Good condition Display 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 Connections and Expansion