MSI R6950 Twin Frozr III Power Edition – Replacement Heat Sink?

Hello,
Does anyone know of a good 3rd party heat sink that will definitely fit this non reference card? We all know that manufactures such has Artic, Thermalright and Prolimatech make such heat sinks, but of course they are for reference cards. I'm sure you can understand that I don't want to make any expensive mistakes!
Thanks,
Krutish.

Thanks for the reply flobelix.
My main concern was the amount of decibels this card produced when pushed, not its thermal properties. Under high stress the card would peak at 80-85c with a fan speed of anywhere around 80-100%. Normal gaming temps would be around 65c-75c depending on game, or gaming environment, with matching fan speeds. That is why I was looking for a replacement, the temps  were within the manufactures tolerances, even if a little high, but the db's were well outside of  mine!
However, the situation as changed somewhat. While messing around inside the case trying to improve airflow I accidentally touched the heat-sink assembly, and upon doing so the fan instantly roared to 100% and the temps started to shoot up. I wiggled the assembly again and the fan and temps dropped back! So it seemed like the heat-sink was lose! I removed the card and tightened the screws a little, this solved the problem in regards to the temp/fan shooting up, but the temps were still high!
The next step was to completely remove the heat-sink, give it a good clean and replace the thermal compound in the hope that this would solve the noise/heat problem. It was at this point that I spotted the problem! The GPU was absolutely caked in thermal compound, so much so that all of the resistors around the GPU were also covered in thermal grease, (Don't these guys know less is better?) good job they hadn't used a metal based thermal compound, that could have wrecked the card!
Anyway, I removed the mess and used TIM-clean to dissolve what was left and finished the clean up with isopropanol. I applied a small amount of compound, replaced the heat-sink and Bobs your uncle! Max loads so far, GPU 64c – Fan speed 55%... That I can live with!
So there you have it, this card as been noisy and running hot from the day I brought it, but I didn’t know any better, I've never seen or heard a MSI R6950 in action before, now I have!
Made In China. (Sad Face)
Krutish
Oh almost forgot... i heard off Artic, they recommend the Twin Turbo II, Xtreme II or the Xtreme III for this card!

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