Finally found someone has this same issue.
It has happened to me twice so far (as I noticed).
I was playing Control on my 5600x and 3070 @1080p highest settings + rt on and I only get around 40fps I thought I could try DLSS on and got around 60 fps
To be honest, it has been awhile since last time I played that game so I don't think much about the fps but the stuttering was annoying me. I literally had to look up benchmark videos youtube to double check and they all run at double my fps.
Then I realised it happened before when I was playing cyberpunk2077, and in Msi afterburner, the power limit bar was at minimum (37%). After reset it back to 100%, in Control I got 100fps at native 1080p highest settings with rt on.
2hours of playing stuttering game ...