It's hard to fry the CPU nowadays unless you're going for "suicide runs" and it heats up or you apply too much voltage... And by only increasing it by 200mHz, and not increasing any voltage, I'm going to doubt you fried it. I've had unstable OC's before and had to reset by BIOS because of it, so I'm sure your CPU is fine. I'm not really sure how much this guy knows about computers...but he seems to be a bit misinformed...