised of heavy Photoshop users and CAD/CAM professionals. I am sure these guys would like to have a silent workstation and that is now possible. On the other side of the fence, audio/video professionals require truly silent workstations and these are the users that will really benefit from Noctua’s latest workstation line of coolers. Mixing down a sixteen track recording can be difficult when a pair of fans is raising the acoustics of a room. I have seen several studios that spend large sums of money to have the workstations wired from a different room for this reason.
Test verdict: "The NH-U12DO puts Noctua in the workstation market where they will see little competition from other companies producing high quality CPU coolers. With the high quality parts Noctua puts out, is there really a need for anyone else to try?" (Chris Ram, TweakTown.com)

Installation Manual (PDF)

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 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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