Hey chaps, I've got an E6400 and I get times when certain things seem to use it all up, for example, at the moment I'm ripping a DVD and my music just went crazily slooowww like some funky effect. I tried setting the ripper to use core 1 and itunes to use core 0 but that didn't make a difference. It also slows down when say installing something of a CD, like a game. There must be something wrong because my AMD 3000 didn't have trouble with these sorts of tasks...
Cheers.