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Chapter 6. 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
Table 25. 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)
DC Persistent Memory Module (DCPMM) setup
Follow the instructions in this section to complete required setup before installing DCPMMs for the first time,
determine the most suitable configuration, and install memory modules accordingly.
Complete the following steps to finish system setup to support DCPMM, and install the memory modules
according to the designated combination.
1. Update the system firmware to the latest version that supports DCPMM (see "Update the firmware" in
Setup Guide).
2. Make sure to meet all the following requirements before installing DCPMMs.
• All the DCPMMs that are installed must be of the same Lenovo part number.
• All DRAM memory modules that are installed must be of the same type, rank, and capacity with
minimum capacity of 16 GB. It is recommended to use Lenovo DRAM memory modules of the same
part number.
3. Refer to DCPMM installation rules to determine the most suitable combination and the following:
• Number and capacity of the DCPMMs and DRAM memory modules to install
• Check if the presently installed processors support the combination. If not, replace the processors
with ones that support the combination.
4. Based on the determined DCPMM combination, acquire the DCPMMs, DRAM memory modules and
processors if necessary.
5. Remove all the memory modules that are installed.
© Copyright Lenovo 2020
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
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