My computer has been rebooting seemingly randomly while I'm in the middle of playing games.  There are no error messages, crashes, BSOD, or anything like that.  I am just playing a game and all of a sudden the screen goes blank and then I see my PC startup messages and Windows is booting up.  This has been going on for a few months now so I've tried a bunch of different things to try to fix it:   Memory scans -- no errors Motherboard BIOS -- I upgraded to the latest version of