Need some technical help with adjusting my fps!!

I have been playing league with 80 fps since season 1, and never thought of maybe trying to get better fps. I have evga Geforce 660 ti gpu, and i have overclocked it. In the riot "game" file i set all the settings to 0, and framecap to 1 and i run the game on border less if that is relevant. The game runs fine at like 230 fps but it still has minor hiccups when I auto minions. And when i try to run it on uncapped, the game just spazzes out, i also have vertical sync off and anti aliasing on SO my question is how can i run league on like 100-170 fps, like i don't really want 200 fps just anything higher than 80 Thank YOU and honor to anyone who is willing to help.