Re: SuperPi CPU benchmark
It's 2.4ghz for the 4800. Not sure for the 4400.
I'm not totally sure on the single versus dual. I did have a 4000+ (single core) in my 2nd system for a while running at 2.4ghz as well. The 4800+ in that system made a noticeable difference but it was mainly in windows. The system is much snappier and responsive. In actual games, there is sometimes an increase in performance but it's usually around 10fps or less (so I'm not sure I'd notice without running fraps to see the actual framerates).