27-inch iMac with Retina 5K display 3.1GHz 6-Core 256GB Storage Radeon Pro 5300
27-inch iMac with Retina 5K display 3.3GHz 6-core Radeon Pro 5300
27-inch iMac with Retina 5K display 3.8 - 3.6GHz / Radeon 5500 XT (8GB)
