DDR4 memory is internal memory for computers that were made between 2014 and 2021 and have a motherboard that support it. Add extra DDR4 RAM to your laptop or desktop to make your computer faster. DDR4 is available in different speeds, such as DDR4 2133MHz or DDR4 2400MHz. Always choose the speed that suits your motherboard. There's also DDR4 laptop memory and DDR4 desktop memory.