I got bit by this when I used CPU-Z to find the VID for my chip on auto. I didn't look close so when I started my OC experiment I was a little low on the volts!
Once I figured out that it was taking it easy I loaded up Prime95 and looked again... volts were a bit higher that time.
I have not finished playing around, but OCing is a fine art from what I have read, so I will take my time and not blow anything up.