BARTON as for a few reasons.
Barton Cores do not heat up as bady at thoroughbred.
Barton Cores are also FSB333 and FSB400. THOROUGHBRED are only FSB266.
Finally (as I am looking at my AMD Pricing now), THOROUGHBRED are going to be EOL shortly. I have noticed that that :-
* ATHLON XP 2000+ BOX, 266MHz FSB THOROUGHBRED is End Of Life.
* ATHLON XP 2200+ BOX 266MHz FSB THOROUGHBRED is just hard to get.
* Leaving the ATHLON XP 2400+ BOX, 266MHz FSB THOROUGHBRED as the lowest Athlon CPU i can currently get my hands on.
* And for about another AU$20, I can get my hands on ATHLON XP 2600+ BOX, 333MHz FSB BARTON CPU. So why bother with playng purchasing So to be discontinued technology.