Display:
Retina display: 15.4-inch (diagonal) LED-backlit display with IPS technology
Processor:
2.0GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.2GHz)
2.3GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.5GHz)
2.4GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.4GHz)
2.7GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.7GHz)
Memory:
8GB ot 16GB of 1600MHz DDR3L onboard memory
Storage:
256GB flash storage
512GB flash storage
Graphics:
Intel HD Graphics 4000
NVIDIA GeForce GT 650M with 1GB of GDDR5 memory and automatic graphics
switching
Intel Iris Pro Graphics
NVIDIA GeForce GT 750M with 2GB of GDDR5 memory and automatic graphics switching
Wireless:
Wi-Fi 802.11n or 802.11ac
Bluetooth 4.0
Battery:
Up to 7 hours wireless web
Other:
720p FaceTime HD camera
Backlit keyboard with ambient light sensor
HDMI port
Headphone port