We also did stress tests to see how CPU frequency dropped over time. When rendering in KeyShot, the Core i9-13900K started at 4.89 GHz, dropped to 4.63 GHz after a few minutes, but maintained that frequency for well over an hour. The Ryzen 9 7950X fared better here, starting at 5.5 GHz but then maintaining a solid 5.0 GHz.