AddOn 16GB PC4-17000 DDR4-2133MHz Registered ECC CL15 288-Pin DIMM 1.2V Dual Rank Memory Module. This AddOn memory module, model offers 16GB capacity with DDR4-2133MHz speed. It features Registered ECC (Error-Correcting Code) support, CL15 latency, and operates at 1.2V. Designed as a 288-pin DIMM, it supports dual rank configurations, making it ideal for high-performance server applications requiring reliable memory performance.