From AMD.com
Valid Models -
Barton
2500+
2600+
2800+
3000+
3200+
and up
Thoroughbred
1700+
1800+
1900+
2000+
2100+
2200+
2400+
2600+
2700+
2800+
"Differences Between "Palomino", "Thoroughbred", and "Barton" Processors"
Palomino, Thoroughbred, and Barton are internal code names for different revisions of the AMD Athlon™ XP processor. Palomino refers to the original AMD Athlon XP processor (Model 6), while Thoroughbred (Model 8) and Barton (Model 10) refer to subsequent revisions of the AMD Athlon XP processor. The differences between these processors are detailed in the table below.
The Palomino, Thoroughbred, and Barton processors may be differentiated by their ordering part numbers (OPN). The Palomino's OPN is located on the processor die, and begins with the letters "AX" (e.g., "AX2100DMT3C"). The Thoroughbred's and Barton's OPNs are located on black labels on the processors' packages (not on the die) and begin with the letters "AXDA" (e.g., "AXDA3000DKV4D"). The Thoroughbred can be distinguished from the Barton by the alpha-numeric character that is second from the end of the OPN. A "3" represents the Thoroughbred's 256KB L2 cache, while a "4" represents the Barton's 512KB L2 cache (e.g., "AXDA2700DKV3D" would be a Thoroughbred, "AXDA3000DKV4D" would be a Barton).
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