Cpu usage

im currently play squad, I would like to know the cvars that affect the cpu and how it renders information sent to the gpu.

the problem is I cannot get my cpu to utilize itself fully. I remember a time when single/dual core processors would utilize cpu/video card 90-100%

unfortunately this is not the case today in terms of gameing. I would like to know the cpu cvars the control the cpu usage to the unreal engine and how to personally modify it.