Stuttering in game

i keep getting stuttering randomly in the game and will progressively getting worse the more i play. only happens in ow i have played the game for a year and half no issues since after the last update i will get this stuttering issue checked drivers deleted/ reinstalled twice including factory resetting my pc tried changing the fps limit to match my 240 hz monitor to see if was anything to do with screen tearing but also g synch is on as well made overwatch high priority in task manager nothing seems to work

From the description, it sounds like overheating. Have you checked for that?

Additionally, all tech support posts should include a Dxdiag, as mentioned in the pinned threads. Please add that to continue troubleshooting.