Crucial 16GB Kit (4GBx4) DDR4 2133 MT/s (PC4-2133) CL15 SR x8 ECC Registered DIMM 288-Pin Server Memory CT4K4G4RFS8213 Increased memory bandwidth Reduce power consumption Premium quality memory from a trusted brand Limited Lifetime Warranty, 100% Tested Identical to model number: CT4C4G4RFS8213