Issues with my PC

[Maaaaaaxxxxxxx]

Hi, in feburary I got a new pc. The specs are: 

I5 6400

Gtx 1060 6gb

8gb ram

450w psu

 

And for about 2 month i've had really bad FPS issues. Before I could play rainbowsix siege on 144fps and no problem, now. I barely get 110 on medium - low settings. And on ultra, I get 30 - 55 fps.

 

Im not that good with computers. So I really need som help here. A friend of mine said it could be driver issues and that I should use DDU to uninstall them. But I dont trust DDU since i've read on other forums that people had have issues with it. (Showing no display, etc.).

 

I'd be greatful to get some help. Thanks! 

[Apollo Refugio]

I trust DDU a lot. I used it when i upgraded my GPU and it worked like a charm. Also maybe you swithced your resolution on accident on rainbow. I did that on accident and my FPS dropped from 110 to 50 lol. also run benchmarks on your system and compare it to other systems with near-identical  specs