Computer Memory Solutions guarantees compatibility with models provided in description. Memory Type: SODIMM, 204-Pin Speed: DDR3-10600, 1333 MHz 2 Piece Kit Product appearance may vary. Picture for reference only. limited lifetime warranty when bought directly from computer memory solutions 2pcs of 4GB 1333MHz DDR3 Non-ECC CL9 SO DIMM. Genuine 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: 8 GB Sockets: 2 Sockets Max memory per socket is 4gb Compatible with: ASUS/ASmobile A53 Series A53E ASUS/ASmobile A53 Series A53SV ASUS/ASmobile A53 Series A53TA ASUS/ASmobile A53 Series A53U 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.