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Memory module installation rules

Memory modules must be installed in a specific order based on the memory configuration of the server.

The following illustration shows the location of the memory module slots on the system board.

Figure 1. Memory module slots on the system board
Memory module slots on the system board
Table 1. Memory module slots on the system board
1 Memory module slot 13 Memory module slot 3
2 Memory module slot 24 Memory module slot 4

Independent mode​

This server supports independent mode only.

Independent mode provides high performance memory capability. You can populate all channels with no matching requirements. Individual channels can run at different DIMM timings, but all channels must run at the same interface frequency.

Make sure to adhere to the following rules:

  • All memory modules installed should be identical in type and capacity.

  • Do not mix memory modules with different voltages.

  • Do not mix low-voltage and regular UDIMMs. (2R memory module only)

For a list of supported Memory module slot options, see: Lenovo ServerProven website

Table 2. Memory module installation rules and order for Independent Mode
Total memory modulesMemory channel A Memory channel B
Slot 1Slot 2 Slot 3Slot 4
1V    
2*V  V 
4†VV VV
* See the following for the maximum memory speed supported:

  • Maximum memory speed supported by same memory capacity:

    • Xeon® E3–23XX: up to 3200 MT/s

    • Pentium Gold: up to 2666 MT/s

† See the following for the maximum memory speed supported:

  • 8GB 1Rx8 DIMM

    • Xeon® E3–23XX: up to 3200 MT/s

    • Pentium Gold: up to 2666 MT/s

  • 16GB 2Rx8

    • Xeon® E3–23XX: up to 2933 MT/s

    • Pentium Gold: up to 2400 MT/s