what is the difference between ddr1 and ddr2 and ddr3

Answer Posted / manshila

DDR- Works at 2.5 V, Has latency CL-3, Transfers 2 bits per clock cycle, located on mother board, has 184 pins, uses TSOP packaging.
DDR2-Works at 1.8V, Has latency CL-5, can transfer 4 bits in the same clock cycle as of DDR, located inside memory chip - On die termination, has 240 pins.
DDR3- works at 1.5V, Has latency CL-7, Transfers 8 bits in the same clock cycle as provided to DDR, located inside memory chip - ODT, has 240 pins but notch placed at different position

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