Re: [Old Report] Low GPU Usage and Framerate - WRC - DLSS no change

Apparently, UE4 just isn't great at multithreaded rendering. This is probably why most people are seeing both low CPU and GPU usage across the board, no matter what hardware they have.

Disabling hyperthreading as a quick test of this on my 4core/8thread CPU increased hardware usage dramatically for me. Didn't actually improve the game performance, but just shows that all cores/threads and the hardware in general available aren't being fully utilized. I went from ~40% CPU usage to ~80% and GPU usage shot up from 50-60% to +90% with the same exact settings as before. Although while my performance didn't seem much better, it might explain why some people with older CPUs and GPUs are claiming the game runs great for them.

Anyway, this is still a real flaw in the latest iteration of UE5 as well, @10:40 this person states UE5 is still only using 2 threads max for rendering, but a UE5 engine update coming sometime in 2024 will have proper multithreaded rendering added. So if Codies ever wants to migrate WRC over to UE5, or build the next WRC release on UE5, they may want to hold off until that junk is in there.