Supermicro X11DPH-I User Manual page 35

DIMM Population Guidelines for Optimal Performance
For optimal memory performance, follow the instructions listed in the tables below when
populating memory modules.
Key Parameters for DIMM Confi guration
Parameters
Number of Channels
Number of DIMMs per Channel
DIMM Type
DIMM Construction
DIMM Mixing Guidelines
•
All DIMMs must be all DDR4 DIMMs.
•
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.
DIMM Types
RDIMM
LRDIMM
3DS LRDIMM
Key Parameters for DIMM Confi gurations
1DPC (1 DIMM Per Channel) or 2DPC (2 DIMMs Per Channel)
RDIMM (w/ECC), 3DS RDIMM, LRDIMM, 3DS LRDIMM
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 DIMM Mixing Guidelines
DIMM Mixing Rules
Mixing of DIMM Types within a Channel
RDIMM
Allowed
Not Allowed
Not Allowed
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Chapter 2: Installation
Possible Values
1, 2, 3, 4, 5, or 6
LRDIMM 3DS LRDIMM
Not Allowed Not Allowed
Allowed Not Allowed
Not Allowed Allowed