Maximum memory capacity for AMD processors
DIMM type DIMM rank Capacity (GB) One processor
(GB)
Two processors
(GB)
RDIMM Single 8 128 256
RDIMM Single 16 256 512
RDIMM Dual 16 256 512
RDIMM Dual 32 512 1024
LRDIMM Quad 64 1024 2048
LRDIMM Octal 128 2048 4096
SmartMemory
HPE SmartMemory is included in each Gen10 ProLiant Server. Hewlett Packard Enterprise works closely
with leading memory device manufacturers in the development, qualification, and production testing of
DIMMs to ensure that they meet the tighter tolerances specified by Hewlett Packard Enterprise.
Memory subsystem architecture
The memory subsystem in this server is divided into channels. Each processor supports 8 channels, and
each channel supports 2 DIMM slots, as shown in the following table.
Channel Population order Slot number
A G O 10 9
B C K 12 11
C E M 14 13
D A I 16 15
E H P 7 8
F D L 5 6
G F N 3 4
H B J 1 2
For the location of the slot numbers, see "DIMM slot locations on page 22."
This multi-channel architecture provides enhanced performance in Advanced ECC mode.
DIMM slots in this server are identified by number and by letter. Letters identify the population order. Slot
numbers indicate the DIMM slot ID for spare replacement.
DIMM ranks
To understand and configure memory protection modes properly, an understanding of DIMM rank is
helpful. Some DIMM configuration requirements are based on these classifications.
A single-rank DIMM has one set of memory chips that is accessed while writing to or reading from the
memory. A dual-rank DIMM is similar to having two single-rank DIMMs on the same module, with only
one rank accessible at a time. A quad-rank DIMM is, effectively, two dual-rank DIMMs on the same
module. Only one rank is accessible at a time. The server memory control subsystem selects the proper
rank within the DIMM when writing to or reading from the DIMM.
66 SmartMemory
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