21.5-inch iMac with Retina 4K display: 3.6GHz quad-core 8th-generation Intel Core i3 processor, 256GB

3.6GHz quad-core 8th-generation Intel Core i3 processor 8GB 2400MHz DDR4 memory, configurable up to 32GB 256GB SSD storage Radeon Pro 555X with 2GB of GDDR5 memory Two Thunderbolt 3 ports Retina 4K 4096-by-2304 P3 display