Original story: A late-2014 display hooked to an early 2012 GPU The GPU powering the 27-inch iMac with Retina 5K display is the R9 M290X, with the R9 M295X offered as an optional upgrade.
Look at a spec sheet for the 27-inch iMac 5K, iMac Pro, and the Studio Display, and you'll see nearly identical numbers. The only differentiator between them is the Studio Display has 600 nits of ...
I volunteered to review the M4 iMac because I’ve got an unusually long history with Apple’s all-in-one computer. I won one of the original models in a raffle back in the late ’90s.