New mouse = game lag

[Naipross]

I got a new mouse and now cs go just lags, my fps was above 100 before but now i get really random frame drops it goes down to around 40fps and i don't know what to do any Suggestions?
Could just be a coincident

 

[LilDog1291]

What mouse did you have before and after? I don't see how a mouse could affect FPS unless some crummy software that the mouse came with is causing the problem.

 

[Naipross]

before a crappy microsoft wireless mouse 5000 and the new one is a corsair harpoon. on a and b on inferno i get like 30fps max 60...