Supermicro X11DPU - DIMM Population Requirements for the 81 Xx;61 Xx;51 Xx;41 Xx;31 Xx Series Processors

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Chapter 2: Installation
DIMM Population Requirements for the 81xx/61xx/51xx/41xx/31xx
Series Processors
For optimal memory performance, follow the tables below when populating memory modules.
Key Parameters for DIMM Congurations
Parameters Possible Values
Number of Channels 1, 2, 3, 4, 5, or 6
Number of DIMMs per Channel 1DPC (1 DIMM Per Channel) or 2DPC (2 DIMMs Per Channel)
DIMM Type RDIMM (w/ECC), LRDIMM, 3DS-LRDIMM
DIMM Construction • non-3DS RDIMM Raw Cards: A/B (2RX4), C (1RX4),
D (1RX8), E (2RX8)
• 3DS RDIMM Raw Cards: A/B (4RX4)
• non-3DS LRDIMM Raw Cards: D/E (4RX4)
• 3DS LRDIMM Raw Cards: A/B (8RX4)
General Population Requirements
DIMM Mixing Rules
• Please populate all memory modules with DDR4 DIMMs only.
• X4 and X8 DIMMs can be mixed in the same channel.
• Mixing of LRDIMMs and RDIMMs is not allowed in the same channel, across different channels, and across
different sockets.
• Mixing of non-3DS and 3DS LRDIMM is not allowed in the same channel, across different channels, and across
different sockets.
Mixing of DIMM Types within a Channel
DIMM Types RDIMM LRDIMM 3DS LRDIMM
RDIMM Allowed Not Allowed Not Allowed
LRDIMM Not Allowed Allowed Not Allowed
3DS LRDIMM Not Allowed NotAllowed Allowed