HPE ProLiant DL580 Gen9 - Memory, Processor, and Core Board Procedures

Hardware options installation 50
Item
Description
Definition
3
Data width
•
x4 = 4-bit
•
x8 = 8-bit
4
Memory generation
DDR4
5
Maximum memory
speed
2133 MT/s
6
CAS latency
P=15
7
DIMM type
•
R = RDIMM (registered)
•
L = LRDIMM (load reduced)
For the latest supported memory information, see the QuickSpecs on the Hewlett Packard Enterprise
website (http://www.hpe.com/info/qs).
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. A quad-rank
DIMM is, effectively, two dual-rank DIMMs on the same module. The server memory control subsystem
selects the proper rank within the DIMM when writing to or reading from the DIMM.
Quad- and dual-rank LRDIMMs 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, a quad-rank DIMM would be 32 GB, and an octal-rank LRDIMM would be 64 GB.
LRDIMMs are labeled as quad- and octal-rank DIMMs. There are four and eight ranks of DRAM on the
DIMM, but the LRDIMM buffer creates an abstraction that allows the DIMM to appear as a logical
dual-rank DIMM to the system. This is called Rank Multiplication. The LRDIMM buffer also isolates the
electrical loading of the DRAM from the system to allow for faster operation. These two changes allow the
system to support up to three LRDIMMs per memory channel, providing for greater memory capacity and
higher memory operating speed compared to quad-rank RDIMMs.
Memory-processor compatibility information
The server processor determines the type of DIMM that will be supported in the server.
For the latest memory configuration information, see the product QuickSpecs on the Hewlett Packard
Enterprise website (http://www.hpe.com/info/qs).
DIMM type
• Intel Xeon E7 v3 processors support:
o Single-rank and dual-rank PC4-2133P (DDR4-2133) RDIMMs
o Quad-rank and octal-rank PC4-2133P (DDR4-2133) LRDIMMs
• Intel Xeon E7 v4 processors support:
o Single-rank and dual-rank PC4-2133P (DDR4-2133) RDIMMs
o Quad-rank and octal-rank PC4-2133P (DDR4-2133) LRDIMMs
o Single-rank and dual-rank PC4-2400T (DDR4-2400) RDIMMs
o Quad-rank and octal-rank PC4-2400T (DDR4-2400) LRDIMMs
Install only DDR4-2133 or DDR-2400 DIMMs in the server. Mixing DIMM speeds is not supported.
Maximum memory capacity