^agreed, do some basic troubleshooting with test-bench bare minimum setup before you proceed. any single component can cause issues like this, although your right i would most likely suspect motherboard.
Troubleshot - thinking it is the motherboard, time to turn to the warranty. Thinking vulgar words toward this model right now, I've read reviews of people getting this one DOA. or as I like to say DAMNED.
It isn't possible to ruin a processor by putting it in a bad mobo... is it?