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Lol, don't believe rumoured specs you see on the internet this early. Same goes for R800.

I'll just say that if both rumours are true then the R800 will totally own GT300 since GT300 = 2x the speed of GT200b and RV870 = 1.5x speed of RV670 ... but no one's mentioned an Nvidia X2 part so 2xRV870 > GT300. Two GT300s will be practically impossible as GT200b is already big and hot and yet the 40nm process* doesn't give good scaling or TDP gains so the GT300 will be the biggest and hottest graphics chip ever made by itself.

*Based on the only existing TSMC 40nm product, the 4770, which achieved 1.5x scaling in dize size and 0.8x scaling in TDP. So GT300 would be an insane 626mm^2 die size and 300W TDP. I'd like to see Nvidia do an X2 part with that. Compared to an estimated 256mm^2 and 192W TDP for RV870.