The system
supports DDR4 registered DIMM (RDIMMs) slots and load reduced DIMM (LRDIMMs) slots. System memory holds
the instructions that are executed by the processor.
Your system contains 24 memory sockets split into
two 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. System memory location
Memory channels are organized as follows:
Table 1. Memory channelsThis tables describes memory channels and how the
channels are organized.
Processor
Channel 0
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Processor 1
Slots A1 and A7
Slots A2 and A8
Slots A3 and A9
Slots A4 and A10
Slots A5 and A11
Slots A6 and A12
Processor 2
Slots B1 and B7
Slots B2 and B8
Slots B3 and B9
Slots B4 and B10
Slots B5 and B11
Slots B6 and B12
Table 2. Memory populationThis table describes the memory population rules.
Processor
DIMM type
DIMM Ranking
Capacity
Voltage
Maximum Speed (1 DIMM per channel)
Maximum Speed (2 DIMM per channel)
SkyLake
RDIMM
1R/2R
8 GB, 16 GB, 32 GB
1.2 V
2666
2666
RDIMM
4R/8R
64 GB, 128 GB
1.2 V
2666
2666
CascadeLake
RDIMM
1R
8 GB
1.2 V
2666
2666
RDIMM
2R
16 GB, 32 Gb, 64 GB
1.2 V
2933
2666
LRDIMM
4R/8R
64 GB, 128 Gb
1.2 V
2666
2666
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