@PanicProne:

I guess you're username is fitting.

Seriously now, don't you think it's possible something in your setup is triggering the problem? Because this is definitely not a widespread issue, so the possibility of you getting 2 similarly fault boards is very slim. I'm not saying it is your fault at all, just that some variable particular to your use maybe related to the problem. Can you tell us more about your system? Have you tried swapping your PSU? You got me really curious, and quite a bit scared since if my 2500K/board fries I'd be months without a replacement