i have the same problem and all cores roughly have the same usage,my cpu is always at 40% usage and my gpu at 20% when i play fortnite and my fps drops from 144 to 20 alot of the timeWhat game?
What FPS?
What resolution?
What game settings?
Total cpu usage is fairly meaningless, you need to monitor each core/thread. If only takes 1 at 100% to limit performance while total cpu usage is much lower.