Hi, I just built a computer. This is the link http://pcpartpicker.com/user/ajlec12/saved/32ty except that i replaced the power supply with a 600w and my hard drive with a 3.5 inch. So when i am using it normally it works fine. I can play some games like payday, the first one, for like 15 min then my computer shuts off. Then when i play games like metro it only can play for like 2 min then my computer shuts off. I thought this was a power issue because my psu was used but i replaced it with a brand new one. Ive also ran the burn in test for 15 min on furmark and it was fine.