The 27-inch iMac 5K was announced as a significant revision ... By default, the 27-inch iMac comes with 10th-generation Intel i5 and i7 chipsets. The base model comes with a Radeon Pro 500-series ...

The Retina iMac can be further upgraded to a 4GHz quad-core Intel Core i7, 32GB of RAM a 3TB Fusion Drive ... And what a screen: the new 27-inch iMac with Retina display’s 5K, 5120 x 2880 display ...