The Samsung 4GB 1Rx8 4GB PC3L-12800S M471B5173EBO memory module is a DDR4 RAM designed for use in computers. With a form factor of SO-DIMM, this module is compact and easy to install. The bus speed of PC3L-12800S-11-11-B2 ensures fast data transfer, making it an ideal choice for improving the performance of your computer. As a trusted brand like Samsung, you can rely on this memory module to enhance the speed and efficiency of your system.