DDR-2 SDRAM is the second generation of DDR SDRAM. It offers data rates of up to 6.4 GB/s, lower power consumption, and improvements in packaging. At 400 MHz and 800 Mb/s, DDR-2 increases memory bandwidth to 6.4 GB/s800 percent more than original SDRAM. DDR-2 SDRAM achieves this higher level of performance and lower power consumption through faster clocks, 1.8-V operation and signaling, and simplification of the command set. The 240-pin connector on DDR-2 is needed to accommodate differential strobes signals (Figure 13).
Information porvided by Hewlett-Packard Development Company, L.P.
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