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Your iMac "Core i5" 2.7 21.5-Inch Aluminum (Late 2012) features a Quad Core 2.7 GHz Intel "Core i5" i5-3330S (Ivy Bridge) processor with four independent processor cores on a single chip making multitasking a breeze.
It has 8 GB Ram, and a NVIDIA GeForce GT 640M graphics processor with 512 MB of dedicated GDDR5 memory. It also has a built-in "FaceTime HD" webcam and stereo speakers making your system fast and reliable and capable of holding your data and many many photos and videos.
This model has a 21.5" 1920x1080 LED-backlit 16:9 widescreen IPS display with the "cover glass fully laminated to the LCD and anti-reflective coating." The rear of the case is aluminum and is thicker in the middle and tapers to a razor thin 5 mm at the edges giving it a lighter and slimmer look compared to previous models.
Connectivity includes four USB 3.0 ports, dual Thunderbolt ports, Gigabit Ethernet, 802.11n, and Bluetooth 4.0.
In addition to a thinner case design, the "Late 2012" iMac models have faster processors, faster architectures, faster RAM, faster graphics.