Intel Optane DC Persistent MemoryProduct Guide

Author
Updated
26 Apr 2019
Form Number
LP1066
PDF size
16 pages, 1.0 MB

Abstract

Intel Optane DC Persistent Memory is an innovative technology that delivers a unique combination of affordable large memory capacity and persistence (non-volatility). The persistent memory technology can help boost the performance of data-intensive applications, such as in-memory analytics, databases, content delivery networks, and high performance computing (HPC), as well as deliver consistent service levels at scale with higher virtual machine and container density.

This product guide describes the Data Center Persistent Memory Modules (DCPMMs) and provides essential pre-sales information to understand the memory modules, their key features and specifications, and compatibility. This guide is intended for technical specialists, sales specialists, sales engineers, and IT architects who want to learn more about the DCPMMs and consider their use in IT solutions.

Change History

Changes in the April 26 update:

  • Clarified that memory mirroring is supported in App Direct mode however only the DRAM DIMMs are mirrored, not the DCPMMs - Implementation requirements section

Walkthrough video with David Watts and Ryan Hogg

Introduction

Intel Optane DC Persistent Memory represents a new class of memory and storage technology explicitly architected for data center usage. It offers three main benefits:

  • Significantly lower latency than fetching data from system storage
  • High capacities
  • Affordable cost

Using Lenovo ThinkSystem servers running applications that are tuned for Intel Optane DC Persistent Memory will result in lower data latency compared to solid-state drive technology. When data is stored closer to the processor on nonvolatile media, applications can see significant overall improvement in performance. 

An Intel Optane DC Persistent Memory Module (DCPMM) is shown in the following figure.

Intel Optane DC Persistent Memory Module
Figure 1. Intel Optane DC Persistent Memory Module (DCPMM)

Did you know?

Intel Optane DC Persistent Memory modules (DCPMMs) have the form factor of a DDR4 DIMM, but the persistence and capacity of data storage of a solid-state drive. This means the DCPMMs have performance characteristics similar to that of TruDDR4 DIMMs, the storage capacity of an SSD, and the ability to stay active after a power cycle or reboot of the server. These features open up a new way of performing data I/O to application developers and new levels of server performance to customers.

Part numbers

The following table lists the ordering information for the persistent memory options.

Table 1. Ordering information
Part number Feature code Description
For ThinkSystem servers except ThinkSystem SD650
4ZC7A15110 B4LV ThinkSystem 128GB TruDDR4 2666MHz (1.2V) Intel Optane DC Persistent Memory
4ZC7A15111 B4LW ThinkSystem 256GB TruDDR4 2666MHz (1.2V) Intel Optane DC Persistent Memory
4ZC7A15112 B4LX ThinkSystem 512GB TruDDR4 2666MHz (1.2V) Intel Optane DC Persistent Memory
For ThinkSystem SD650
CTO only* B691 ThinkSystem 128GB TruDDR4 2666MHz (1.2V) Intel Optane DC Persistent Memory for SD650
CTO only* B692 ThinkSystem 256GB TruDDR4 2666MHz (1.2V) Intel Optane DC Persistent Memory for SD650
CTO only* B693 ThinkSystem 512GB TruDDR4 2666MHz (1.2V) Intel Optane DC Persistent Memory for SD650

* Configure-to-order only, not available as a field upgrade. Planned for late 2Q/2019

DCPMM modes

Intel Optane DC Persistent Memory operates in one of three modes:

  • Memory Mode

    In this mode, the DCPMMs act as large capacity DDR4 memory modules. In such a configuration, the memory that the operating system recognizes is the DCPMMs; the installed TruDDR4 DIMMs are hidden from the operating system and act as a caching layer for the DCPMMs. In this mode, the persistence feature of the DCPMMs is disabled. This mode does not require the application to be DCPMM-aware.

  • App Direct Mode

    In this mode, the DCPMMs provide all persistence features to the operating system and applications that support them. The operating system presents both TruDDR4 DIMMs and DCPMMs to the applications, as system memory and persistent storage respectively.

    Depending on the configuration in UEFI and the operating system, the DCPMMs appear as one of two types of namespaces:

    • Direct access (DAX): byte-addressable storage accessible via an API. The applications must be DCPMM-aware and use the published APIs to implement the DCPMM features.
    • Block storage: the persistent memory is presented to applications is seen as a block storage device, similar to an SSD. The operating system needs to be DCPMM-aware, however the applications do not.

    Applications with planned support include:

    • SAP HANA
    • Aerospike Enterprise Edition
    • Gigaspaces
    • Apache Cassandra
    • Apache Spark SQL with OAP
    • Apache HBase Bucket Cache
    • Apache Hadoop HDFS Cache
  • Mixed Memory Mode

    Mixed Memory Mode is a combination of Memory Mode and App Direct Mode, where a portion of the capacity of the DCPMMs is used for the Memory Mode operations, and the remaining capacity of the DCPMMs is used for the App Direct Mode operations. In this mode, all installed TruDDR4 DIMMs are hidden from the operating system and act as a caching layer for portion of the DCPMMs in Memory Mode.

In App Direct mode (and the persistent portion of Mixed mode), the persistent memory can be configured in one of two ways:

  • Interleaved, where all DCPMMs are seen as one single monolithic space. This is similar in concept to RAID-0 in storage.
  • Non-interleaved, where each DCPMM is seen as a separate space. This is similar in concept to JBOD in storage.

For configure-to-order (CTO) configurations, the feature codes listed in the following table specify the DCPMM mode you wish to enable.

Table 2. DCPMM operating modes
Feature code Description
B528 DCPMM Memory mode
B529 DCPMM App Direct mode
B52A DCPMM Mixed Memory mode
B52B DCPMM Interleaved mode
B52C DCPMM Non-interleaved mode

The following figure shows a Lenovo TruDDR4 DIMM and an Intel Optane DC Persistent Memory Module.

Intel Optane DC Persistent Memory Module (top) and Lenovo TruDDR4 DIMM (bottom)
Figure 2. Intel Optane DC Persistent Memory Module (top) and Lenovo TruDDR4 DIMM (bottom)

Benefits

Intel Optane DC Persistent Memory provides benefits in the following application types:

  • Larger memory footprint: For applications with performance characteristics that place greater emphasis on memory capacity over memory bandwidth or memory latency, the use of DCPMMs can mean a significant increase in memory performance compared to the use of TruDDR4 DIMMs. 
    • Cloud and Infrastructure-as-a-service (IaaS) applications
    • More virtual machines and cloud containers per server
    • Larger memory allocation to each VM
  • In-memory databases: With DCPMMs, database applications have store much larger databases in persistent memory rather than on disk, and database performance will be improved significantly. For existing applications that use system RAM for in-memory databases, the use of persistent memory will mean no delays at boot time having to copy the databases from disk into memory.
  • Storage caching layers: TruDDR4 DIMMs can be used for the fastest memory access - best throughput and lowest latency, and DCPMMs can be used for the caching layer that offers memory-like performance with the persistence of SSD storage.
  • NFV infrastructure: Network Function Virtualization (NFV) can make use of increased memory capacity and performance with the addition of DCPMMs.
    • High capacity non-volatile cache for enterprise and cloud storage
    • High capacity local cache for network storage App Direct direct-attach storage

Specifications

Intel Optane DCPMMs have the following specifications:

  • DCPMMs are installed in standard memory slots in supported servers
  • 2666 MHz memory bus speed. Any 2933 MHz TruDDR4 DIMMs installed will also operate at 2666 MHz.
  • Optional data encryption using AES 256-bit encryption
  • Optional data security in App Direct mode, including secure erase functionality
  • Firmware updates through XClarity Administrator and other Lenovo support tools

DCPMMs offer the following memory protection technologies:

  • ECC
  • SDDC
  • DDDC
  • Patrol scrubbing
  • Demand scrubbing

Implementation requirements

The following are the requirements when selecting the number of DIMMs and DCPMMs:

  • DCPMMs require second generation Intel Xeon Scalable Family processors. First generation Xeon Scalable processors are not supported.
  • All Platinum processors, all Gold processors and the Silver 4215 processor support DCPMM.
  • All installed DCPMMs must be the same size. Mixing DCPMMs of different capacities is not supported
  • All installed DIMMs must be the same size and structure (ie same part number). Mixing different DIMMs is not supported
  • The use of 1Rx8 DIMMs with DCPMMs is not supported. See the Memory DIMM support section for specifics.
  • Maximum 6 DCPMMs per processor (install 1 in each memory channel)
  • Minimum 2 TruDDR4 DIMMs per processor (1 per memory controller)
  • For Memory Mode, minimum 2 DCPMMs per processor (install 1 per memory controller)
  • For App Direct Mode, minimum 1 DCPMM installed in the server (any processor)
  • When either Memory Mode or Mixed Mode is used, the ratio of memory to DCPMMs must be between 1:16 and 1:4, and the recommended ratio is 1:4 for the best performance. For example, 6x 16GB DIMMs + 2x 256GB DCPMMs is a ratio of 1:5.33. In Mixed Mode, the ratio is between memory and only the volatile portion of the DCPMMs. This ratio requirement does not apply to App Direct mode.
  • For each memory channel with both a DCPMM and a TruDDR4 DIMM installed, the DCPMM is installed in channel slot 1 (closest) and the DIMM is installed in channel slot 0
  • To maximize performance, balance all memory channels
  • In configurations with DCPMMs installed, memory mirroring is supported, with two restrictions:
    • Mirroring is only enabled on the DRAM DIMMs installed in the server; The DCPMMs themselves do not support mirroring.
    • Only App Direct mode is supported. Memory mirroring cannot be enabled when DCPMMs are in Memory Mode or Mixed Mode.
  • Memory sparing is not supported with DCPMMs installed

The following figure shows DCPMMs and TruDDR4 DIMMs installed in the system board of a ThinkSystem SR950. In this full configuration, there is one DCPMM and one TruDDR4 DIMM installed in each memory channel (6 DCPMMs and 6 DIMMs per processor).

Intel Optane DCPMMs installed in a ThinkSystem SR950 system board
Figure 3. Intel Optane DCPMMs installed in a ThinkSystem SR950 system board

App Direct Mode requirements

DCPMMs are only supported in quantities of 1, 2, 4 and 6 per processor, and only certain quantities of memory DIMMs are supported alongside the DCPMMs.

The following table lists the supported combinations in App Direct mode.

Table 3. Supported DCPMM and memory DIMM combinations - servers with 12 DIMMs per processor
DCPMM quantity
1 CPU / 2 CPUs
Supported DCPMM sizes Memory DIMM quantity
1 CPU / 2 CPUs
Supported memory
DIMM sizes
App Direct Mode
- / 1 Any DCPMM - / 12 Any supported DIMM*
1 / 2 Any DCPMM 6 / 12 Any supported DIMM*
2 / 4 Any DCPMM 4 / 8 Any supported DIMM*
2 / 4 Any DCPMM 6 / 12 Any supported DIMM*
2 / 4 Any DCPMM 8 / 16 Any supported DIMM*
4 / 8 Any DCPMM 6 / 12 Any supported DIMM*
6 / 12 Any DCPMM 6 / 12 Any supported DIMM*

* See the table in the Memory DIMM support section

For a discussion about the performance of App Direct mode, see the Lenovo Press paper, Analyzing the Performance of Intel Optane DC Persistent Memory in App Direct Mode in Lenovo ThinkSystem Servers, https://lenovopress.com/LP1083

Memory Mode requirements

In Memory Mode, the DCPMMs are seen by the operating system as system memory. The memory DIMMs are hidden from the operating system and are used as a high-speed cache for the DCPMMs.

Key to performance is the ratio of total DIMMs to total DCPMMs. The recommended range of DIMMs:DCPMMs is between 1:4 and 1:16:

  • 1:16 means 1GB of DIMMs (used for cache) for every 16GB of DCPMM capacity (used as system memory). A larger number than 16 means potentially worse performance since the chances of a cache hit in memory will be lower.
  • 1:4 means 1GB of DIMMs for every 4GB of DCPMM capacity. 1:4 is recommended as the best trade-off between performance and cost. A number smaller than 4 means system memory may be underutilized as cache and not worth the expense of the DIMMs.

DCPMMs are only supported in quantities of 1, 2, 4 and 6 per processor, and only certain quantities of memory DIMMs are supported alongside the DCPMMs.

The specific memory part numbers that are supported with DCPMMs is listed in the Memory DIMM support section.

Table 4. Supported DCPMM and memory DIMM combinations - servers with 12 DIMMs per processor
DCPMM quantity
1 CPU / 2 CPUs
Supported DCPMM sizes Memory DIMM quantity
1 CPU / 2 CPUs
Supported DIMM sizes
(Ratio of DIMMs:DCPMMs)
Memory Mode (DIMMs act as cache for the persistent memory)
2 / 4 256 GB 4 / 8 32 GB (1:4)
2 / 4 512 GB 4 / 8 32 GB (1:8), 64 GB (1:4)
2 / 4 256 GB 6 / 12 16 GB (1:5.3)
2 / 4 512 GB 6 / 12 16 GB (1:10.7), 32 GB (1:5.3)
4 / 8 256 GB 6 / 12 32 GB (1:5.3)
4 / 8 512 GB 6 / 12 32 GB (1:10.7), 64 GB (1:5.3)
6 / 12 128 GB 6 / 12 32 GB (1:4)
6 / 12 256 GB 6 / 12 32 GB (1:8), 64 GB (1:4)
6 / 12 512 GB 6 / 12 32 GB (1:16), 64 GB (1:8), 128 GB (1:4)

The table below shows sample combinations and the effective ratio. You can use this table as guidance to determine DIMM and DCPMM sizes based on desired total system memory capacity (which is the total DCPMMs when in memory mode) and the desired ratio.

When all 12 DIMMs are installed, this is referred to as a "2-2-2" configuration, where each 2 corresponds to the number of DIMMs per channel in one memory controller. When fewer DIMMs are installed, it is referred to a "2-2-1" or "2-1-1" or similar.

Balanced memory configurations: For more information about the recommended placement of memory in ThinkSystem servers, see the paper, Balanced Memory Configurations with Second-Generation Intel Xeon Scalable Processors.

Table 5. Memory mode capacities and ratios
DIMM placement Number of DCPMMs Number of DIMMs Capacity (Memory Mode) Ratio
2-2-2 12x 512GB 12x 128GB 6TB 1:4
12x 256GB 12x 64GB 3TB
12x 128GB 12x 32GB 1.5TB
2-2-1 8x 512GB 12x 64GB 2TB 1:5.3
8x 256GB 12x 32GB 1TB
8x 128GB 12x 16GB 512GB
2-2-2 12x 512GB 12x 64GB 6TB 1:8
12x 256GB 12x 32GB 3TB
12x 128GB 12x 16GB 1.5TB
2-2-1 8x 512GB 12x 32GB 2TB 1:10.7
8x 256GB 12x 16GB 1TB
2-2-2 12x 512GB 12x 32GB 6TB 1:16
12x 256GB 12x 16GB 3TB

Mixed Mode requirements

Mixed Memory Mode is a combination of Memory Mode and App Direct Mode, where a portion of the capacity of the DCPMMs is used for the Memory Mode operations, and the remaining capacity of the DCPMMs is used for the App Direct Mode operations.

In Mixed Mode, all installed TruDDR4 DIMMs are hidden from the operating system and act as a caching layer for portion of the DCPMMs in Memory Mode. Like Memory Mode, the ratio of total of the memory DIMMs to the total of the volatile (memory) portion of DCPMMs should be between 1:4 and 1:16.

When you enable Mixed Memory Mode in UEFI or you specify Mixed Memory Mode when building a CTO (configure-to-order) configuration (feature B52A), you will also be asked to specify the percentage of the DCPMM total capacity will be allocated to Memory Mode. The remaining DCPMM capacity will be allocated to App Direct Mode.

The following tables shows the allowed percentage for each DCPMM part number and what the effective amount of App Direct persistent memory will be available to applications. Only a set number of percentages are available to choose from and the amount of App Direct persistent memory that is allocated will be in increments of 32 GB multiplied by the number of DCPMMs installed.

Table 6. Available ratios available for Mixed Mode - 128 GB DCPMM
Volatile memory percentage requested (selected in UEFI or quantity of feature code B52D selected in CTO): Resulting Persistent percentage calculated (quantity of feature code B52E in CTO) DCPMM capacity reserved for App Direct Mode DCPMM capacity reserved for Memory Mode
24% 76% 96 GB 32 GB
49% 51% 64 GB 64 GB
75% 25% 32 GB 96 GB
Table 7. Available ratios available for Mixed Mode - 256 GB DCPMM
Volatile memory percentage requested (selected in UEFI or quantity of feature code B52D selected in CTO): Resulting Persistent percentage calculated (quantity of feature code B52E in CTO) DCPMM capacity reserved for App Direct Mode DCPMM capacity reserved for Memory Mode
11% 89% 224 GB 32 GB
24% 76% 192 GB 64 GB
37% 63% 160 GB 96 GB
49% 51% 128 GB 128 GB
62% 38% 96 GB 160 GB
75% 25% 64 GB 192 GB
87% 13% 32 GB 224 GB
Table 8. Available ratios available for Mixed Mode - 512 GB DCPMM
Volatile memory percentage requested (selected in UEFI or quantity of feature code B52D selected in CTO): Resulting Persistent percentage calculated (quantity of feature code B52E in CTO) DCPMM capacity reserved for App Direct Mode DCPMM capacity reserved for Memory Mode
4% 96% 480 GB 32 GB
11% 89% 448 GB 64 GB
17% 83% 416 GB 96 GB
24% 76% 384 GB 128 GB
30% 70% 352 GB 160 GB
36% 64% 320 GB 192 GB
43% 57% 288 GB 224 GB
49% 51% 256 GB 256 GB
55% 45% 224 GB 288 GB
62% 38% 192 GB 320 GB
68% 32% 160 GB 352 GB
75% 25% 128 GB 384 GB
81% 19% 96 GB 416 GB
87% 13% 64 GB 448 GB
94% 6% 32 GB 480 GB

The following table shows some of the supported combinations of DCPMMs and DIMMs. Additional combinations may be supported but the key requirement is ensuring that the ratio of the total memory DIMMs capacity to the total of the volatile (memory) portion of DCPMMs should be between 1:4 and 1:16.

Table 9. Supported DCPMM and memory DIMM combinations - servers with 12 DIMMs per processor
DCPMM quantity
1 CPU / 2 CPUs
Supported DCPMM sizes Memory DIMM quantity
1 CPU / 2 CPUs
Supported memory
DIMM sizes
Mixed Memory Mode
2 / 4 256 GB 6 / 12 16 GB
2 / 4 512 GB 6 / 12 16 GB, 32 GB
2 / 4 256 GB 4 / 8 16 GB
2 / 4 512 GB 4 / 8 16 GB, 32 GB
4 / 8 128 GB 6 / 12 16 GB
4 / 8 256 GB 6 / 12 16 GB, 32 GB
4 / 8 512 GB 6 / 12 16 GB, 32 GB, 64 GB
6 / 12 128 GB 6 / 12 16 GB
6 / 12 256 GB 6 / 12 16 GB, 32 GB
6 / 12 512 GB 6 / 12 16 GB, 32 GB, 64 GB

Memory DIMM support

The following table lists which TruDDR4 DIMMs can be installed with DCPMMs. 2933 MHz DIMMs will operate at 2666 MHz with installed with DCPMMs.

Notes:

Table 10. Memory ordering information
Part number Feature code Description Supports DCPMMs
2933 MHz RDIMMs (operate at 2666 MHz when installed with DCPMMs)
4ZC7A08706 B4H1 ThinkSystem 8GB TruDDR4 2933MHz (1Rx8 1.2V) RDIMM No
4ZC7A08707 B4LY ThinkSystem 16GB TruDDR4 2933MHz (1Rx4 1.2V) RDIMM Yes
4ZC7A08708 B4H2 ThinkSystem 16GB TruDDR4 2933MHz (2Rx8 1.2V) RDIMM Yes
4ZC7A08709 B4H3 ThinkSystem 32GB TruDDR4 2933MHz (2Rx4 1.2V) RDIMM Yes
4ZC7A08710 B4H4 ThinkSystem 64GB TruDDR4 2933MHz (2Rx4 1.2V) RDIMM Yes
2933 MHz 3DS RDIMMs (operate at 2666 MHz when installed with DCPMMs)
4ZC7A15113 B587 ThinkSystem 128GB TruDDR4 2933MHz (4Rx4 1.2V) 3DS RDIMM Yes
4ZC7A08727 B4Y3 ThinkSystem 256GB TruDDR4 2933MHz (8Rx4 1.2V) 3DS RDIMM Yes
2666 MHz RDIMMs
7X77A01301 AUU1 ThinkSystem 8GB TruDDR4 2666 MHz (1Rx8 1.2V) RDIMM No
CTO only B21T ThinkSystem 8GB TruDDR4 2666 MHz (2Rx8 1.2V) RDIMM Yes
7X77A01302 AUNB ThinkSystem 16GB TruDDR4 2666 MHz (1Rx4 1.2V) RDIMM Yes
7X77A01303 AUNC ThinkSystem 16GB TruDDR4 2666 MHz (2Rx8 1.2V) RDIMM Yes
7X77A01304 AUND ThinkSystem 32GB TruDDR4 2666 MHz (2Rx4 1.2V) RDIMM Yes
2666 MHz LRDIMMs
7X77A01305 AUNE ThinkSystem 64GB TruDDR4 2666 MHz (4Rx4 1.2V) LRDIMM Yes
2666 MHz 3DS RDIMMs
4ZC7A08716 AUW5 ThinkSystem 64GB TruDDR4 2666MHz (4Rx4, 1.2V) 3DS RDIMM Yes
7X77A01307 AUNF ThinkSystem 128GB TruDDR4 2666 MHz (8Rx4 1.2V) 3DS RDIMM Yes
2666 MHz UDIMMs
4ZC7A08696 B35J ThinkSystem 8GB TruDDR4 2666MHz (1Rx8, 1.2V) UDIMM No
4ZC7A08699 B35K ThinkSystem 16GB TruDDR4 2666MHz (2Rx8, 1.2V) UDIMM No
4ZC7A08700 B35L ThinkSystem 4GB TruDDR4 2666MHz (1Rx16, 1.2V) Non-ECC UDIMM No
4ZC7A08701 B35M ThinkSystem 8GB TruDDR4 2666MHz (1Rx8, 1.2V) Non-ECC UDIMM No
4ZC7A08702 B35N ThinkSystem 16GB TruDDR4 2666MHz (2Rx8, 1.2V) Non-ECC UDIMM No

Processor support

Intel Optane DC Persistent Memory is supported by these processors:

  • All second-generation Xeon Platinum (8200 series) processors
  • All Second-generation Xeon Gold (6200 and 5200 series) processors
  • The following second-generation Xeon Silver (4200 series) processor:
    • Intel Xeon Silver 4215 8C 85W 2.5GHz Processor

Note: Some servers only support a subset of the above processors with DCPMMs due to thermal limitations. Consult the relevant server product guide for specifics.

Second-generation Xeon Scalable processors are limited to the amount of memory they can address, and this memory maximum also includes DCPMMs in the calculation:

  • Processors with an L suffix (eg 8280L): 4.5 TB maximum per processor
  • Processors with an M suffix (eg 8280M): 2 TB maximum per processor
  • All other processors: 1 TB per processor

For example:

  • A configuration using 12x 64GB DIMMs per processor is a total of 768 GB, which means that neither an M nor an L processor is required
  • A configuration using 12x 256GB DIMMs per processor is a total of 3 TB, which means that an L processor is required
  • A configuration using 6x 32GB DIMMs + 6x 256GB DCPMMs is a total of 1.69 TB which means an M processor is required (an L processor may also be used)
  • A configuration using 6x 64GB DIMMs + 6x 512GB DCPMMs is a total of 3.375 TB which means an L processor is required
  • A configuration using 6x 256GB DIMMs + 6x 512GB DCPMMs is a total of 4.5 TB which means an L processor is required

Server support

Intel Optane DC Persistent Memory is only supported in second generation Intel Xeon Scalable processors.

Table 11. ThinkSystem server support - Second generation Intel Xeon Scalable processors only
Part
number
Description 1S Rack & Tower 2S Rack & Tower 4S Rack Dense/ Blade
ST50 (7Y48/7Y50)
ST250 (7Y45/7Y46)
SR150 (7Y54)
SR250 (7Y51/7Y52)
ST550 (7X09/7X10)
SR530 (7X07/7X08)
SR550 (7X03/7X04)
SR570 (7Y02/7Y03)
SR590 (7X98/7X99)
SR630 (7X01/7X02)
SR650 (7X05/7X06)
SR670 (7Y36/7Y37/7Y38)
SR850 (7X18/7X19)
SR860 (7X69/7X70)
SR950 (7X11/12/13)
SD530 (7X21)
SD650 (7X58)
SN550 (7X16)
SN850 (7X15)
4ZC7A15110 ThinkSystem 128GB TruDDR4 2666MHz (1.2V) Intel Optane DC Persistent Memory N N N N N N N Y Y Y Y N Y Y Y Y N Y Y
4ZC7A15111 ThinkSystem 256GB TruDDR4 2666MHz (1.2V) Intel Optane DC Persistent Memory N N N N N N N Y Y Y Y N Y Y Y Y N Y Y
4ZC7A15112 ThinkSystem 512GB TruDDR4 2666MHz (1.2V) Intel Optane DC Persistent Memory N N N N N N N Y Y Y Y N Y Y Y Y N Y Y
Feature B691 ThinkSystem 128GB TruDDR4 2666MHz (1.2V) Intel Optane DC Persistent Memory for SD650 N N N N N N N N N N N N N N N N Y N N
Feature B692 ThinkSystem 256GB TruDDR4 2666MHz (1.2V) Intel Optane DC Persistent Memory for SD650 N N N N N N N N N N N N N N N N Y N N
Feature B693 ThinkSystem 512GB TruDDR4 2666MHz (1.2V) Intel Optane DC Persistent Memory for SD650 N N N N N N N N N N N N N N N N Y N N

Most ThinkSystem servers have 12 DIMM slots per processor and 2 DIMMs per channel across all channels, thereby supporting 1 DCPMM in every memory channel. However, some servers have fewer slots, and as a result, not all combinations of DIMMs and DCPMMs are supported.

When all 12 DIMMs are installed, this is referred to as a "2-2-2" configuration, where each 2 corresponds to the number of DIMMs per channel in 1 memory controller. When fewer DIMMs are installed, it is referred to a "2-2-1" or "2-1-1" or similar. The table shows with combinations are supported with each ThinkSystem server.

Table 12. DIMM slots per processor
Server DIMM slots
total
Number of
DCPMMs
supported
2-2-2 support 2-2-1 support 2-1-1 support 1-1-1 support
SR570 (7Y02/7Y03) 16 4 No No Yes Yes
SR590 (7X98/7X99) 16 4 No No Yes Yes
SR630 (7X01/7X02) 24 12 Yes Yes Yes Yes
SR650 (7X05/7X06) 24 12 Yes Yes Yes Yes
SR850 (7X18/7X19) 48 24 Yes Yes Yes Yes
SR860 (7X69/7X70) 48 24 Yes Yes Yes Yes
SR950 (7X11/12/13) 96 48 Yes Yes Yes Yes
SD530 (7X21) 16 or 12* 4 (16 only) No No Yes (16 only) Yes
SD650 (7X58) 12+4** 4 No No Yes Yes
SN550 (7X16) 24 12 Yes Yes Yes Yes
SN850 (7X15) 24 12 Yes Yes Yes Yes

* For the SD530, 16 slots are available only when the narrow processor heatsink is used
** The SD650 has 16 DIMM slot total, 4 of which are reserved for use with DCPMMs

Operating system support

The following operating systems support the use of persistent memory modules:

  • Microsoft Windows Server 2019
  • Red Hat Enterprise Linux 7.6
  • SUSE Linux Enterprise Server 12.4
  • SUSE Linux Enterprise Server 15
  • VMware vSphere Hypervisor (ESXi) 6.7 U1
  • Ubuntu LTS 18.04

Warranty

The ThinkSystem Intel Optane DC Persistent Memory Modules carry a 1-year limited warranty. When installed in a supported ThinkSystem server, the DCPMMs assume the server’s base warranty and any warranty upgrades.

Resources

For more information, see these resources:

Related product families

Product families related to this document are the following:

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Lenovo®
ThinkSystem
TruDDR4

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