Product information: Athlon "Thoroughbred" XP 2100+ (Socket A) - OEMThis AMD Athlon XP 2100+ features the Thoroughbred core. It bring the Athlon manufacturing process from 0.18 micron down to 0.13 micron which lowers the voltage the CPU requires, the same change which resulted in the Pentium 4 'northwood' cores.
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