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#11
If it was running fine at 4.7xxGHz and you bumped it up to 4.8xxGHz and that is when the problem started, I would say that is the problem. Also, the default settings for IntelBurnTest is 10 passes(or it was for me), you might try that. I've read that is the least amount of passes you should run, and set it on Standard or better. That addresses the stability of the CPU, but not the CPU and GPU's together. I would probably take it back to your last stable OC and see if you still have the problem. That small bump up in frequency isn't the difference between your PSU being enough and not being enough.