Display: Retina display: 15.4-inch (diagonal) LED-backlit display with IPS technology Processor: 2.2GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.4GHz) 2.5GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.7GHz) Memory: 16GB of 1600MHz DDR3L onboard memory Storage: 256GB flash storage 512GB flash storage Graphics: Intel Iris Pro Graphics NVIDIA GeForce GT 750M with 2GB of GDDR5 memory and automatic graphics switching Wireless: Wi-Fi 802.11ac Bluetooth 4.0 Battery: Up to 8 hours wireless web Other: 720p FaceTime HD camera Backlit keyboard with ambient light sensor HDMI port Headphone port