Hey Tejasvy!!!

In DDR3, auto-refresh and self-refresh are performed to refresh its content. Generally self refresh is used for low power consumption and DDR3 consumes low power than DDR2. The clock speed of DDR3 vary from 800 MHz to 2133 MHz.

In DDR4, only self-refresh is performed to refresh its content that’s why it consumes less power. The minimum clock speed of DDR4 is 2133 MHz and it has no defined maximum clock speed.

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