DDR memory is available in different versions such as DDR1, DDR2, DDR3, DDR4, and DDR5. DDR memory is available in different versions such as DDR1, DDR2, DDR3, DDR4, and DDR5 . Each version has different specifications such as clock speed, voltage requirements, and maximum bandwidth . For example, DDR4 memory has a maximum bandwidth of 25.6 GB/s at 3200 MHz and requires a voltage of 1.2 V 2.