You need a mother board that supports DDR to use it. Maybe normal motherboards support it, but they wont take advantage of it. DDR is supported by the AMD 760 chipset and the Via's next iteration of the KT133 (KT133a?). Some motherboards with the 760 have been released, and the reviews show that there is a significant performance increase. Of course, to really make of the DDR memory and the motherboard, you would need the new AMD processors that support 266MHz FSB.