5K in the second generation. Apple uses new Skylake processors in the current iMac Retina 5K version, but also a new graphics card from AMD as well as new input devices. The sophisticated build quality and powerful hardware create an impressive package, but it is not perfect. Apple iMac Retina 5K 27-inch M390 (Late 2015) Retina Review – NotebookCheck レビュー NotebookCheckがレビューしたiMac RetinaはAMD Radeon