The Sempron is basically an AthlonXP ?Thoroughbred? chip re-badged, this means that it has slightly lower performance than the Athlon XP Barton (Caused mainly by the lesser cache on the Sempron - 256k level 2 cache vs. 512k on the Barton). The model numbers also vary slightly from the Thoroughbred cores of old. AMD have based their Sempron model numbers on the performance of the chip in several benchmarks when compared to other Sempron processors. These benchmarks include Sysmark 2004 and Content Creation Winstone.