AddOn 16GB PC4-17000 DDR4-2133MHz ECC Registered CL15 288-Pin DIMM 1.2V Dual Rank Memory Module. This AddOn memory module, model, offers 16GB of DDR4-2133MHz ECC Registered RAM. It features CL15 latency and operates at 1.2V. Designed with 288-Pin DIMM form factor, it supports dual rank configurations, making it ideal for servers and workstations requiring reliable performance and error correction.