Rust running @ 200 fps but only 30fps on screen.

Ok so I used (perf 2) to display my fps, it was reading around 200 fps and looking on (fraps) its reading 30 fps cap and 60 fps cap. I have disabled vsync from nvidia and dont know whats causing my fps to dip lower than it should be.

I dont understand why my frames are being limited and jerky.