Lenovo 4GB PC4-17000. Component for: PC/server, Internal memory: 4 GB, Memory layout (modules x size): 1 x 4 GB, Internal memory type: DDR4, Memory clock speed: 2133 MHz, Memory form factor: 288-pin DIMM, ECC

Lenovo 4GB DDR4 2133Mhz Non ECC UDIMM Memory (4X70K09920)
Adding more memory increases system performance. This Lenovo 4GB DDR4 2133Mhz Non ECC UDIMM Memory are low power, high-speed operation memory that use DDR4 SDRAM devices, allows you to upgrade your system’s performance and enhance its ability to run more programs simultaneously. Test-proven 100% compatibility listed for supported systems.