Memory specifications
Table 22. 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
DCPMM
NA 128 GB
RDIMM: 64 GB RDIMM: 384 GB RDIMM: 128 GB LRDIMM: 1536 GB
DCPMM: 128 GB DCPMM: 768 GB DCPMM: 128 GB DCPMM: 1536 GB
NA 256 GB
NA NA RDIMM: 192 GB LRDIMM: 1536 GB
NA NA DCPMM: 2048 GB DCPMM: 3072 GB
NA 512 GB
NA NA RDIMM: 384 GB RDIMM: 1536 GB
NA NA DCPMM: 4096 GB DCPMM: 6144 GB
NOTE: 8 GB RDIMMs and NVDIMM-N must not be mixed.
NOTE: Minimum of two CPUs are required for any configurations that support NVDIMM-N.
NOTE: DCPMM can be mixed with RDIMMs and LRDIMMs.
NOTE: Mixing of DDR4 DIMM Types (RDIMM, LRDIMM), within channel, integrated memory controller, socket, or
across sockets is not supported.
NOTE: x4 and x8 DDR4 DIMMs can be mixed within channel.
NOTE: Mix of Intel DCPMM operating modes (App Direct, Memory Mode) is not supported within socket or across
sockets.
NOTE: DIMM slots are not hot-pluggable.
Storage controller specifications
The PowerEdge R640 system supports:
• Internal storage controller cards: PowerEdge RAID Controller (PERC) H330, H730p, H740p, Software RAID (SWRAID) S140.
• Boot Optimized Storage Subsystem: HWRAID 2 x M.2 SSDs 240 GB, 480 GB.
○ The card supports up to two 6 Gbps M.2 SATA drives. The BOSS adapter card has a x8 connector using PCIe gen 2.0 x2 lanes,
available only in the low-profile and half-height form factor.
• External PERC (RAID): H840
• 12Gbps SAS HBAs (non-RAID):
34
Technical specifications
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