Re: Over heating
Yes, always make sure it is very snug. Installing the heatsink usually is just that regardless the CPU type. I had to put quite a bit of pressure to get the heatsink to snap into the plastic clip for my Athlon 64. If it is loose, you know you didn't get it in all the way.
*Fact: Microsoft Window's Blue Screen of Death vs Computerforums.org's White Screen of Death. Which is worse?