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Chapter 3: Maintenance and Component Installation
Populating RDIMM/RDIMM 3DS/LRDIMM/LRDIMM 3DS DDR4 Memory Modules
Type
DIMM Population
Maximum DIMM Capacity (GB)
Maximum
Frequency (MHz)
1 Channel
8 Channels
RDIMM
1R (1 Rank)
32GB
256GB
3200
2R or 2DR (2 Ranks)
64GB
512GB
3200
LRDIMM dual die
4DR (4 Ranks)
128GB
1TB
3200
3DS LRDIMM
2S2R (4 Ranks)
128GB
1TB
3200
2S4R (8 Ranks)
256GB
2TB
3200
3DS RDIMM
2S2R (4 Ranks)
128GB
1TB
3200
2S4R (8 Ranks)
256GB
2TB
3200
1R: 1 package rank of SDP DRAMs
2R: 2 package rank of SDP DRAMs
2DR: 2 package rank of DDP DRAMs
4DR: 4 package rank of DDP DRAMs
2S2R/2S4R/2S8R: 2 package rank of 2/4/8 high 3DS DRAMs
DIMM Population Guide (with AMD Ryzen™
Threadripper™)
Channel
CPU#
D1
C1
B1
A1
E1
F1
G1
H1
1 DIMM (supported but not recommended)
CPU1
X
2 DIMMs (supported but not recommended)
CPU1
X
X
4 DIMMs (conditionally recommended if 32 cores or fewer)
CPU1
X
X
X
X
6 DIMMs
Unbalanced (Not Recommended)
8 DIMMs
CPU1
X
X
X
X
X
X
X
X