AMD's business CPUs will clock all the way to 2.9GHz. The slowest dual cores branded as Athlon X2 B21 will work at 2.7GHz and this is 2MB L2 CPU based on Regor 45nm dual core. Athlon X2 B23 will be the faster iteration of this CPU clocked at 2.9GHz. These CPUs will feature a TDP of under 65W.