AMD's biggest client at the moment is probably Apple. The chip maker supplied the 2016 Macbook Pro 15 refresh with the Radeon Pro 555 and 560 graphics cards and now has a new Radeon Pro 500 series of graphics cards for the freshly upgraded 2017 iMac. The new Radeon Pro 500 line, which is based on the Polaris architecture, has five models - from the Radeon Pro 555 with 1.3 TFLOPS of peak performance and 81 GB/S of bandwidth all the way to the 5.5 TFLOP, 217 GB/S Radeon Pro 580 with the Pro 560, Pro 570 and Pro 575 graphics cards sitting in between. Each of the new graphics chips has more...
Source: http://www.gsmarena.com/amds_new_radeon_pro_500_lives_in_the_new_macs-news-25448.php