In 2002 the Athlon XP-M (Mobile Athlon XP) replaced the Mobile Athlon 4 using the newer Thoroughbred core, with Barton cores for full-size notebooks.
In 2002, the Athlon XP-M (Mobile Athlon XP) replaced the Mobile Athlon 4, utilizing a newer Thoroughbred core for desktops and Barton cores for laptops.