The iMac “Core i5” 3.2 27-Inch Aluminum (Retina 5K, Late 2015/Skylake) features a 14-nm “Skylake” open space interior 3.2 GHz Intel “Core i5” processor (6500).https://www.dhammatek.co.uk/product/apple-imac-27-5k-core-i5-3-2ghz-8gb-ddr3-ram-1tb-late-2015/