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Item#: N82E16835608023

Noctua NH-U12DO A3 for AMD Opteron workstations and Servers CPU Cooler

  • 1300 RPM (standard), 1100 RPM (w/ L.N.A), 900RPM (w/ U.L.N.A.)
  • 92.3m3/h (standard), 78.5m3/h (w/L.N.A.), 63.4m3/h (W/ U.L.N.A)
  • Copper (base and heat-pipes), aluminium (cooling fins), soldered join

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Noctua's DO line of coolers has become a default choice when it comes to quietly cooling AMD Opteron CPUs. Upgrading both compatibility and performance, the new A3 model features Noctua's professional NM-A3 SecuFirm2 mounting system that not only supports socket G34, C32 and F, but also allows to install the cooler turned by 90°. Thanks to six heatpipes, a performance optimized fin stack and its two premium grade NF-P12 120mm fans, the NH-U12DO A3 cools even the hottest high-end Opteron processors at minimum noise levels. Bundled with Noctua's industrial-grade NT-H1 thermal compound, the NH-U12DO A3 forms a complete premium quality package for quietly cooling AMD workstations and servers.

  • newegg Performance optimized design The NH-U12DO A3 is based on Noctua's much acclaimed NH-U series which have received more than 300 awards and recommendations from the international press. Six heatpipes, a performance optimized fin stack and an enlarged contact surface suitable for socket G34 allow for further improved performance.
  • newegg Supports G34, C32 and Socket F Thanks to the new NM-A3 SecuFirm2 mounting system that includes brackets with both 3.5" and 4.1" hole spacing, the NH-U12DO A3 supports Socket F as well as the newer G34 and C32 sockets.
  • newegg Can be turned by 90° for optimal compatibility and positioning Noctua's NM-A3 SecuFirm2 mounting system makes it possible to install the cooler rotated by 90° in order to allow for an optimal positioning of the cooler and to evade compatibility issues on dual socket mainboards.
  • newegg Drop-in replacement for standard AMD coolers Screwing directly to the standard AMD backplate, the NM-A3 SecuFirm2 mounting system makes the new A3 revision a true drop-in replacement. Choose the appropriate mounting brackets, fix the two spring screws and you're done!
  • newegg 2x NF-P12 120mm premium fan Featuring advanced aerodynamic optimizations and Noctua's premium-grade SSO-bearing, the award-winning NF-P12 is renowned for its exceptional quietness and long-term stability. The dual fan configuration allows for increased performance and safeguarding against failure.
  • newegg NT-H1 thermal compound Noctua's much-acclaimed NT-H1 is a well proven pro-grade TIM solution that provides minimum thermal resistance, excellent ease-of-use and outstanding reliability, which makes it suitable for use in professional server and workstation environments.

Learn more about the Noctua NH-U12DO A3

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 6 years
  • Limited Warranty period (labor): 6 years
  • Read full details

Customer Reviews of the Noctua NH-U12DO A3

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  • Mark H.
  • 8/28/2015 8:16:50 PM
  • Ownership: more than 1 year
  • Verified Owner

4 out of 5 eggsgreat fan

Pros: quiet, reliable, keeps cpu cool, comes with everything needed, fit my opteron MB perfectly.

Cons: A bit pricey, which is why I only gave 4 stars.

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  • Michael S.
  • 3/17/2014 4:06:56 AM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsCool and QUIET

Pros: Quiet. The fans I had previously on my ASUS KCMA-D8 Dual Socket C32 sounded like a jet plane. I had to keep it off most of the time, even though I wanted to use it as a terminal server. If it was on, the (home) office door would be shut! Every 6 months to a year I would search for new fans with no luck. I finally came across these on the egg and am so glad I did. Yes they are big and bulky, believe it or not I've got 2 of them in my case cooling my 2 CPU's. Just so happens I've got them in one of the biggest cases out there - The cooler master cosmos II. That certainly helps with the space problem, but they are tight. The product has a nice feel to it and exudes quality - no cheap feeling here.

Cons: None so far. All is good.

Other Thoughts: Finally have peace and quiet in my office. I can't even tell if the server is on. They are loudest at startup, but once the OS kicks in, they wind on down. I've never heard them come on full speed while OS is running. When they do go full on (at startup) you can definitely hear them, but still nothing like the Pratt & Whitney 747 Turbo Jet engines that were on there before.

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  • Anonymous
  • 2/16/2014 9:29:16 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsKeeps System Cool & Quiet

Pros: keeps system cool and quiet. better than the usual heat sink and fan for server processor.

Running Hyper-V, iSCSI Initiator, and other various server apps (i.e. SQL, Cluster Node, File & Storage, etc.)

With load, nominal temp (processor) is around 100° F;+/- 5°

Cons: non so far, however expensive. but you get what you pay for.

Other Thoughts: System Config:
System Config:
8 - 4GB Kingston Hyper-X (DDR3) 1600 (non-ecc)
1 Opteron 6282 ES (2.6 GHz 16 Thread 8 Core, according to Windows Server 2012 R2)

ever since this was in production (since 9 Jan 14), it had less (only 1) issues than its predecessor even though still utilizing non robust memory (desktop edition)

Also tried 4 - 8 GB GSkills and seems to take it, again non-robust.
1 Nuctua NH-U12DO A3
Lian Li PC-70 (had to re-align some of the raiser screw for the board, but most actually have pre-align)
1 nVidia GeForce 7300 GS (did not want to use the built in video due to high resolution monitor, HP W2558HC)
1 Rosewill RBR1000-M (has built-in dual EPS for CPUs' extra power)
1 reflashed Dell Perc H310 (RAID card 6GB SAS)
1 HITACHI HUS156045VLS600 (shared cluster drive)
1 SEAGATE ST3450857SS (shared cluster drive for Hyper-V Replication Broker)
1 IBM-ESXS VPBA300C3ETS11 (OS Drive, with 1 local virtual DC on a separate partition)

0 out of 2 people found this review helpful. Did you? Yes No

4 out of 5 eggsmassive, quiet, nice for G34

Pros: Excellent cooling efficiency, comes with 4 quiet fans and various resistor cables to make it even quieter. One of the few large HSF's that fit Opterons. Did I mention it's quiet? Push-pull configuration is optional, which supposedly improves cooling efficiency by about 3-4c. Build quality is really nice

Cons: These things are huge. Let me say it again: massively huge. It overhangs two RAM slots and one PCIe slot. I have them in a CM Stacker and they barely fit- the side panel fan had to be removed to accommodate them. They come with 3-pin fans- for the price, they really should have come with PWM fans which I had to buy separately.

Other Thoughts: If you're going to do something as stupid as build a dual socket G34 workstation, it requires equally stupid cooling. Most G34 coolers are for high density servers and have tiny screaming fans. I bought these solely because they had 120mm fans without really thinking about what that meant in terms of the size of the heatsink itself. I have them in an original 12-bay CM Stacker and they barely fit in this massive case. The 92mm variant would probably be a better choice for most people. While the lack of PWM fans at this price range really annoyed me, the overall construction, sound level and efficiency are good.

1 out of 1 people found this review helpful. Did you? Yes No

  • BRIAN B.
  • 7/22/2013 4:23:58 PM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsIn response to planetbrian

Pros: You have got to be kidding, the 4th pin is for pwm speed controlled fans. if you want some for your cooler get the cougars. The Noctuas come with resisters to vary the speed of the fans and are not adjustable. If you have a worry about the temp just run them full speed. Mine never get above 45-47 deg cent even with all 32 cores running full speed and the fans are still very quiet at full speed. Mine have been on for more than a year non-stop without any problems. I will probably replace them with the pwm fans if they ever fail. You can arrange them both pointed up or one back and one up but not both back. At least that is my experience with them. It all depends on your case and how its arranged, like where the PSU is...up or down etc. The bios will still register the speed of the fans, it just can't adjust them unless you get PWM9pulse width modulated) fans which are variable speed. I am pretty sure if you send them back you will end upo with coolers that will not cool your CPU's as well, unless you get liquid cooling or they have come out with new coolers in the past 6-8 months that can cool as well as the Noctuas. You should know more about what you are talking about before you spout off or you will just look/sound stupid... or at very least ignorant, which I guess is better than stupid. I use mine on the 140 watt AMD 6282SE's on an ASUS KGPE-D16 board BTW.

Cons: None, except that it would be nice to have a choice in fans for speed control. Remember though that the PWM fans generally won't last as long as the constant speed fans. I use my computer fotr Audio recording and I would like to use the Whisper quiet mode, if it ever becomes a noise issue I will just get different fans. So far no noise issues and NO HEAT ISSUES AT ALL.

0 out of 1 people found this review helpful. Did you? Yes No

  • Richard L.
  • 6/12/2013 12:39:22 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsHUGE! but awesome!!

Pros: Make sure your case is big enough, but this is an awesome cooler and pumps out plenty of cool air. 2 fans that are 120mm can't go wrong with this cooler.

Cons: n/a

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  • Prof. C.
  • 5/8/2013 8:38:26 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsthe best for G34

Pros: the best

Cons: These are the best cooler for G34 socket. I have installed 4 of them on a supermicro 4042G-72RF4 (4x16=64 cores, 256GB RAM, 24 TB Raid 6 SAS, linux debian) to run a well-known repository of materials properties. After a bunch of fan-de-supermicrization and fan-noctuization (with extra 500$), the computer got silent and can now sit on my office. Temperatures are 25C idle and 43-45 at max (128 threads on 64 cores, measured with lm-sensors). The 10 HDs are 35-38C depending on the temperature of the office. The master HD is a Samsung SSD, trim-ed with ext4.

Size: this cooler FITs the ANTEC titan case (the old repository with 24 cores on 2xG34), sold as 4U. The cooler does NOT fit the supermicro case as the heat pipes stick out of 4-5 millimeters (noctua should make them a little shorter, with 3-4 fins less). In my setup, the heatsink of the top CPU of the motherboard also requires cutting a part of the 4 fins, up to the heat pipes (be careful with them, they contain sodium vapors).
I ended up cutting a part of the removable panel in our shop and I consider bolting a discreet dark grill. Overall the machine needs to stay ON for 4/5 years, 24/365 so it needs to be solid-reliable. I keep a few fans for safety and I can change a defective fan without turning off the machine.

These noctua are the only solution. Despite what noctua says, the U9 heatsinks are too weak for 4 sockets motherboards inside a want-to-be silent-case. With the U12, you get no more than ~45C on your cores.
My opinion is that the perfect heat sink should be a slightly shorter version of the U12, since the fan can be adjusted up/down to accommodate RAM.

Anyway, if you want a solid and silent computer, if you want to avoid problems related to liquid cooling (e.g. leaks, evaporation, corrosion), these noctuas are pretty much the only solution.

good luck.

Other Thoughts: If you can, avoid PWM fans. They push less air unless you PWM them up.

2 out of 2 people found this review helpful. Did you? Yes No

  • Joshua H.
  • 4/22/2013 3:29:13 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsUPDATE

Pros: This is an update to my previous review, noctua customer support was excellent and shipped out another fan no questions asked. They simply requested that I break off one of the fan blades on the borken fan and send them a picture (to avoid sending them the broken fan). With service like this I had to give them another egg.

Cons: Fan broke after 4ish months, but customer service was great!

Other Thoughts: I would reccomend this to others, and I would by the cooler again. In fact I will be ordering two more for a new GPU/CPU computing node for my home-build cluster.

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  • Joshua H.
  • 4/21/2013 9:23:27 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsKeep The CPU Cool

Pros: I have two of these cooling the head node of my home-built mini-cluster (I do computational research), it keeps my 6128's nice and cool.

Cons: One of the very high priced 120mm fans broke after owning it for 6months (about 3 months of use).

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  • Makoto S.
  • 4/18/2013 6:45:55 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsCool and quiet

Pros: The fans run very quietly with this. If you end up hooking it up to a source that doesn't offer PWM speed control, there are some connectors with in-line resistors that will lower the speed of the fan so you can run it more quietly.

I chose Noctua because of the great things I've read about them in computer magazines and also from using them in a build I did for my brother. I was impressed with how cool and quiet his air-cooled system was, so I decided to use Noctua for my server upgrade.

Everything is included, such as heatsink thermal compound, hex wrench, C32 and G34 brackets.

Cons: Too tall for a 4U case. Removing the fans from the heatsink can be difficult, as I've had to do in order to return it.

Other Thoughts: Newegg lists this item as being smaller with the fan attached than without the fan, which I found out is not true. Also, Newegg lists its dimensions (With Fan: 6.1" x 4.96" x 2.56") out of order. Normally, dimensions are LxWXH but the height is actually over 6.2" according to Noctua's site. The heatsink/fan work great and Newegg's problem with dimensions is no fault of the product so I will not knock the rating down. However, keep in mind that this fan is just a bit too tall to fit into a 4U case. I was able to get it to fit with the lid sitting on the heatsink, but couldn't close it. Ended up returning it for the NH-U9DO.

Also, ensure that your motherboard is compatible with 3-pin fans. My motherboard, the ASUS KCMA-D8 requires a jumper setting to be changed to use 3-pin fans.

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  • 2-5 $73.79 ea.
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Item#: N82E16835608023
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