AMD Quietly Rolls Out a Pair of Athlon II X4 Processors
The Athlon II X4 638 is a quad-chip with four processing threads clocked at 2.7GHz. It has 4MB of L2 cache, a TDP of 65W, and is priced at $81.
Interestingly, the 641 is also priced at $81, but is 100MHz faster at 2.8GHz. It has a comparably high TDP at 100W, which is something to consider if you're building a small form factor system or any type of setup that requires low power. Otherwise, the 641 boasts the same amount of L2 cache (4MB) along with identical core and thread counts.