I've assembled a new test environment:
CPU: AMD Ryzen 9 7900X (Zen4)
Motherboard: ASRock X670E PG LIGHTNING (BIOS: 1.07)
OS: Windows11
KeyShot Viewer 11.2 Results:
4.22, with DDR5-4800 8GB x2
4.18, with DDR5-3600 8GB x2
Also good old CameraBench Results:
~521FPS, with DDR5-4800 8GB x2
~518FPS, with DDR5-3600 8GB x2
So, DDR5-5200 or higher speed memories may give better scores though, I feel DDR5-4800 is not so bad for KeyShot.