Dell EMC PowerEdge R640 - Memory Specifications

Figure 36. Installing an expansion card into the expansion riser 2A
Next steps
After installing a card into the riser 1, close the PCIe card holder latch. If applicable, close the PCIe guide after installing the expansion
card.
Follow the procedure listed in After working inside your system.
Install any device drivers required for the card as described in the documentation for the card.
Memory specifications
Table 27. Memory specifications
DIMM
type
DIMM rank
DIMM
capacity
Single processor Dual processors
Minimum RAM Maximum RAM Minimum RAM Maximum RAM
LRDIMM
Octa rank
512 GB 512 GB 6 TB 1024 GB 12 TB
256 GB 256 GB 3 TB 512 GB 6 TB
128 GB 128 GB 1.5 TB 256 GB 3 TB
Quad rank 64 GB 64 GB 768 GB 128 GB 1.5 TB
RDIMM
Single rank 8 GB 8 GB 96 GB 16 GB 192 GB
Dual rank
16 GB 16 GB 192 GB 32 GB 384 GB
32 GB 32 GB 384 GB 64 GB 768 GB
64 GB 64 GB 768 GB 128 GB 1536 GB
NVDIMM-
N
Single rank
16 GB
Not supported
with single
processor
Not supported
with single
processor
RDIMM: 192 GB RDIMM: 384 GB
NVDIMM-N: 16 GB NVDIMM-N: 192 GB
128 GB
Not supported
with single
processor
Not supported
with single
processor
NVDIMM-N: 256 GB NVDIMM-N: 3 TB
DCPMM
NA 128 GB
RDIMM: 192GB RDIMM: 384 GB RDIMM: 384 GB LRDIMM: 1536 GB
DCPMM: 128 GB DCPMM: 128 GB DCPMM: 1536 GB DCPMM: 1536 GB
NA 256 GB
NA NA RDIMM: 384 GB LRDIMM: 1536 GB
NA NA DCPMM: 2048 GB DCPMM: 3072 GB
Technical specifications 47