Nvidia control panel - select the preferred graphics processor for this program

I know this is an old topic, but i still wanna share what fixed my lag.

I had exactly the same issue, when i was just running without moving my mouse it went completely smooth.

When i started using my mouse i had unexplainable high frame loss.

this is what fixed it for me:

My mouse polling rate was on 1000. I put this down too 500 and my lag was completely gone! 

Hope this helps some people out with lag issues when moving the mouse.