Okay, so I have a fx-8320 overclocked to 4.2ghz (on an 8 hour stress test it performed fine and its temps were a steady 68 degrees Celsius) 8gb of hyper-x RAM (2x4gb) and a EVGA gtx760 overclocked edition. My system has been running perfectly fine for a while, that is until I booted up my newly steam installed version of Metro 2033. After launching the game it started in an odd resolution so I went into the settings and changed it to 1920x1080p while changing from high settings to ultra and changing from direct x 9 to direct x 11. After doing so I backed out of the settings menu, upon doing so my pc immediately crashed. It still had power (fans, lights, etc. still on) but all ports shut off (mouse, keyboard, audio, and monitor). Not knowing what had happened i was forced to turn off my pc. Upon boot my system was super unresponsive and windows explorer began crashing immediately (could not open folders, launch chrome, etc.) SO, I am sure you can understand my concern. It ran completely fine and certainly has the hardware to support good performance, but after changing those settings and crashing my system is completely unstable. I am currently typing this out in safe mode, through which my pc runs fine. Can anyone suggest any fixes ?