NVIDIA's GM204 & GM206 Maxwell Taped Out At 28nm?
 

If I am reading this translated news post correctly, rumor has it that NVIDIA's GM204 and GM206 Maxwell will be 28nm instead of the expected 20nm. Then the two graphics chips are GM204 (high-end segment) and GM206 (performance segment) lie their tape out later this April and have those already possibly are already through (so the rumors timely wise information available are not) . These two graphics chips are provided in the rest yet for 28nm production, not for the 20nm manufacturing (which would require an extra tape-out, respectively, again much preparation time for mass production in doubt).

http://www.hardocp.com/news/2014/04/...out_at_28nm63/