27-inch (viewable) LED-backlit glossy widescreen TFT display with support for millions of colors
Resolution: 2560 by 1440 pixels
Processor
2.7GHz quad-core Intel Core i5 with 6MB on-chip shared L3 cache
3.1GHz quad-core Intel Core i5 with 6MB on-chip shared L3 cache
Configurable to 3.4GHz quad-core Intel Core i7, only at the Apple Online Store.
Memory
4GB (two 2GB) of 1333MHz DDR3 memory
Configurable to 16GB, only at the Apple Online Store.
Storage1
2.7 GHz
1TB (7200 rpm) hard drive
Configurable to 2TB hard drive or 256GB solid-state second drive, only at the Apple Online Store.
3.1 GHz
1TB (7200 rpm) hard drive
Configurable to 2TB hard drive or 256GB solid-state second drive, only at the Apple Online Store.
Graphics
2.7 GHz
AMD Radeon HD 6770M graphics processor with 512MB of GDDR5 memory
3.1 GHz
AMD Radeon HD 6970M graphics processor with 1GB of GDDR5 memory
Configurable to AMD Radeon HD 6970M with 2GB GDDR5, only at the Apple Online Store.
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
Audio
Built-in stereo speakers
Two internal 17-watt high-efficiency amplifiers
Headphone/optical digital audio output (minijack)
Audio line in/optical digital audio input (minijack)
Built-in microphone
Support for Apple iPhone headset with microphone
Two Thunderbolt ports
Mini DisplayPort output with support for DVI, VGA, and dual-link DVI (adapters sold separately)
One FireWire 800 port; 7 watts
Four USB 2.0 ports
SDXC card slot
Slot-loading 8x SuperDrive with 4x double-layer burning (DVD±R DL/DVD±RW/CD-RW)
Audio in/out
10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)
IR receiver
Input
Wi-Fi
802.11n Wi-Fi wireless networking;2 IEEE 802.11a/b/g compatible
Bluetooth
Bluetooth 2.1 + EDR (Enhanced Data Rate) wireless technology
Size and Weight