The Sempron is a new product line, but regular TR readers will be familiar with the processors themselves already. The majority of Semprons, right now, are renamed Athlon XP processors with new model numbers and a slightly different mix of clock and bus speeds. Like the Athlon XP, these products drop into Socket A motherboards. They are, in fact, based on the Thoroughbred core, with 256K of L2 cacheor more accurately, they're most likely based on the revamped Thoroughbred B core, rebuilt for higher clock speeds. Other than the name, they're virtually indistinguishable from an Athlon XP.