I don't think the rest of the system matters if it was a true CPU benchmark. I suppose the motherboard MIGHT affect a little, but not much other than that.
The 5600/9600 are pretty simliar cards but this is the biggesr variance alone from the procs. What kinda threw me off is that the Celeron is a prescott core and one of the best Cellys available and it was only a few hundred points faster than an old p4 1.5
It was definitely better than the 5500 that thing was ****. It was a midrange card when it first came out, benchmarks for it are what I'd expect if you look on Toms Hardware or any place like that. But the 9600 was a faster card over all. Still, the Celeron with the slower gpu ended up being faster than the p4 system, that's what I'm saying...