"Prior to Noctua’s announcement this past week, I’d come to the realization that it was time to build another workstation, this time for testing hard drives and NAS servers here at TweakTown. An article that will go into the details of all of the components used and why they were chosen will follow in the coming weeks, but since I have an exclusive pair of Noctua’s first heatsink designed specifically for the Opteron, we might as well take advantage of having the only pair outside of Austria.
After reading the press release I figured the new NH-U12DO (D. O. for Dual Opteron) was exactly like the NH-U12P we reviewed back in December with new mounting hardware for the Socket F Opteron; I was wrong. When I contacted Noctua about them supplying a new set of coolers for my latest build, I was worried about a couple of clearance issues with the NH-U12P and NH-C12P and I showed Noctua some photos taken with my digital calipers measuring the problem areas."
FULL STORY @ TWEAKTOWN (http://www.tweaktown.com/reviews/1612/noctua_nh_u12do_workstation_cpu_cooler_reviewed/index.html)