Anything I use behind Hearthstone in window mode totally lags out. Like I make my moves, then click on Safari behind to bring it to front and feels super laggy. Once I move Hearthstone to my second display, and use Safari on my main display it runs just fine. Not sure what the problem is. Havent had this issue before.
Edit: Had to recreate this thread because apparently the other one was locked up for no reason?