My P4 3.4Ghz Pressy does everything I could ask it to. I guess if you look at a comparison of (Gaming Benchmarks) a single core AMD will look much more attractive, (numbers).
Overall, my P4, X800XT PE & 2GIG of DDR3500... Play every game at their highest settings... with good frame rates.
One exception would be FEAR. I can't get FEAR to run good at all.