I am thinking about upgrading it would it be worth it? I own a 1080Ti and play on 3 1080p monitors but may go 4k if i feel like my 1080Ti can handle games at ultra and get 60fps at 4k. My CPU now is an i5-4690 and i have not seen it bottleneck yet but idk. Would i see huge FPS gains with an i7-8600K?