The memory subsystem in this server is divided into channels. Each processor supports eight channels, and each channel
supports three DIMM slots, as shown in the table below. White DIMM slots denote the first slot of a channel (Ch 4A, Ch 9B,
Ch 1C, Ch 12D...).

Channel

Population order

Slot number

1

A
E

J

4
5
6

2

B
F
K

9
8
7

3

C

G

L

1
2
3

4

D
H

M

12
11
10

The server can operate in independent channel mode (performance) or combined channel mode (lockstep). Lockstep mode
improves the system reliability and availability. If running with RDIMM (built with x4 DRAM devices), the system can survive
the complete failure of two DRAM devices (DDDC). Running in independent mode, the server can only survive the complete
failure of a single DRAM device (SDDC).
 
Memory performance depends on selected processor and whether the system is configured for independent channel mode
(performance mode) or lockstep mode (RAS mode).
 

Max memory
speed

Processors

1866MHz

E7-8893 v3, E7-8891 v3, E7-8880L v3, E7-8867 v3, E7-8890 v3, E7-8880 v3, E7-8870 v3, E7-4860
v3

1600MHz

E7-4850 v2, E7-4830 v2, E7-4820 v2, E7-4809 v2

Performance or Independent Mode :

In this mode each DDR4 channel works independently and the SMI2 channel operates at twice the DDR4 speed (3200 MT/s
max).

 
Lockstep mode

:

In this mode, the memory controller operates two DDR4 channels behind one memory buffer as single channel and the SMI2
channel operates at the DDR4 transfer rate (1866 MT/s max).

The server supports the following DIMM speeds as shown below in the table Performance (Lockstep).

DIMM type

DIMM rank

Voltage

1 DIMM per

channel

2 DIMMs per

channel

3 DIMMs per

channel

RDIMM

Single-rank (8 GB)

LV

1600 (1866)

1600 (1866)

1600 (1600)

RDIMM

Dual-rank (16 GB)

LV

1600 (1866)

1600 (1866)

1600 (1600)

RDIMM

Dual-rank (32 GB)

LV

1600 (1866)

1600 (1866)

1600 (1600)

LRDIMM

Quad-rank (32GB)

LV

1600 (1866)

1600 (1866)

1600 (1600)

DIMM Classification and Identification

QuickSpecs

HP ProLiant DL580 Gen9 Server

Memory

DA - 15187   Worldwide QuickSpecs — Version 2 — 8.17.2015

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