DDR2 SDRAM

DDR2 (Double Data Rate 2) by SDRAM JEDEC (electronic equipment engineering joint committee) of development of Cenozoic technical standards, it and memory generation on the DDR memory technical standard is the biggest different, even though with is adopted in the clock's increase/decrease delay at the same time for Data transmission DDR2 memory, but the basic way but has twice the generation on the DDR memory to proofread take ability (i.e., 4bit Data read prefetching). In other words, DDR2 memory each clock to 4 times external bus speed read/write data and can build on internal control bus four times as much speed.