Debugging :: BSOD During Games / Multiple Error Codes - Memory Related?

The computer would just freeze up and not go to blue screen, However, since upgrading to Windows 8.1 it has been giving me a blue screen and error message, what could be wrong. I am positive the errors over the years have all been by the same, as what causes them and what occurs after is always the same.

After booting up, if I decide to play a game, practically any that require 3-d graphics, the game will start to slow down and the audio will start to crackle. Then, the computer will freeze up. When I ran Windows Vista it just stayed frozen, but now during Windows 8.1 it goes to blue screen and shuts off. After rebooting, everything runs perfectible normally and I can run any game perfectly without slowdown or freezing. Then, after shutting down and rebooting another day the same problem will arise.

It's not necessarily the worst error, but I don't quite like leaving my computer in sleep mode as it still drains some power. From what I gathered for Blue Screen View, it seems to be a memory issue. The first error code I received when using Windows 8.1 was PFN list corrupt. That prompted me to test and reseat the ram. Windows Memory Diagnostic came out clean, but the error persists. The latest time I have had this problem, the error was Memory Management, 0x0000001a.

I have updated the BIOS to latest version and have overclocked my RAM, however, the problem existed before O.C.