Last week, AMD launched its largest midrange hardware update in years, codenamed Polaris. Polaris isn’t a brand-new architecture — that’s Vega, which arrives late this year — but it’s arguably a larger update than anything we’ve seen from AMD since the original GCN debuted in late 2011. GCN 1.1 (Bonaire, Hawaii) and 1.2 (Tonga, Fiji) both improved on the original microarchitecture and integrated ...