Double Data Rate Random Access Memory(DDR-RAM, DDR-SDRAM ...Synchronous...) {RAM} that transfers data on both 0-1 and 1-0 {clock} transitions, theoretically yielding twice the data transfer rate of normal RAM or {SDRAM}. {DDR-RAM Article (http://www.pcreview.co.uk/Article.php?aid=9)}. {DDR-SDRAM Article (http://www4.tomshardware.com/mainboard/00q4/001030/)}. (2001-05-24)