Whats the best cooler for the graphics card, Sapphire ATI AMD Radeon HD 6950 GDDR5?

I`m using a AMD Athlon 2, 2.7 GHz dual core CPU and Sapphire 6970, and didn`t need extra cooling, vdeo card doesn`t even get hot when playing any game I tried Quality or Performance settings, ( even when overclocking ). Don`t see why you need extra cooling unless your case has air flow restrictions. ........................................… For coolers ask dangerden on you tube, see; DD-6990 Block Install on the ATI HD 6990 , on you tube by dangerden.