Short for
Double Data Rate-Synchronous DRAM, a type of
SDRAM that supports data transfers on both edges of each clock cycle (the rising and falling edges), effectively doubling the memory chip's data throughput. DDR-SDRAM also consumes less power, which makes it well-suited to
notebook computers. DDR-SDRAM is also called
SDRAM II. and
DDRAM.
Also see the
Guide to System Memory page in the
Quick Reference section of
Webopedia.
