The iMac "Core i5" 2.9 27-Inch Aluminum (Late 2012) features a 22 nm Quad Core 2.9 GHz Intel "Core i5" I5-3407S (Ivy Bridge) processor with four independent processor cores on a single chip, a 6 MB shared level 3 cache, and a NVIDIA GeForce GTX 660M graphics processor with 512 MB of dedicated GDDR5
