This 128GB (4x32GB) RAM is 100% compatible with the Oracle Sun 1042G-TF. Information regarding 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 required. The different memory technologies (ECC/RDIMM) must not be mixed. If a memory expansion is to be made with the existing RAM, it must be checked which memory technology (ECC/RDIMM) is present. Memory slots that do not have a processor should not be populated. When using a multiprocessor system, the memory slots should always be populated identically for each CPU. 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.