(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)