As far as I know, XP Pro (configured for best performance) is faster than 2000 Pro. Don't know about XP Home - don't use OSs that can't recognize multi-processors. Time to upgrade that dual mobo, BGFT! :) I'm on a dual Xeon 2.66GHz and it rips apart my dual 1GHz PIII - now used as a Web/FTP server. ;0) There is also a website that tells you which Services may be safely disabled to enhance performance. Don't remember the site, but it's been a regular mention on TechTV's The Screensavers.

C makes it easy to shoot yourself in the foot. C++ makes it harder, but when you do, you blow your whole leg off.

 -- Bjarne Stroustrup

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