The iMac \"Core i5\" 2.7 21.5-Inch Aluminum (Late 2013/Haswell) features a 22 nm \"Haswell/Crystalwell\" Quad Core 2.7 GHz Intel \"Core i5\" (4570R) processor with four independent processor cores on a single chip, a 4 MB shared level 3 cache, 8 GB of 1600 MHz DDR3 SDRAM (which is not intended to be upgraded after purchase), a 1 TB (5400 RPM) hard drive, and an \"integrated\" Intel Iris Pro 5200 graphics processor with 128 MB of \"Crystalwell\" embedded DRAM (and shared system memory). It also has a built-in \"FaceTime HD\" webcam and stereo speakers, but lacks an optical...