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Chapter 3: Maintenance and Component Installation
DDR4 Memory Support for One Slot per Channel
Type
Ranks
Per
DIMM
and
Data
Width
DIMM Capacity
(GB)
Speed (MT/s)
One Slot per Channel
One DIMM per Channel
4 Gb 8 Gb 1.2 Volts
RDIMM
SRx4 8 GB 16 GB 2666
SRx8 4 GB 8 GB 2666
DRx8 8 GB 16 GB 2666
DRx4 16 GB 32 GB 2666
RDIMM 3Ds
QRX4 N/A 2H-64GB 2666
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
Check the Supermicro website for possible updates to memory support.
Memory Population Guidelines
• All DIMMs must be DDR4.
• Balance memory. Using unbalanced memory topology, such as populating two DIMMs in
one channel while populating one DIMM in another channel, reduces performance. It is
not recommended for Supermicro systems.
•
installed CPUs.
Guidelines Regarding Mixing DIMMs
• Populating slots with a pair of DIMM modules of the same type and size results in inter-
leaved memory, which improves memory performance.
• Use memory modules of the same type and speed, as mixing is not allowed.
• x4 and x8 DIMMs can be mixed in the same channel.
•
•
DIMM Construction
• RDIMM (non-3DS) Raw Cards: A/B (2Rx4), C (1Rx4), D (1Rx8), E (2Rx8)
• 3DS RDIMM Raw Cards: A/B (4Rx4)
• LRDIMM (non-3DS) Raw Cards: D/E (4Rx4)
• 3DS LRDIMM Raw Cards: A/B (8Rx4)
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