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This isn't technically true to be honest. The -only- difference between an MP and an XP chip is that AMD has severed a line on the XP chips that would allow them to operate as a dual+ cpu. Simply using a metallic paint or pen and filling in the gap allows it to function exactly the same. You could purchase two Athlon XP 2000+ processors for maybe $70 each, fill in the gaps with whichever substance you end up using, and voila, you have a dual processor computer for maybe 1/5 of the cost. If you are interested in finding even more information on this, take a quick google search for 'converting amd xp to mp' or something along those lines. There's a number of tutorials out on the web to do this.