This 16GB (2x8GB) RAM is 100% compatible with the Dell Precision 5820 Tower (Intel Xeon CPU W-21xx).

Information on memory configuration: The following technical specifications should be considered in advance: RDIMM (Registered DIMM) or LRDIMM (Load Reduced DIMM) RAM can be installed in the device. LRDIMM memory is recommended when large memory capacities are required. RDIMM memory modules cannot be mixed with LRDIMM memory. If a memory upgrade is to be made with the existing RAM, it must be checked which memory technology (RDIMM / LRDIMM) is present. A higher memory clock of the memory module automatically adjusts to the memory clock specified by the system. This can especially be the case with larger capacities.