Hello, recently I just purchased and put together my first custom build pc ((here are the specs https://pcpartpicker.com/user/Prezeo/saved/xrTcCJ) PSU is a EVGA 500W 80 Plus Power Supply and on Windows 7 Prem) and it seemed to be working great at first. I mainly got this computer for gaming purposes, but there's a catch with it. Everytime I seem to click on a game such as CS:GO or Black Ops III, the whole pc shuts down completely. The pc also seems to be INSANELY laggy in general and when I manage to open up a game it runs 15 max FPS. I've reinstalled drivers and updated them as well as Windows, taken apart and put my whole pc back together as well, yet it's doing the same thing. Any advice?