I think he was referring to the 800MHz FSB. Anyway, I don't see how the 6300 would be an upgrade from the 4500, it has a slower stock clock, though it does have a faster FSB. I'd look at maybe the E7500 at ~$115, alternatively there is the Q8300 at ~$150, the quad will probably not be better at most current games, but will be an improvement in threaded aps (a common example being many video encoders) And will be better if and when games become better threaded. going to a 6MB dual seems to increase the price by much more than the performance would justify. all IMO of course.