21.5-inch iMac with Retina 4K display: 3.0GHz 6-core 8th-generation Intel Core i5 processor, 256GB

3.0GHz 6-core 8th-generation Intel Core i5 processor Turbo Boost up to 4.1GHz 8GB 2666MHz DDR4 memory, configurable up to 32GB 256GB SSD storage Radeon Pro 560X with 4GB of GDDR5 memory Two Thunderbolt 3 ports Retina 4K 4096-by-2304 P3 display