Memory Configuration; Configure Dc Persistent Memory Module (Dcpmm) - Lenovo ThinkSystem SR650 Series Setup Manual

http://sysmgt.lenovofiles.com/help/topic/com.lenovo.systems.management.xcc.doc/NN1ia_c_
manageserverfirmware.html

Memory configuration

Memory performance depends on several variables, such as memory mode, memory speed, memory ranks,
memory population and processor.
More information about optimizing memory performance and configuring memory is available at the Lenovo
Press website:
https://lenovopress.com/servers/options/memory
In addition, you can take advantage of a memory configurator, which is available at the following site:
http://1config.lenovo.com/#/memory_configuration
For specific information about the required installation order of memory modules in your server based on the
system configuration and memory mode that you are implementing, see "DIMM installation rules" on page
140.
Table 32. Channel and slot information of DIMMs around processor 1 and 2
The memory-channel configuration table is a three-column table that shows the relationship between the
processors, memory controllers, memory channels, slot number and the DIMM connectors.
Integrated Memory Controller
(iMC)
Channel
Slot
DIMM connector (processor 1)
DIMM connector (processor 2)

Configure DC Persistent Memory Module (DCPMM)

DCPMM capacity could act as accessible persistent memory for applications or volatile system memory.
Based on the approximate percentage of DCPMM capacity invested in volatile system memory, the following
three operating modes are available for choice:
• App Direct Mode (0% of DCPMM capacity acts as system memory):
In this mode, DCPMMs act as independent and persistent memory resources directly accessible by
specific applications, and DRAM DIMMs act as system memory.
The total volatile displayed system memory in this mode is the sum of DRAM DIMM capacity.
Notes:
– In App Direct Mode, the DRAM DIMMs that are installed can be configured to mirror mode.
– When only one DCPMM is installed for each processor, only not-interleaved App Direct Mode is
supported.
• Mixed Memory Mode (1-99% of DCPMM capacity acts as system memory):
202
ThinkSystem SR650 Setup Guide
Controller 0
Channel 2 Channel 1
0 1 0 1
1 2 3 4
13 14 15 16
Channel 0 Channel 0
0 1 1 0
5 6 7 8
17 18 19 20
Controller 1
Channel 1 Channel 2
1 0 1 0
9 10 11 12
21 22 23 24