Display
27-inch (diagonal) LED-backlit display with IPS technology; 2560-by-1440 resolution with support for millions of colors
Processor
3.2GHz
3.2GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.6GHz) with 6MB L3 cache
8GB (two 4GB) of 1600MHz DDR3 memory; four user-accessible SO-DIMM slots
Storage1
1TB (7200-rpm) hard drive
Graphics
3.2GHz
NVIDIA GeForce GT 755M graphics processor with 1GB of GDDR5 memory
Video Support and Camera
FaceTime HD camera
Simultaneously supports full native resolution on the built-in display and up to a 30-inch display (2560 by 1600 pixels) on an external display
Support for extended desktop and video mirroring modes
Support for Target Display Mode via the Thunderbolt port using a Thunderbolt to Thunderbolt cable (sold separately)
Audio
Stereo speakers
Dual microphones
Headphone port
Headphone/optical digital audio output (minijack)
Support for Apple iPhone headset with microphone
Connections and Expansion
SDXC card slot
Four USB 3 ports (compatible with USB 2)
Two Thunderbolt ports
Mini DisplayPort output with support for DVI, VGA, and dual-link DVI (adapters sold separately)
10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)
Kensington lock slot
Input
Apple Wireless Keyboard
Full-size keyboard with 78 (U.S.) or 79 (ISO) keys, including 12 function keys and 4 arrow keys (inverted “T” arrangement)
Magic Mouse
Smooth, seamless Multi-Touch surface with support for simple gestures (scrolling and swiping). Click and double-click anywhere. Ambidextrous construction accommodates left- and right-handed users.