General DIMM slot population guidelines

Observe the following guidelines for all AMP modes:

• Install DIMMs that are optimized for the installed processor.

  To identify the processor type installed in the server , use the BIOS/Platform Configuration (RBSU) of the UEFI System Utilities .

• Install DIMMs only if the corresponding processor is installed.
• Do not mix LRDIMMs and RDIMMs.
• White DIMM slots denote the first slot of a channel (Ch 1-A, Ch 2-B, Ch 3-C, Ch 4-D).
• When only one processor is installed, install DIMM s in sequential alphabetic order: A, B, C, D, E, F, and so forth.
• When two processors are installed, install the DIMMs in sequential alphabetical order balanced between the two processors: P1-A, P2-A, P1-B, P2-B, P1-C, P2-C, and so forth.
• When single-rank, dual-rank, and quad-rank DIMMs are populated for two DIMMs per channel, always populate the higher number rank DIMM first (starting from the farthest slot). For example, first quad-rank DIMM, then dual-rank DIMM, and then lastly single-rank DIMM.
• DIMMs should be populated starting farthest from the processor on each channel.

For more information about server memory, see the Hewlett Packard Enterprise website.