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Which of the following are the differences between DDR3 SDRAM and DDR2 SDRAM? DDR3 transfers data at twice the rate of DDR2. DDR3 uses 240-pin connections and DDR2 uses 120-pin connections. DDR3 memory power consumption is 30% less as compared to DDR2. DDR3 transfers data on a 64 data bits wide bus and DDR2 transfers data on a 128 data bits wide bus.

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Answer:

DDR3 SDRAM having twice rate of data transferring as compared to DDR2 SDRAM both have 240 pin connection. DDR3 memory power consumption is 40 % less as compared to DDR2. both are transfers data on a 64 data bits wide bus. The physical difference occur in both type a cut is present at bottom along pin in DDR2 it is occur probably in center and In DDR3 it is occur at left  through center.

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