The iMac "Core i3" 3.6 21.5-Inch Aluminum (Retina 4K, 2019/Coffee Lake) features a 14-nm "Coffee Lake" 3.6 GHz Intel "Core i3" processor (I3-8100) with four independent processor "cores" on a single chip, a 6 MB shared level 3 cache, 16GB of 2400 MHz DDR4 SDRAM that is reportedly "built into the computer" -- but it actually can be upgraded later, it is just needlessly difficult - a 256GB, and a Radeon Pro 555X graphics processor with 2 GB of dedicated GDDR5 video memory. It also has a built-in "FaceTime HD" webcam and stereo speakers.