This 32GB RAM is 100% compatible with the Lenovo System x3630 M4 (7158). 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. Memory slots without a processor should not be populated. A higher memory clock speed of the memory module will automatically adjust to the clock speed set by the system. This can especially be the case with larger capacities.