Lenovo 4GB DDR4 2133Mhz. Brand New.. The Lenovo 4X70K09920 is a ThinkServer 4 GB DDR4-2133MHZ non-ECC DIMM 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. The ThinkServer DDR4 memory enables high input-output data transfer rates and reduced power consumption. Faster data rates mean higher performance. The DDR4 RAM module does not stra