We guaranty this kit will work in your machine. 4pcs. 8GB DDR3L, 1600MHz, ECC, CL11, 2R, X8, 1.35V, Unbuffered, DIMM, 240-pin Lifetime exchange or repair warranty against manufacturing defects. by Computer Memory Solutions Manufactured by Computer Memory Solutions Compatible with: Lenovo ThinkServer TS440 Manufacturing part numbers 70ALxxx; 70AMxxx; 70ANxxx; 70AQxxx Max Memory: 32 GB Sockets: 4 Sockets