system
A chat on subreddit /r/pcmasterrace
human
Your cpu is maxed out, that's why. It's called a bottleneck. Your gpu is waiting on your cpu for everything.

Run the ingame benchmark tool and you'll see this in the results.
gpt
thats cpu should not bottle neck the gpu that hard. if it was like a 2nd gen i5 i'd say:  "yeah sure" .. but a 12th gen i3.. something seem off here.