This 8GB RAM is 100% compatible with the Lenovo ThinkStation D30 (4223).

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 desired. The different memory technologies (ECC / RDIMM) should 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 currently in use. Memory slots without a processor present must not be populated. A higher memory clock of the memory module will automatically adjust to the memory clock specified by the system. This can especially be the case with larger capacities.