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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.
Details
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.
NH-U12DO
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
Material
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
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)
Voltage Range
12 V
MTTF
> 150.000 h
NH-U12DO
30.09.2008 // TweakTown.com
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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 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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