that is so weird this is turning into one strange case of pc crashes.
so it looks like its just the game I have never seen that before I mean crash to desktop sure but not the system
Rereading this thread, I'd take the system out of the case, and run it on some cardboard and do some thorough one-by-one step troubleshooting. It makes absolutely no sense.
The only common thing left that would cause these kinds of fault is either a bad build, or psu. Being the fact you didnt report any issues for 3 weeks, then replaced the cpu I think that extra draw is just adding to the bad psu, or you didnt mount the cpu block properly.