Dimm Population Requirements - Supermicro X11DDW-L/NT User Manual

X11DDW-L/NT User's Manual

DIMM Population Requirements

For optimal memory performance, follow the tables below when populating memory modules.
Number of Channels
Number of DIMMs per Channel
DIMM Construction
•
All DIMMs must be 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.
DIMM Types
RDIMM
LRDIMM
3DS LRDIMM
Key Parameters for DIMM Configurations
Parameters
1DPC (1 DIMM Per Channel) or 2DPC (2 DIMMs Per Channel)
DIMM Type
General Population Requirements
DIMM Mixing Rules
Mixing of DIMM Types within a Channel
RDIMM
Allowed
Not Allowed
Not Allowed
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Possible Values
1, 2, 3, 4, 5, or 6
RDIMM (w/ECC), 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)
LRDIMM 3DS LRDIMM
Not Allowed Not Allowed
Allowed Not Allowed
NotAllowed Allowed