TSMC unlikely to make 20nm GPU chips for AMD and NVIDIA
It looks like TSMC is now facing an issue which would affect the supply of 20nm technology for video cards with AMD or NVIDIA chips. The Taiwan-based foundry is having difficulties to meet both the chipmaker's demand for the new process, therefore delaying the productions until December 2014.
NVIDIA wanted to release high-end 20nm based Maxwell GPUs, but because of this the graphics chipmaker is forced to re-engineer its GM204 and GM206 chipsets to work with the existing 28nm process.
Because of this delay, we shouldn't be expected any newer video cards until December 2014.
It was also thought that the GM104 was supposed to be meant for 20nm process, with 7.9 billion transistors and 3,200 CUDA cores. Later, NVIDIA had no choice but to move towards 28nm process. AMD on the other hand said that they will continue to use 28nm process till the end of 2014 and after that, they'll move on to 20nm and FinFET process. After this statement, one can speculate that the next gen AMD Radeon architecture could be based on 28nm process.