Exactly why the tmu count was raised and not the rop. Considering that its a superscalar design, the 32 TMUs would have been perfect for the r600 as that would have meant the same 2:1 ratio nvidia used with g80 (which seems to work perfectly). But seeing how the actual stream count has been raised from 64 to 96, I'd say I would have wanted 46 TMUs instead as g80 proved the 2:1 works while anything less offers performance issues.
Regardless, the rv770 will be here months before gt200 and it should bring in a lot of money. Besides, looking at how silent ati and amd were about the original r600 (before the gazillion changes) and k10, and how nvidia is always bragging and leaking out their highend stuff, I'd say they are facing problems with gt200





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