If you've got a new CPU and want to stress test it, then Maxon has your back with the latest release of Cinebench R23 which you can download right here.

Cinebench R23 has been designed to work with current-gen CPUs including AMD's just-released and powerhouse Intel ass kicking Zen 3-based Ryzen 5000 series processors, as well as Apple's not-even-here-yet M1 CPU for its new Mac products.
I've run my new AMD Ryzen 9 5900X processor (12 cores, 24 threads) so you can see the performance between some of the other chips that Maxon includes in the rankings for Cinebench R23 so far. The download itself weighs in at 225MB.