iMac (Retina 5K, 27-inch, Late 2015)

Display

27-inch (diagonal) Retina 5K display with IPS technology

5120‑by‑2880 resolution with support for millions of colors

Processor

3.2GHz

3.2GHz quad‑core Intel Core i5 (Turbo Boost up to 3.6GHz)

3.2GHz

3.2GHz quad‑core Intel Core i5 (Turbo Boost up to 3.6GHz)

Configurable to 4.0GHz quad-core Intel Core i7 (Turbo Boost up to 4.2GHz)

3.3GHz

3.3GHz quad‑core Intel Core i5 (Turbo Boost up to 3.9GHz)

Configurable to 4.0GHz quad-core Intel Core i7 (Turbo Boost up to 4.2GHz)

Memory

8GB (two 4GB) of 1867MHz DDR3 memory; four SO-DIMM slots, user accessible