Hel, I think I killed my weaker core on my core 2 duo. I tried overclocking a while w/ disastrous results (would not boot). Shortly after, I noticed something weird in cpu-z. It showed the operating frequency as 1600MHz, occasionally going up to it's proper 2400. I was concerned, but shrugged it off. But today durring chkdsk it was horribly sligish. I opened task amnager and saw that all the work load was concentrated in 1 core and my mouse was struggling tommove. So, is it dead? I'm pretty sure it is, but just wanted to check.