Lenovo HR650X V2 User Manual page 99

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Table 15. Mirroring mode with two processors (continued)

32 DIMMs

PMEM and DRAM DIMM installation order

This section contains information of how to install PMEMs and DRAM DIMMs properly.

PMEM rules

Make sure to meet the following requirements when applying PMEMs in the system.

• All the PMEMs that are installed must be of the same part number.

• All the DRAM DIMMs 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 DIMMs with the same part number.

For PMEM, the following memory modes are available:

• "App Direct Mode" on page 91

• "Memory Mode" on page 92

App Direct Mode

In this mode, PMEMs act as independent and persistent memory resources directly accessible by specific

applications, and DRAM DIMMs act as system memory. It is suggested that the ratio of DRAM DIMM

capacity to PMEM capacity is between 1:1 and 1:8.

With one processor

Table 16. Memory population in App Direct Mode with one processor

• D: DRAM DIMMs with 16 GB or larger capacity

• P: DC Persistent Memory Module (PMEM)

Configuration

1 PMEM and 6

DIMMs

1 PMEM and 8

DIMMs

2 PMEMs and 12

DIMMs

4 PMEMs and 4

DIMMs

4 PMEMs and 8

DIMMs

8 PMEMs and 8

DIMMs

Processor 0

Chapter 4

Hardware replacement procedures

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