It will be somewhat dependent on the motherboard and, if a pre-built OEM, the make model, but generally any DDR3 1066MHz to 1600MHz RAM will work with the Athlon IIs.
It will be somewhat dependent on the motherboard and, if a pre-built OEM, the make model, but generally any DDR3 1066MHz to 1600MHz RAM will work with the Athlon IIs.