Figure 19. 24 x 2.5-inch + 2 x 2.5-inch (rear) drive system
The following table provides detailed information about the expansion card riser specifications:
Table 5. Expansion card riser specifications
PCIe slot
Riser
Processor
connection
Height
Length
Slot width
1
X8 PCIe Riser 1
Processor 1
Full height
Half length
x8
2
X16 PCIe Riser 1
Processor 1
Full height
Full length
x16
X8 PCIe Riser 1
Processor 1
Full height
Half length
x8
3
On the system board
Processor 1
Low profile
Half length
x16
4
On the system board
Processor 2
Low profile
Half length
x16
5
X8 PCIe Riser 2
Processor 2
Full height
Half length
x8
6
X16 PCIe Riser 2
Processor 2
Full height
Full length
x16
X8 PCIe Riser 2
Processor 2
Full height
Half length
x8
Memory specifications
The PowerEdge R840 system supports 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.
Table 6. 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
Technical specifications
21