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#11
Honestly sounds to me like an overheating GPU. Don't let the fan run at automatic. Make sure you set the fan speeds manually and run a faster fan speed when playing games. I have an XFX R9 390X 8GB that while playing certain games will run hot. If I leave the fan on automatic the computer will lock up like you said yours does. I have to set my fan manually at 90% when I start certain games. Try the fan thing first. You can also take the side panel off of your computer case for a while just to test the heat theory. But I bet your issues are a problem with GPU heat.