Plugging rules for memory modules in the 9040-MR9 system

Find information about the configurations and rules that apply to memory modules for the IBM® Power® System E950 (9040-MR9) server.

This information describes the rules for memory modules in the system.
  • The system supports DDR4 memory modules of 8 GB, 16 GB, 32 GB, 64 GB, and 128 GB.
  • The system has eight memory riser cards.
  • Each memory riser card must have 8 DIMMs.
  • Each system processor must have one memory riser card.
  • Unused memory module connectors must have a memory module filler.
  • Unused memory riser positions must have a memory riser filler.
  • A memory riser card can have up to 16 DIMMs.
  • Each system processor can have two memory riser cards.
  • All memory modules must be of the same size and type on each memory riser.
  • The memory module connector colors are black and white. The first eight memory modules must be installed in the white-colored DIMM connectors.
  • If the memory riser cards for the processors have different capacities, populate the largest memory riser card with system processor CP0.
  • Consider the following requirements when you add memory riser cards:
    • After all of the first memory riser cards for the system processors are filled up, add a second memory riser card to system processor CP0. The second memory riser card of each system processor can have different memory module capacities from the memory module capacity of the first memory riser card. It is recommended that the memory modules of the second memory riser card have the same type and size as the first memory riser card.
    • Add a second memory riser card to system processor CP1, then to system processor CP2, and finally to system processor CP3.