AddOn 16GB PC4-17000 DDR4-2133MHz Registered ECC CL15 288-Pin DIMM 1.2V Dual Rank Memory Module. Enhance your server’s performance with the AddOn 16GB DDR4-2133MHz Registered ECC Memory Module. Designed for reliability and efficiency, this module features Dual Rank technology, operates at 2133MHz, and supports ECC for error-free data integrity. It’s ideal for demanding server applications requiring robust performance and stability.