FOUND THE SOLUTION i belive!
fix the upper frame limit. For ex: I have I7 6900K, Gtx 1080, 34 gigs of ram DDR4 at 3200, i dunno if that matters but when i changed the upper frame limit from 90 to 150 everything fixed itself.
before the upper frame limit fix just delete the prepared.cfg file. Hope it will work for all.