Major differences between DDR and DDR2
“Double Data Rate, Two” or simply, DDR2, is an extension of a system’s standard DDR memory. Like DDR, DDR2 transfers data on both edges of the system clock, which allows the bandwidth of the memory to equal twice that of Single Data Rate memory, or SDRAM. DDR2’s architecture is intended to increase efficiency and performance over its predecessor, DDR.
* DDR’s standard voltage setting is 2.5 V, while DDR2’s voltage setting is 1.8 V.
* DDR2 memory is DDR2’s 4-bit data pre-fetch. DDR has two sets of data that are read and written to the memory core, while DDR2 allows for four sets of data to be processed.
Read the complete article @ http://www.theitstuff.com/hardware/intel-hardware/major-differences-between-ddr-and-ddr2/
“Double Data Rate, Two” or simply, DDR2, is an extension of a system’s standard DDR memory. Like DDR, DDR2 transfers data on both edges of the system clock, which allows the bandwidth of the memory to equal twice that of Single Data Rate memory, or SDRAM. DDR2’s architecture is intended to increase efficiency and performance over its predecessor, DDR.
* DDR’s standard voltage setting is 2.5 V, while DDR2’s voltage setting is 1.8 V.
* DDR2 memory is DDR2’s 4-bit data pre-fetch. DDR has two sets of data that are read and written to the memory core, while DDR2 allows for four sets of data to be processed.
Read the complete article @ http://www.theitstuff.com/hardware/intel-hardware/major-differences-between-ddr-and-ddr2/