FPS drops with High End PC

Been having this problem for 2 days. My FPS drop constantly when its capped at 60, 144 or even Uncapped! Its impossible to play a game and people keep flaming and reporting me cause I cant play the game properly (the lag is real when it gets from 170 fps to 100). Ive never had this problem before I have a 144hz 2k monitor i7 7700k GTX 1080 and 16 GB RAM. Is this an issue for other people too? Let me know if you have got any solutions or if Riot is planning on patching this PD: Ive formatted my computer and have my drivers up to date also Unninstalled and installed again. Thank you for your time
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