I have Core Temp 1.0 installed and it shows the machine shooting straight up to 100 C unless I have a fan blowing across the back of the machine. I also have MacFan running and it shows the systems fans working at max speed as needed. So I'm very confused, because this doesn't seem to be a fan driver issue, and this does not happen in the Mac OSX partition. I'm also not necessarily pushing the machine very hard... When the fan is blowing across the back it stays cool though. Any help?