DDR2 is a new memory standard approved by JEDEC (Joint Electronic Device Engineering Council) that comprises a great number of DIMM and chipset manufacturers. The standard's eariler versions were published back in March 2003, but it wasn't until January 2004 that it gained the ultimate approval and got the name of DDR 2 SDRAM SPECIFICATION, JESD 79-2, revision A (JESD79-2A). DDR2 is based on a well-known and time-proved DDR (Double Data Rate) technology. We can even say that it begins where the latter ends. In other words, first DDR2's will work at the frequencies that are the limit for this generation of DDR-400 (PC3200 standard, 200-MHz clock frequency), while its further variants will leave the latter even farther behind.



Link: Digit-Life