Users Guide

Introduction

Dell EMC now offers Intel's Data Center Persistent Memory Modules (DCPMMs), a nonvolatile memory that has the same form

factor as a standard DDR4 DIMM.

DCPMMs come in three capacities: 128 GB, 256 GB, and 512 GB.

DCPMMs are installed in the memory slots of the server and are compatible with RDIMMs and LRDIMMs.

DCPMM can be configured in two modes:

● Memory mode

● App-direct mode

In Memory mode: DCPMMs act as volatile system memory and any RDIMMs or LRDIMMs installed operate as cache for the

DCPMMs.

In App-direct mode: DCPMMs operate as byte addressable memory mapped persistent memory. DCPMMs and DRAM act as

independent memory resources. RDIMMs or LRDIMMs acts as volatile system memory. Applications can access persistent

memory by using memory load or store commands. Legacy applications that access storage as block devices can access

persistent memory (PMEM) through the PMEM block driver.

DCPMMs do not require an extra power supply or battery and are inherently persistent.

This document is intended to help customers understand the basics of Intel's DCPMM technology integrated in Dell PowerEdge

systems. It covers the fundamentals of installation and configuration of key settings for both the operating modes.

Topics:

• System requirements

• Terminology

System requirements

Table 1. System Requirements

Component Minimum version required

System R640, R740, R740xd, R840, R940, R940xa, MX740c and MX840c (2 and 4

socket systems)

Processor 2

Generation Intel Xeon Platinum or Gold processors

BIOS R640 - 2.3.10

R740/R740xd/R940 - 2.2.10

R840 / R940xa - 2.3.10

MX740c / MX840c - 2.3.10

CPLD R640 - 1.0.6

R740/R740xd - 1.0.8

R840 - 1.0.6

R940 - 1.0.4

R940xa - 1.0.6

MX740c / MX840c - 1.0.6

iDRAC 3.34.34.34

Introduction 5