Dell EMC PowerEdge R840 Installation and Service Manual

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System memory

Your system contains 48 memory sockets split into four sets of 12 sockets, one set per processor. Each 12-socket set is organized into six channels. Six memory channels are allocated to each processor. In each channel, the release tabs of the first socket are marked white, and the second socket black.

Figure 1. Memory socket locations
This images shows the memory socket locations.

Memory channels are organized as follows:

Table 1. Memory channelsThis tables describes memory channels and how the channels are organized.
ProcessorChannel 0Channel 1Channel 2Channel 3Channel 4Channel 5
Processor 1Slots A1 and A7Slots A2 and A8Slots A3 and A9Slots A4 and A10Slots A5 and A11Slots A6 and A12
Processor 2Slots B1 and B7Slots B2 and B8Slots B3 and B9Slots B4 and B10Slots B5 and B11Slots B6 and B12
Processor 3Slots C1 and C7Slots C2 and C8Slots C3 and C9Slots C4 and C10Slots C5 and C11Slots C6 and C12
Processor 4Slots D1 and D7Slots D2 and D8Slots D3 and D9Slots D4 and D10Slots D5 and D11Slots D6 and D12

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