The iMac “Core i5” 2.7 27-Inch Aluminum (Mid-2011) is powered by aQuad Core 2.7 GHz Intel “Core i5” I5-2500S (Sandy Bridge) processor with a dedicated 256k level 2 cache for each core and a 6 MB shared level 3 cache. In lieu of a system bus, it has a “Direct Media Interface” (DMI) that “connects between the processor and chipset” at 5 GT/s.

It has been upgraded with 8 GB of RAM (1333 MHz PC3-10600 DDR3 SDRAM), a 1 TB (7200 RPM) hard drive, a vertically-mounted slot-loading DVDR DL “SuperDrive”, and AMD Radeon HD 6770M graphics with 512 MB of dedicated GDDR5 memory.

Specifications:

• Processor: Intel Core i5
• Memory: 8GB
• Hard Drive: 1TB
• Operating System: Mac OS 10.11 El Capitan
• Warranty: 90 Days
• Condition: Grade A Refurbished. May contain light normal wear.
• Apple Model Number: MC813LL/A
• Accessories: FREE Bornd Wireless Keyboard and Mouse combo included

It has been upgraded with 8 GB of RAM (1333 MHz PC3-10600 DDR3 SDRAM), a 1 TB (7200 RPM) hard drive, a vertically-mounted slot-loading DVDR DL “SuperDrive”, and AMD Radeon HD 6770M graphics with 512 MB of dedicated GDDR5 memory.

It also has a built-in “FaceTime HD” video camera and built-in stereo speakers underneath the 27" glossy 16:9 LED-backlit TFT Active Matrix LCD (2560×1440 native) display “with IPS technology”.

Connectivity includes four USB 2.0 ports, a Firewire “800” port, built-in AirPort Extreme, Gigabit Ethernet, and an SDXC card slot as well as dual “Thunderbolt” ports that are backwards compatible with Mini DisplayPort and, likewise, each support an external display up to 30" (2560×1600). Thunderbolt also supports other peripherals that use the Thunderbolt standard which provides up to 10 Gbps of bandwidth in both directions.

Externally, the “Mid-2011” iMac line uses the same “edge-to-edge” glass design and “seamless all aluminum enclosure” as the “Mid-2010” models that came before them. Internally, however, the “Mid-2011” line is equipped with faster processors and faster graphics processors, as well as the aforementioned external improvements of a higher resolution (and wider angle) webcam and Thunderbolt.