Tomb Raider DX12 is able to use more than 4 cores well, and I would expect Assassin's Creed benchmark, with so many AIs around, to offload that to extra threads. Witcher and Fallout are known to benefit from fast RAM, but are easy on CPU. Battlefield1 uses extra cores/threads in multiplayer, while in singleplayer (like here) it does well even on lower core-count CPUs. GTA5 struggles with 2-cores, can hick-up with 2c/4t, and rarely on 4c/4t, but average fps does not reveal that (something with the i5 7400 happens here at 4.59 https://www.youtube.com/watch?v=DbDpMWo7XTk)