Samsung DDR4-2133 16GB/2Gx72 ECC/REG CL15 Server Memory (M393A2G40DB0-CPB0) Samsung DDR4 Registered DIMMs (or RDIMMs) are designed with an additional hardware register between the DRAM module and the systems memory controller RDIMMs are often the default choice for deployment in server-class computing systems. Samsung DDR4 memory is available as Registered DIMM that it provides an optimized solution for highly virtualized environments, high-performance computing and networking Semiconductor modules of Samsung DDR4 are designed with new system circuit architecture to deliver higher performance with low power requirements Doubled bandwidth, along with reduced voltage and dramatically lower power consumption, improves performance and optimizes the total cost of ownership.