Just an aside: the new PIII 1 GHZ processors test much better than Athlons, BUT are in VERY scarce demand (thus high prices, if you can find them). Between 600 and 1 GHZ, Athlons are faster processors, and in general a better choice, and are easier to locate - however, athlons have been going UP in price due to demand. I've been trying to get a 550 PIII to replace my 266 PII for months now, but none have been available, or when they were it was "pulled" CPUs, removed from the casing etc. I don't think this is a good time to upgrade, actually; it might be best to wait a few months to see how prices will settle and if Intel has fixed it's supply problems...