General Memory Module Installation Guidelines - Dell EMC PowerEdge R940 Installation And Service Manual

Figure 52. Memory socket location on the processor expansion module
Memory channels are organized as follows:
Table 38. Memory channels
Proces Channel 0
sor
Proces Slots A1 and A7
sor 1
Proces Slots B1 and B7
sor 2
Proces Slots C1 and C7
sor 3
Proces Slots D1 and D7
sor 4

General memory module installation guidelines

NOTE: If your system's memory configurations fail to observe these guidelines, your system might not boot, might stop
responding during memory configuration, or might operate with reduced memory.
The system supports Flexible Memory Configuration, enabling the system to be configured and run in any valid chipset architectural
configuration. The following are the recommended guidelines for installing memory modules:
• RDIMMs and LRDIMMs must not be mixed.
• Up to two RDIMMs can be populated per channel regardless of rank count.
Channel 1 Channel 2
Slots A2 and A8 Slots A3 and A9
Slots B2 and B8 Slots B3 and B9
Slots C2 and C8 Slots C3 and C9
Slots D2 and D8 Slots D3 and D9
Channel 3 Channel 4
Slots A4 and A10 Slots A5 and A11
Slots B4 and B10 Slots B5 and B11
Slots C4 and C10 Slots C5 and C11
Slots D4 and D10 Slots D5 and D11
Installing and removing system components
Channel 5
Slots A6 and A12
Slots B6 and B12
Slots C6 and C12
Slots D6 and D12
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