So to start off, my computer never had this problem as of recent... I haven't done much to the computer, I installed a new GPU in December of 2014, and installed a new processor last November. I am inclined to think that the CPU may be overheating from what I see on HWMonitor. I can provide information once I reboot my PC... There's no blue screen of death either, the screen just goes black, and it restarts, or sometimes the PC stays running but nothing comes up on the screen... Should I try running it with one stick of RAM?