Storage: 512GB SSD. 2020 Apple iMac 27" Core i7 3.8GHz 128GB RAM 2TB SSD 5700XT Nano Texture Glass. 2020 Apple iMac 27" Core i7 3.8GHz 128GB RAM 4TB SSD 5500XT Nano Texture Glass. 2017 Apple iMac Pro 27" 5K 18-Core Xeon W-2191B 2.3GHz 128GB RAM 1TB SSD A1862.