The AMD Athlon II X2 255 is the latest dual core Athlon II to be released.  Based on the Regor core, the Athlon II X4 255 has a clock speed of 3.1GHz with a 2000MHz HT link and memory support for both DDR2 (up to 1,066 MT/s) and DDR3 (up to 1,333 MT/s).   All these features the AMD Athlon II X2 255 comes with, priced at a low price of $74.99 shipped.  We are fortunate enough to have one here for some testing.