Apple iMac MK482LL/A 27-Inch Retina 5K Display Desktop (Intel Quad-Core i5 3.3GHz, 8GB RAM),(Discontinued by Manufacturer) 3.3GHz quad-core Intel Core i5 Turbo Boost up to 3.9GHz 8GB Onboard Memory (Configurable up to 32GB) 2TB Fusion Drive AMD Radeon R9 M395 graphics processor with 2GB of GDDR5 memory 27" Retina 5K Display 5120 x 2880 Resolution 3.3 GHz Intel Core i5 8GB of 1867 MHz DDR3 Onboard Memory 2TB Fusion Drive AMD Radeon R9 M395 graphics processor with 2GB of GDDR5 memory 802.11ac Wi-Fi, Bluetooth 4.0 2x Thunderbolt 2 and 4x USB 3.0 Ports FaceTime HD Camera, Dual Mics, Speakers Mac OS X El Capitan