Supermicro SuperServer 2049U-TR4 - DIMM Population Requirements for the 81 Xx;61 Xx;51 Xx Series Processors

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Chapter 3: Maintenance and Component Installation
DDR4 Memory Support (for 1-Slot Per-Channel Conguration)
Type
Ranks Per
DIMM and
Data Width
DIMM Capacity
(GB)
Speed (MT/s); Voltage (V); Slots per Channel
(SPC) and DIMMs per Channel (DPC)
1 Slot per Channel
1DPC (1-DIMM per Channel)
4 Gb 8 Gb 1.2 V
RDIMM SRx4 8 GB 16 GB 2666
RDIMM SRx8 4 GB 8 GB 2666
RDIMM DRx8 8 GB 16 GB 2666
RDIMM DRx4 16 GB 32 GB 2666
RDIMM 3Ds QRX4 N/A 2H-64GB 2666
RDIMM 3Ds 8RX4 N/A 4H-128GB 2666
LRDIMM QRx4 32 GB 64 GB 2666
LRDIMM
3Ds
QRX4 N/A 2H-64GB 2666
8Rx4 N/A
4H-128
GB
2666
DIMM Population Requirements for the 81xx/61xx/51xx 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