AMD Duron 1.6 - 1.8 GHz with 266 MHz FSB
Athlon XP Palomino Core: 1500+ - 2100+ with 266 MHz FSB
Athlon XP Thoroughbred Core: 1700+ - 2700+ with 266/333 MHz FSB
Athlon XP Barton Core: 2500+ - 3200+ with 333/400 MHz FSB
AMD Sempron 3000 + and up
I'm going to upgrade the processor in an old machine I have laying around and figured I would ask for your guys input.