Kingston KSM26RD8/16HDI ECC Registered RAM Memory CL19 DIMM, Capacity 16GB, 1 Module, Speed 2666MHz (PC4-21300), CAS Latency 19, FF DDR4, 2R (Dual Rank), 288 Pin, Memory Voltage 1.2v. Kingston Server Premier has been specifically developed for mission-critical server systems that require maximum uptime and stability.