$500-$600 gaming PC

Just give me the best gaming PC you can for that price. Don't care if it runs on medium settings just want to play games like DayZ and fallout with no lag runs smooth. I not really focused on the graphics I just want smooth gameplay. But I don't want fuzzy graphics that hurt your eyes after 30 minutes. Also don't care for small details in games so will be turning those off for better performance. Not going to be streaming or anything so don't worry about that.