1 SINGLE PC OF 8GB DDR3L, 1600MHz, Non-ECC, CL11, X8, 1.35V, Unbuffered, SODIMM, 204-pinGenuine CMS brand, CMS is one of the most trusted names in the Computer Memory industry and this product carries a Lifetime Warranty from CMS. Max Memory: 8GB Sockets: 1 Compatible with: ASUS/ASmobile A Series Notebook A450LD-WX056H If 4GB is installed, the recognized memory may be reduced to 3.5GB or less (depending on system configuration and memory allocation). Maximum configurations require a 64-bit operating system.