This 8GB RAM is 100% compatible with Intel S5520URR.

Information on memory configuration: The following technical specifications should be considered in advance: ECC DIMM (with Error-Correction-Code) or RDIMM (Registered DIMM) RAM can be installed in the device. RDIMM memory is recommended when large memory capacities are to be achieved. The different memory technologies (ECC / RDIMM) must not be mixed. If a memory upgrade is to be made with the existing RAM, it must be checked which memory technology (ECC / RDIMM) 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. Memory slots without a processor present must not be populated.