My game will never go above 80 fps and is constantly tanking frames. I have tried a few suggestions online with G-sync on/off and fullscreen settings but nothing seems to work.

please help!

Forgot to mention I am playing the game @ 2560x1440P 143Hz

I'm not a technical expert, so I may not be able to help you, but could you share your DxDiag so we can get comprehensive information about your system?