Table 19 Expansion card riser specifications (continued)
PCIe slot
Riser
Processor
connection
Height
Length
Slot width
3
On the
system board
Processor 1
Low profile
Half length
x16
4
On the
system board
Processor 2
Low profile
Half length
x16
6
X16 PCIe
Riser 2
Processor 2
Full height
Full length
x16
Memory specifications
VxFlex Ready Node R840 servers support up to 48 288-pins RDIMMs, LRDIMMs, and
NVDIMM-Ns supported with speeds of 2667 MT/s, 2400 MT/s, 2133 MT/s, and 1866
MT/s with support for memory optimized operation.
The following table shows the memory specifications for the R840 system:
Table 20 Memory specifications
DIMM
type
DIMM
rank
DIMM
capacity
Dual processors
Quad processors
Minimum
RAM
Maximum
RAM
Minimum
RAM
Maximum
RAM
LRDIMM
Octal rank
128 GB
256 GB
3072 GB
512 GB
6144 GB
LRDIMM
Quad rank
64 GB
128 GB
1536 GB
256 GB
3072 GB
RDIMM
Dual rank
32 GB
64 GB
768 GB
128 GB
1536 GB
RDIMM
Dual rank
16 GB
32 GB
384 GB
64 GB
768 GB
RDIMM
Single rank
8 GB
16 GB
192 GB
32 GB
384 GB
NVDIMM-N Single rank
16 GB
RDIMM:
192 GB
RDIMM:
384 GB
RDIMM:
384 GB
RDIMM:
1152 GB
NVDIMM-
N: 16 GB
NVDIMM-
N: 192 GB
NVDIMM-
N: 16 GB
NVDIMM-
N: 192 GB
Note
Do not mix 8 GB RDIMMs and 16 GB NVDIMM-Ns.
Note
Do not mix 64 GB LRDIMMs and 128 GB LRDIMMs.
The following table shows the DIMM blank population rules for the R840 system:
Technical specifications
Memory specifications
191