Removal and replacement procedures 46
Processor type
DIMM rank
1 DIMM per channel
2 DIMMs per channel
Intel Xeon E5-2600 v3
Single (8 GB)
2133
2133
Intel Xeon E5-2600 v4
Single (8 GB)
2400
2400
Intel Xeon E5-2600 v3
Dual (16 GB)
2133
2133
Intel Xeon E5-2600 v4
Dual (16 GB)
2400
2400
Intel Xeon E5-2600 v4
Dual (32 GB)
2400
2400
SmartMemory
SmartMemory authenticates and unlocks certain features available only on Qualified memory and verifies
whether installed memory has passed Hewlett Packard Enterprise qualification and test processes.
Qualified memory is performance-tuned for ProLiant and BladeSystem servers and provides future
enhanced support through Active Health and manageability software.
Memory subsystem architecture
The memory subsystem in this server is divided into channels. Each processor supports four channels,
and each channel supports two DIMM slots, as shown in the following table.
Channel
Processor 1 slot Processor 1 slot
number
Processor 2 slot Processor 2 slot
number
1
A
E
8
7
A
E
8
7
2
B
F
6
5
B
F
6
5
3
C
G
1
2
C
G
1
2
4
D
H
3
4
D
H
3
4
For the location of the slot numbers, see "DIMM slot locations (on page
)."
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.
Single-, dual-, and quad-rank DIMMs
To understand and configure memory protection modes properly, an understanding of single-, dual-, and
quad-rank DIMMs 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.
Dual- and quad-rank DIMMs provide the greatest capacity with the existing memory technology. For
example, if current DRAM technology supports 8-GB single-rank DIMMs, a dual-rank DIMM would be 16
GB, and a quad-rank DIMM would be 32 GB.
LRDIMMs are labeled as quad-rank DIMMs. There are four ranks of DRAM on the DIMM, but the
LRDIMM buffer creates an abstraction that allows the DIMM to appear as a dual-rank DIMM to the
system. The LRDIMM buffer isolates the electrical loading of the DRAM from the system to allow for faster
operation. This allows higher memory operating speed compared to quad-rank RDIMMs.
