Despite of introduction of new "A-Series" and other "-Series" families, the company continued to use "Athlon II" and "Sempron" names for "Llano" products, that didn't have on-chip GPU. The first Athlon II branded Llano model for socket FM1, quad-core 631 with 2.6 GHz frequency, was launched last summer. It was followed by Athlon II 651 in November. Yesterday AMD added another two Athlon II CPUs to AMD product database. The processors are Athlon II X4 638 and 641. Today Athlons were added to official pricelist.

Athlon II X4 641 was spotted last August in CPU support list on Biostar website. This SKU has 4 cores, clocked at 2.8 GHz. Each core integrates its own 1MB L2 cache, and the chip comes with standard features for K10 generation of CPUs: SIMD support up to SSE3, AMD64, Enhanced Virus protection, and Virtualization. The CPU has 100 Watt TDP, and works in socket FM1. At this time boxed version of X4 641 is available for pre-order from Provantage and a few other US online stores. Pre-order prices for this Athlon II are in the $90 - $95 range. Official price for AMD 641 is $81.

Like model 641, AMD Athlon II 638 is a quad-core CPU with 4 MB L2 cache. This previously unknown model operates at 2.7 GHz, and it fits into 65 Watt power envelope. Other characteristics of this SKU are identical to Athlon II 641. The processor is not yet available in stores. The Athlon II 638 is priced at $81.