Heavy FPS drops

[-Rax-]

Hello again,

I'm posting here cause I done the nvidia setup, even touching V-sync aspects and it doesnt seem to respond (nor that I actually know what I was doing).
I kept looking for options to solve the issue, and I found that reducing the screen width and height in the DSLauncher gave me better stats and actually worked ...for some mintues. Till then I don't only have fps problems but mouse lag as well (saying, the mouse is new and the pc is not old either) where it gets stuck and I can't use it.

Keep on mind I never had this problems before and the game worked as usual, working on a remakably good 100-140 fps.