The Samsung 8GB DDR4 2666 PC4-21300 1Rx8 SODIMM Laptop Memory RAM M471A1K43DB1-CTD is a high-quality memory module designed for laptops. With a total capacity of 8GB and a single rank x8 configuration, this DDR4 SDRAM module offers fast data access and transfer speeds at a frequency of 2666MHz. The non-ECC unbuffered memory features ensure reliability and stability, while the lifetime manufacturer warranty guarantees long-lasting performance. Made by Samsung in the United States, this memory module is a dependable choice for upgrading your laptop's memory capacity.