A+ Server AS -2124US-TNRP User's Manual
36
Populating RDIMM/RDIMM 3DS/LRDIMM/LRDIMM 3DS DDR4
Memory Modules
Type
DIMM Population
Maximum DIMM
Capacity (GB)
Maximum Frequency
(MHz)
DIMM1
DIMM2
1 Channel 8 Channel
RDIMM
1R
32GB
256GB
3200
1R
1R
64GB
512GB
2933
2R or 2DR
64GB
512GB
3200
1R
2R or 2DR
96GB
768GB
2933
2R or 2DR
2R or 2DR
128GB
1TB
2933
LRDIMM
dual die package
4DR
128GB
1TB
3200
4DR
4DR
256GB
2TB
2933
LRDIMM 3DS
2S2R
128GB
1TB
3200
2S4R
256GB
2TB
3200
2S2R
2S2R
256GB
2TB
2933
2S2R
2S4R
384GB
3TB
2933
2R4H
2R4H
256GB
2TB
1866
3DS RDIMM
2S2R
128GB
1TB
2933
2S2R
2S2R
256GB
2TB
2666
2S4R
256GB
2TB
2933
2S2R
2S4R
384GB
3TB
2666
2S4R
2S4R
512GB
4TB
2666
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.
•
In single-CPU configurations, memory must be installed in the DIMM slots associated with
the installed CPU.
•
For MM, NM/FM ratio is between 1:4 and 1:16. The capacity not used for FM can be used
for AD. (NM = Near Memory; FM = Far Memory).
•
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.