Table 11. Expansion card riser slots
Expansion card risers PCIe slot
Processor
connection
Height Length Slot width
Riser 1A
Slot 1 Processor 1 Full Height Half Length x16
Slot 2 Processor 1 Full Height Half Length x16
Riser 4A
Slot 3 Processor 2 Full Height Half Length x16
Slot 4 Processor 2 Full Height Half Length x16
Memory specifications
The PowerEdge XE8640 system supports the following memory specifications for optimized operation.
NOTE: Up to 16 DIMM per processor and up to 32 DIMMs in a dual- processor configuration. XE8640 supports RDIMM
only.
NOTE: For best performance, populate all memory channels equally, 16 DIMMs per CPU using identical DIMMs.
Table 12. Memory specifications
DIMM type DIMM rank
DIMM
capacity
Single processor Dual processors
Minimum
system
capacity
Maximum system
capacity
Minimum
system
capacity
Maximum system
capacity
RDIMM
Dual rank 32 GB 32 GB 512 GB 64 GB 1 TB
Dual rank 64 GB 64 GB 1 TB 128 GB 2 TB
Quad rank 128 GB 128 GB 2 TB 256 GB 4 TB
Table 13. Memory module sockets
Memory module sockets Speed
32, 288-pin 4800 MT/s, 4400 MT/s, 3200 MT/s
NOTE: Memory DIMM slots are not hot pluggable.
Storage controller specifications
. The PowerEdge XE8640 system supports the following controller cards:
Table 14. Storage controller cards
Supported storage controller card
Internal Boot
● Boot Optimized Storage Subsystem (NVMe BOSS-N1): HWRAID 1, 2 x M.2 SSDs
Software RAID
● S160
Drives
The PowerEdge XE8640 system supports:
● 8 x 2.5 inch hot-swappable NVMe SSD drives.
24
Technical specifications
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