The Phenom II X2 550 Black Edition is AMD's first dual-core Phenom
processor, and thanks to an unlocked multiplier and 45nm manufacturing process, it has the potential to break some serious overclocking records... This 3.1GHz CPU slips easily into socket AM3 motherboards and Socket AM2+ platforms as well. This is largely due to its integrated DDR2/DDR3 memory controller, which functions in DDR3 mode for AM3 motherboards, and DDR2 mode on socket AM2/AM2+ motherboards.