Shoggy: Compatibility with both cards = very good news. Will block be inner structure wise similar to 480's block? (trying to guesstimate possible performance from 480 block roundup)

Interesting to see how ati's 6990 will turn out. 6850/6870 are just more energy efficient 5850/5870 gpus/gtx460 competitors. Though middle end gpus make up majority of market, it's top gpu-s that make us drool