Sudden Gtx1080 FPS drop permanent

Pestytaajs

Commendable
Aug 3, 2016
1
0
1,510
So I installed my gtx1080 and it dad fine. After week or few the FPS suddenly dropped so hard, that even my old gpu had better performance.. By that I mean playing LOL it used to be 280-300 FPS, now it is 40-120 depending whether it's team fight or I'm jungling. Playing paragon the Internet says me to be it around 80fps I get only 20-25...
I already have latest updates and scanned for all viruses and removed them.
I5- 6600k cpu. Don't think it is bottlenecking.
My guess it is related with some kind of options that don't match or are configured or something. I doubt that any hardware is damaged or not good enough. I just don't have any ideas where to look, since I'm a noob in computers and Internet must have the asnwer I seek.