BloodBagBandits

Hey guys! I really need help! I have a custom built PC with: A8 6600k oced to 4.3 Asus Direct cu ii oc gtx 680 4gb of Kingston decent RAM (I know I need more) SSD with over 20 gb of free space I dont know what to do this has happened to me in alot of games but especially standalone! I will be launching the game next thing I know my screen turns kinda like the color of whatever it is displaying and my computer crashes. This only happens in games. I also get really bad preformance drops in BF4 and Dayz 120 FPS High settings in both of the games down to 10. I really need help! -Sam