"Lenovo - DDR4 - 4 GB - DIMM 288-pin Brand New Includes Three Year Warranty, The Lenovo 4X70K14183 is a ThinkServer 4 GB DDR4-2133MHZ ECC UDIMM RAM module keeps your ThinkServer operating at maximum performance and push the boundaries of productivity for all of your server applications such as virtualization, e-commerce and print services