8GB Total memory using 1pc of 8GB DDR3, 1600MHz, Non-ECC, CL11, 1R, X8, 1.5V, Unbuffered, DIMM, 240-pin Two 240-pin DDR3 DIMM sockets Supports the following: PC3-12800 (DDR3-1600) 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. Expansion: 2 Sockets Maximun Memory: 16GB Compatible with: Lenovo H Series Desktop H50-50