FPS unstabble after recent patch

I've played LoL for a few years now. Probably since 2010? I don't remember when but Ive played a long time and I have a great machine that I play it on as well. Well a few days after the patch the game decided to change my screen resolution on me and mess my game play up. No big deal and I got over it after I had to change it back. Well now my FPS is unstable and jumping left and right. For as long as I've played the game my FPS has stayed at 60 FPS and never changed during fights or anything. Never any lower or higher. Now its bouncing from 23-170. It doesn't have a set number any more and it is rapid. All of my graphics cards are fine, drivers up to date, and proper screen resolution as well. During big team fights the screen becomes jumpy now and even capping the FPS at any number doesn't help. I'm becoming unable to team fight at 100% with it doing this and it even makes 1v1 a challenge. I hope that someone see's this and is able to shine some light on whats going on or if there's something to do to fix this problem. It happen after the patch BTW