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The system memory contains 96 memory sockets organized into eight memory risers, split into four sets of two risers per processor. Each
memory riser has:
•
12 DIMM sockets arranged into four channels. In each channel, the release levers of the first socket are marked white, the second
socket black, and the third socket green.
•
Two Scalable Memory Interconnect-2 (SMI-2) ports that help DIMMs to connect with the processor.
•
Two Scalable Memory Buffers (SMB) that provide access to the DIMMs.
NOTE:
GT/s indicates memory bus speed in GigaTransfers per second.
SMI-2 ports operate in two modes:
•
Performance Mode (2:1) up to 3.2 GT/s for higher bandwidth
•
Lock Step Mode (1:1) up to 1.87 GT/s for higher DDR4 speeds and better RAS (Reliability, Availability, and Serviceability) features
The maximum memory that is supported on your system varies according to the sizes of memory modules being used. Single, dual, and
quad rank DIMMs of capacities 8 GB, 16 GB, and 32 GB are supported for a total of up to 3 TB.
NOTE:
DIMMs in memory risers A and B are assigned to processor 1, C and D are assigned to processor 2, E and F are assigned
to processor 3 and G and H are assigned to processor 4.
Figure 17. Memory socket locations
Memory channels are organized as follows:
Table 32. Memory channel organization
Processor
channel 0:
1
slots A1, A5,
and A9
Processor
channel 0:
2
slots C1, C5,
and C9
66
Installing and removing system components
channel 1:
channel 2:
slots A2, A6,
slots A3, A7,
and A10
and A11
channel 1:
channel 2:
slots C2, C6,
slots C3, B7,
and C10
and C11
channel 3:
channel 0:
slots A4, A8,
slots B1, B5,
and A12
and B9
channel 3:
channel 0:
slots C4, C8,
slots D1, D5,
and C12
and D9
channel 1:
channel 2:
slots B2, B6,
slots B3, B7,
and B10
and B11
channel 1:
channel 2:
slots D2, D6,
slots D3, D7,
and D10
and D11
channel 3:
slots B4, B8,
and B12
channel 3:
slots D4, D8,
and D12
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