OverclockersClub posted an review about ABIT's KG7-Raid mobo. They say that The basic idea behind DDR SDRAM is that you take a normal SDRAM module and redesign it to be able to send data on the rising and falling edge of each clock. Instead of running the SDRAM twice as fast, which is an exceedingly difficult task, you enable it to send data twice as fast, a less difficult task, thereby providing about twice the theoretical maximum memory bandwidth.
and much more. Warp over for the full review