Memory Population Guidelines

To maximize performance, install two memory cartridges per processor and balance the total memory capacity
between all installed processors.
HP recommends installing  DIMMs in pairs using identical part number DIMMs.
LRDIMMs support higher densities than single- and dual-rank RDIMMs.  This support enables high capacity DIMMs,
resulting in higher system memory capacities and higher bandwidth.
Do not mix LRDIMMs with any other DIMM type (RDIMM, LVDIMM).
Only Quad Rank LRDIMMs are supported, Dual Rank LRDIMMs are not supported.
RDIMM population is limited to a maximum of eight logical ranks per channel. Therefore, only two quad rank RDIMMs
are supported per channel.  LRDIMMs rank multiplication enables support for three Quad Rank LRDIMMs per
channel.
Performance and Lockstep modes require specific population requirements.  Follow the memory configuration rule
table below for desired mode configuration.

DIMM pair installation
order

Performance and mirror mode

RAS (Lockstep) mode

1

4A, 9B

4A, 1C

2

1C, 12D

9B, 12D

3

5E, 8F

5E, 2G

4

2G, 11H

8F, 11H

5

6J, 7K

6J, 3L

6

3L, 10M

K, 10M

NOTE: 

UDIMMs are not supported. This server does not support mixing LRDIMMs, RDIMMs, or UDIMMs. Attempting to mix

any combination of these DIMMs can cause the server to halt during BIOS initialization.
For detailed memory configuration rules and guidelines, use the Online DDR4 Memory Configuration Tool on the HP website
(

http://www.hp.com/go/ddr4config

).

Online Sparing Configuration Guidelines

Online spare memory provides protection against degraded DIMMs by reducing the likelihood of uncorrected memory errors.
This protection is available without any operating system support.

Online spare memory protection dedicates one rank of each memory channel for use as spare memory. The remaining
ranks are available for OS and application use. If correctable memory errors occur at a rate higher than a specific threshold
on any of the non-spare ranks, the server automatically copies the memory contents of the degraded rank to the online
spare rank. The server then deactivates the failing rank and automatically switches over to the online spare rank.

For Online Spare memory mode configurations, observe the following guidelines:

Observe the DIMM slot population guidelines.
Each channel must have a valid online spare configuration.
Each channel can have a different valid online spare configuration.
Each populated channel must have a spare rank.
A single dual-rank DIMM is not a valid configuration.

QuickSpecs

HP ProLiant DL580 Gen9 Server

Memory

DA - 15187   Worldwide QuickSpecs — Version 2 — 8.17.2015

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