16GB Total memory using 2pc of 8GB DDR4, 2133MHz, Non-ECC, CL15, 2R, X8, 1.2V, Unbuffered, DIMM, 288-pin Lifetime warranty for exchange. by Computer Memory Solutions Brand Computer Memory Solutions We don't use Generic modules to avoid incompatibility issues. Guaranteed to work or you get all of your money back including shipping. MAX MEMORY 32 GB SOCKETS 4 OR 2 COMPATIBLE WITH HP/Compaq ProDesk 400 G 2.5