NVIDIA GTX 780 COMING IN MARCH 2013?

The GTX 700 series will come by March 2013 Source say at the earliest and will offer around 25-30% better performance and power efficiency as the 28nm process is refined. The legendary GK110 part that is speculated about so much is expected to remain in the non-consumer realm only – in the Tesla K20 and Quadro K6000 cards
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AMD’s Sea Islands aka HD 8000 will probably debut slightly earlier than Nvidia’s GTX 700 series but they will be having the same process yield problems as Nvidia.