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The iMac "Core i5" 2.5 21.5-Inch Aluminum (Mid-2011) is powered by a Quad Core 2.5 GHz Intel "Core i5" I5-2400S (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.
By default, it is configured with a vertically-mounted slot-loading "SuperDrive", and AMD Radeon HD 6750M 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 21.5" glossy 16:9 LED-backlit TFT Active Matrix LCD (1920x1080 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 a single "Thunderbolt" port that is backwards compatible with Mini DisplayPort and, likewise, supports an external display up to 30" (2560x1600). Thunderbolt also supports other peripherals that use the Thunderbolt standard which provides up to 10 Gbps of bandwidth in both directions.
|Processor||Intel® Core™ i5-2400S Processor (6M Cache, up to 3.30 GHz)|
|Hard Drive||500GB HDD|
|Ports||FireWire (IEEE1394b) x 1 | RJ45 Lan Port x 1 | USB 2.0 x 4|
|Display||21.5" glossy 16:9 LED-backlit TFT Active Matrix LCD 1920x1080 native IPS|
|Wireless||AirPort Extreme, Bluetooth, Ethernet, Fast Ethernet, Gigabit Ethernet, IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n|
|Dimensions||18.8 x 45.1 x 52.8 cm|
|Operating System||OS Sierra|
|Graphics||AMD Radeon HD 6750M|
|Keyboard and Mouse||Not included|
|Model||Mid-2011 - MC309LL/A|
|Processor||Intel Core i5-2xxxx|
|Processor Frequency||2GHz to 3GHz|
|Memory Layout (Modules X Size)||No|
|Internal Memory (RAM)||8GB|
|Memory Clock Speed||1333MHz To 1499MHz|
|Supported Memory Types||DDR3-SDRAM|
|Front Camera Megapixel||HD Camera|
|Display Resolution||1920 X 1080 Pixels|
|Card Reader Integrated||Yes|
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