Apple 27 iMac, Model A2115, March 2019, Running Mac OS Mojave 10.14.4. 3.1 Ghz Intel Core i5, Radeon Pro 575x 4GB Graphics, 24GB RAM, 251GB Flash Storage. Comes with Power Supply.
AMD Radeon Pro 570 vs 575 vs 580 on iMac - Specification and Benchmark Comparison