I'm running Bitcoin on a Dell laptop with an Intel i7 CPU. OS is Ubuntu 64 bit.
I deleted the contents of .bitcoin and copied a new wallet.dat. After downloading about 50,000 blocks the computer shuts down and I get a bios message saying "warning: CPU temperature has exceeded 90 degrees".
The funny thing is that this only happens when downloading the blockchain. I can generate coins for days, even at 100% using all 8 CPU cores, and the computer doesn't overheat.
Seems like a peculiar behaviour. I have used a lot of computationally intensive software before, but I've never managed to fry the CPU like this. What might be going on?
Perhaps the airflow passes over the harddisk before it reaches the CPU, and the disk is getting hot due to lots of activity? Hotter air for CPU cooling makes CPU cooling less effective, and it may overheat. A lot of I/O may also make your chipset hotter than usual. Do you have the latest BIOS firmware installed, btw?