Users Guide

CPU type and maximum memory limits
Table 8. CPU type and maximum memory limits
CPU type Maximum memory supported
(Includes voltaile and persistent memory capacity)
All CPU SKUs 1 TB per CPU socket
M SKUs 2 TB per CPU socket
L SKUs 4.5 TB per CPU socket
PMem mixing and population rules
This section has general rules for DIMM mixing and population.
Each system must contain only one capacity of PMem. If you mix PMem capacities, an F1/F2 warning message is displayed. This
is not a supported configuration and must not be populated. The table PMem configurations replace the following rules:
Mixing rules
● PMem can be mixed with RDIMM, LRDIMM, and 3DS LRDIMM.
● Mixing DDR4 DIMM types (RDIMM, LRDIMM, 3DS LRDIMM), within a channel, iMC, socket, or across sockets are not
supported.
● x4 and x8 DDR4 DIMMs can be mixed within a channel.
● Mixing PMem operating modes (App-direct, Memory mode) is not supported.
Population rules
● Maximum of one PMem per channel.
● If only one DIMM is populated on a channel, it should always go to the first slot in that channel (white slot).
● If a PMem and a DDR4 DIMM are populated on the same channel, always plug PMem on the second slot (black slot).
● If the PMem is configured in Memory Mode, the recommended DDR4 to PMem capacity ratio is 1:4 to 1:16 per iMC.
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Hardware