Memory mirroring mode: Installation guidelines and sequence

Memory module installation order for memory mirroring with two processors installed in a compute node.

The following illustration shows the location of the DIMM connectors on the system board.
Figure 1. The location of the DIMM connectors on the system board
The location of the DIMM connectors on the system board
See the following table for memory channels and DIMM slots information around a processor.
Table 1. Memory channels and DIMM slots information around a processor
Integrated Memory Controller (iMC) Controller 0 Controller 1 Controller 2 Controller 3
Channel Channel 0 Channel 1 Channel 0 Channel 1 Channel 0 Channel 1 Channel 0 Channel 1
DIMM connector (Processor 1) 2 1 4 3 7 8 5 6
DIMM connector (Processor 2) 15 16 13 14 10 9 12 11

Memory mirroring mode — DIMM installation guidelines

  • Memory mirroring can be configured across memory channel 0 and memory channel 1.
  • The total memory capacity of memory channel 0 must equal to that of memory channel 1.
  • Populate both memory channel 0 and memory channel 1 of each memory controller.
  • For the memory-mirroring mode, ThinkSystem SD630 V2 Compute Node only supports the memory configuration with 16 DIMMs. Populate all of the DIMM slots with DIMMs that are identical in capacity and architecture.

Memory mirroring mode — DIMM population sequence

Note:

When adding one or more DIMMs during a memory upgrade, you might need to remove some DIMMs that are already installed to new locations.

Table 2. DIMM population sequence in the memory mirroring mode
Total Processor 1 Processor 2 Total
DIMMs 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DIMMs
161 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 16
Note:
  1. DIMM configurations that support Sub NUMA Clustering (SNC), which can be enabled via UEFI.