AMD recently released two new Athlon II X4 CPUs : 638 and 641 .The CPUs are based on the Stars+/K10.5 architecture, but they lack GPU integration .Just like any other Llano CPU the socket is FM1. Here is a quick look at the specifications:

Specifications of AMD Athlon II X4 638 and 641
Model 638 641
Core/Thread Count 4/4 4/4
Base Frequency 2.7GHz 2.8GHz
L2 Cache 4MB 4MB
TDP 65W 100W
Price $81 $81

As these chips lack an integrated GPU, it is safe to consider them as low end SKUs in terms of price and performance. There is nothing extraordinary in the chips that would leave us dazzled.

It seems that AMD is following Intel’s footsteps.  Just like Intel, AMD is saving the A4, A6, A8 and FX brands (synonymous to Intel’s core i3, i5 and i7) for medium and high end chips, while they use Sempron and Athlon brand names (Celeron and Pentium in Intel’s case) for  low end SKUs .