16GB Total memory using 2pc of 8gb DDR4, 2133MHz, Non-ECC, CL15, 1R, X8, 1.2V, Unbuffered, DIMM, 288-pin Lifetime warranty for exchange Computer Memory Solutions Brand Computer Memory Solutions Guaranteed to work or you get all of your money back including shipping. Compatible with Dell XPS 8900 Desktop / Special Edition MAX MEMORY 32GB SOCKETS 4