I recently upgraded to the Dual Core 2 2.13Ghz processor. It seems to me it is running slow when I have a couple of things running. Example, if I am unzipping something and then try to do something else it seems sluggish to me. I have 2 gigs of 667mhz ram. I think that is good enough. I guess I am not blown away with this supposed great speed that comes with Dual core processors. Any advice as to what I could be missing.