DDR2 memory is the next generation of DDR memory that supports the open standards efforts of the Joint Electronic Device Engineering Council (JEDEC), the governing body for integrated circuit specifications. It uses an advanced signaling scheme that can offer higher data transfer rates than DDR1 memory. The advanced signaling scheme mentioned above allows high transfer rates using traditional PC motherboard manufacturing techniques. DDR2 benefits to customers include lower voltage and higher frequency headroom than DDR1 memory.
Socket AM2 processors from AMD will support DDR2 speeds of 400MHz, 533MHz, 667MHz and, for AMD Athlon™ X2 dual-core and AMD Athlon™ FX dual-core processors, 800MHz.