iMac 21-Inch Core i5 (4 cores) 3.1Ghz (4K Retina / Late 2015)

The iMac Core i5 (Retina 4K, Late 2015 / Broadwell) features a 14-nm Broadwell Quad Core 3.1GHz Intel Core i5 processor (5675R) with four independent processor cores on a single chip, a 4MB shared level 3 cache, 16GB 1867 MHz LPDDR3 SDRAM, a 2,12Tbytesn and an integrated Intel Iris Pro 6200 graphics processor that shares system memory. It also has a built-in FaceTime HD webcam and stereo speakers. This model has a 21.5" 4096x2304 LED-backlit 16:9 widescreen IPS DCI-P3 Retina 4K display. The rear of the case is aluminum and is thicker in the middle and tapers to a razor thin 5 mm at the edges. Connectivity includes four USB 3.0 ports, dual Thunderbolt 2 ports, Gigabit Ethernet, 802.11ac Wi-Fi (802.11a/b/g/n compatible), and Bluetooth 4.0.