I just replaced my E6320 with a Q6600. My system is running much slower than I expected. (I've run a Q6600 before, and it was very fast.) It appears to be running on only 2 cores. Task Manager shows only two processors. CPUZ shows 2 cores, and Device Manager shows only two E6320s (my old processor). I thought it would automatically recognize the new hardware and require me to do nothing. Do I need to uninstall the old CPU from the Device Manager? Thanks!