Introduction of new DRAM Generation: DDR3

When compared to the DDR2, the new generation, DDR3, delivers more advantages. First, it is equipped with the 8-bit prefetch design, with a computing speed of 800-1600MHz, which doubles the DDR2 using the 4-bit prefetch design with a computing speed of 400-800MHz. Second, the voltage of DDR3 is controlled at 1.5V, which saves more energy than the DDR2 at 1.8V. Third, the ASR (automatic self-refresh) design is applied to the DDR3 to lower the die temperature by reducing the refreshing frequency without sacrificing data transfer reliability. When comparing the DDR3-800, DDR3-1066 and DDR3-1333 with the DDR2-800, the average power consumption of the DDR3 modules is reduced by 25%, 29% and 40% respectively.

Comparison of DDR, DDR2, DDR3