Lagging Midi Editor

Hello! Does anyone know why my midi editor is laggning like crazy? Been this way since i built my new PC in may. I am using a Intel Arc 750 now but i used integrated graphics for 2 months and had the same problem. Appreciate answers.

No one? Cubase was really smooth on my old windows 10 machine and my m1 macbook air so there has to be a reason why the GUI is so sluggish on my new maschine.