It looks like 2017 could be a big year for AMD. Two new GPUs that we haven't heard of have been spotted. When looking up a hex file taken from macOS Sierra drivers, Anandtech forum user Glo found mentions of two new GPUs, Polaris 10 XT2 and Polaris 12. These could very well be a revision of AMD's Polaris 10 architecture or a totally different chip from the already released Polaris 11 and Polaris 10.
- CES 2018