COMPATIBLE WITH: HP TouchSmart 520-1139d, 520-1149d, 520-1175a 520-1180a 16GB TOTAL MEMORY CONSISTING OF 2PC OF 8GB 1333MHz DDR3 Non-ECC CL9 SO DIMM. This systems can use 1333 or 1600mhz Manufactured by Computer Memory Solutions We don't use OEM or Generic Modules to avoid incompatibility. Lifetime warranty by Computer Memory Solutions 30 day money back guarantee.
Max Memory: 16GB
Sockets: 2 Dual channel memory architecture Two DDR3 SO-DIMMs (204-pin) sockets PC3-10600 (DDR3-1333) PC3-12800 (DDR3-1600) Supports 1 GB, 2 GB, 4 GB and 8 GB (8 GB only available on systems using Ivy Bridge processors) DDR3 SO-DIMMs Supports up to 16 GB on 64-bit PCs (16 GB only available on systems using Ivy Bridge processors) Supports up to 4 GB on 32-bit* PCs *32-bit PCs cannot address a full 4.0 GB of memory.