DDR4 DIMM RAM is RAM for desktop PCs with a DDR4 motherboard. With extra DDR4 DIMM RAM, you can make your desktop faster and work smoothly with multiple programs or apps at the same time. There are different speeds that suit your work. With DDR4-2666 RAM you can smoothly work on your daily tasks and you can game smoothly with DDR4-3200, for example. Always choose the speed that's compatible with your motherboard. In addition, DDR4 RAM only works with a motherboard that supports DDR4.