New 24-inch M1 Apple iMac destroys every iMac that ever came before it in Geekbench single-core tests with +37% gains over the nearest Intel Core i7 and i9 models - NotebookCheck.net News
2019 iMac performance ranges from 5% to 66% increase over previous models | AppleInsider
Geekbench
Apple iMac with Retina 5K Display (2017) review | Digital Trends
2020 iMac 5K 8-core versus 2017 iMac Pro 8-core
Benchmarks for high-end iMac 5K show 75 percent speed gain over 2017 model | AppleInsider
New 27-Inch iMac Has Up to 80% Faster Graphics at Compute Tasks Compared to Previous Model - MacRumors
Review: 27-inch iMac with Retina 5K Display – Six Colors
MacBook Pro 15-inch (2017) Review: Faster, Stronger, Same High Price | Macworld