Apple iMac 27-Inch Core i5 (4 Cores) 3.3GHz (5K Retina / Mid 2015)

The iMac "Core i5" 3.3 27-Inch Aluminum (Mid-2015/Retina 5K) features a quad-core Intel "Core i5" (4590) 22nm "Haswell" processor at 3.3 GHz with four independent processor cores on a single chip, 6MB shared L3 cache, 16GB of 1600 MHz DDR3L SDRAM (PC3-12800) installed in pairs (two 8GB modules), a 1TB 7200 RPM hard drive, and an AMD Radeon R9 M290 graphics processor with 2GB of dedicated GDDR5 memory. It also features a built-in "FaceTime HD" web camera and stereo speakers. This model features a 27-inch 16:9 widescreen IPS display at 5120x2880 with LED backlighting, which Apple has named "Retina 5K". The back of the enclosure is aluminum, thicker in the middle and tapering to an exceptionally thin 5mm at the edges. Connectivity includes four USB 3.0 ports, dual Thunderbolt 2 ports, Gigabit Ethernet, Wi-Fi 802.11ac (backward compatible with 802.11a/b/g/n), and Bluetooth 4.0.