Lenovo Thinksystem 4zc7a15121 Memory Module Reference User's Guide

Lenovo ThinkSystem 4ZC7A15121 Memory Module

Reference Information

ThinkSystem TruDDR5 and TruDDR4 memory delivers trusted, tested, quality, performance, and reliability throughout the ThinkSystem portfolio. We use the highest quality industry-standard memory components sourced from Tier 1 DRAM suppliers. The only memory that meets these strict requirements is selected for memory in Lenovo servers. It is then compatibility tested and tuned on every

ThinkSystem server to maximize reliability. In addition, Lenovo memory DIMMs for servers have a unique signature programmed into them so your system can verify that TruDDR4 Memory is installed in your system. Since the memory will be authenticated, memory stretch goals are enabled only when TruDDR4 Memory DIMMs are detected. Together with lower power consumption, these new DIMMs can provide the lowest TCO for data centers.

Figure 1. Lenovo TruDDR4 Memory DIMM

High-Performance Memory

Lenovo offers high-performance and high-capacity memory options in ThinkSystem servers.

• Persistent Memory
  Lenovo ThinkSystem servers configured with Intel Optane Persistent Memory transforms the memory/storage hierarchy enabling faster insights from data. This breakthrough technology delivers large capacity, high speed, affordable memory with data persistence and advanced encryption capabilities. These modules significantly increase the capacity of available system memory, keeping more hot data closer to the CPU, and enabling greater operational efficiency by processing larger data sets with more user instances.
• 3DS RDIMMs
  To meet the ever increasing demand for higher density server memory modules, Lenovo offers 3DS (3 Dimensional Stacked) DDR4 RDIMMs which apply TSV (Through Silicon Via) technology from our partnership with a leading Tier 1 DRAM supplier. The new TSV 3DS stack technology enables higher density DRAM stack packages with higher operational frequency and reduced power consumption. The RDIMM configuration along with 3DS TSV DRAM packages exhibits performance benefits and lower power consumption over alternative high density solutions to ultimately provide the lowest TCO for data centers.

Part Number Information

The following tables list the ordering information:

• 4800 MHz DDR5 memory for Intel servers
• 4800 MHz DDR5 memory for AMD servers
• 3200 MHz DDR4 memory for Intel servers
• 3200 MHz DDR4 memory for AMD servers
• 2933 MHz DDR4 memory for Intel servers
• 2933 MHz DDR4 memory for AMD servers
• 2666 MHz DDR4 memory
• Intel Optane Persistent Memory 200 Series (3200 MHz)
• Intel Optane Persistent Memory 100 Series (2666 MHz)

4800 MHz DDR5 memory for Intel servers
Table 1. 4800 MHz DDR5 memory for Intel servers

9×4 RDIMMs (also known as Optimized or EC4 RDIMMs) are a new lower-cost DDR5 memory option supported in ThinkSystem V3 servers. 9×4 DIMMs offer the same performance as standard RDIMMs (known as 10×4 or EC8 modules), however they support lower fault-tolerance characteristics. Standard RDIMMs and 3DS RDIMMs support two 40-bit subchannels (that is, a total of 80 bits), whereas 9×4 RDIMMs support two 36-bit subchannels (a total of 72 bits). The extra bits in the subchannels allow standard RDIMMs and 3DS RDIMMs to support Single Device Data Correction (SDDC), however 9×4 RDIMMs do not support SDDC. Note, however, that all DDR5 DIMMs, including 9×4 RDIMMs, support Bounded Fault correction, which enables the server to correct most common types of DRAM failures.
For more information on DDR5 memory, see the Lenovo Press paper, Introduction to DDR5 Memory, available from https://lenovopress.com/lp1618.
4800 MHz DDR5 memory for AMD servers
Table 2. 4800 MHz DDR5 memory for AMD servers

9×4 RDIMMs (also known as Optimized or EC4 RDIMMs) are a new lower-cost DDR5 memory option supported in ThinkSystem V3 servers. 9×4 DIMMs offer the same performance as standard RDIMMs (known as 10×4 or EC8 modules), however they support lower fault-tolerance characteristics. Standard RDIMMs and 3DS RDIMMs support two 40-bit subchannels (that is, a total of 80 bits), whereas 9×4 RDIMMs support two 36-bit subchannels (a total of 72 bits). The extra bits in the subchannels allow standard RDIMMs and 3DS RDIMMs to support Single Device Data Correction (SDDC), however 9×4 RDIMMs do not support SDDC. Note, however, that all DDR5 DIMMs, including 9×4 RDIMMs, support Bounded Fault correction, which enables the server to correct most common types of DRAM failures.
For more information on DDR5 memory, see the Lenovo Press paper, Introduction to DDR5 Memory, available from https://lenovopress.com/lp1618.

3200 MHz DDR4 memory for Intel servers

Table 3. 3200 MHz TruDDR4 DIMMs for Intel processor-based servers

3200 MHz DDR4 memory for AMD servers
Table 4. 3200 MHz TruDDR4 DIMMs for AMD processor-based servers

2933 MHz DDR4 memory for Intel servers
Table 5. 2933 MHz TruDDR4 DIMMs for Intel processor-based servers

2933 MHz DDR4 memory for AMD servers
Table 6. 2933 MHz TruDDR4 DIMMs for AMD processor-based servers

2666 MHz DDR4 memory

Table 7. 2666 MHz TruDDR4 DIMM ordering information

Intel Optane Persistent Memory 200 Series (3200 MHz)
Table 8. Intel Optane Persistent Memory 200 Series – 3200 MHz

Intel Optane Persistent Memory 100 Series (2666 MHz)
Table 9. Intel Optane Persistent Memory 100 Series – 2666 MHz

* Configure-to-order only, not available as a field upgrade.

Server Support

Configurations notes:
Some 2666 MHz memory is only supported with Gen 1 Xeon Scalable processors (codenamed “Skylake”), whereas other 2666 MHz memory is only supported with Gen 2 Xeon Scalable processors (codenamed “Cascade Lake”). These are indicated with the (1) and (2) footnotes in the table, respectively.

• 2933 MHz memory is not supported by Intel Xeon SP Gen 1 processors
• The support of 32GB UDIMMs on ST50, ST250, SR150 and SR250 requires a Intel Xeon E Series processor and UEFI firmware ISE114H or later
• 2666 MHz Persistent Memory is only supported by Intel Xeon SP Gen 2 processors
• 3200 MHz Persistent Memory is only supported by Intel Xeon SP Gen 3 processors
• Some servers support mixing memory speeds; all memory will operate at the lowest speed

Note: Lenovo branded memory shipped as option part numbers, as FRU service parts, or installed in the factory as part of a CTO order, may contain memory parts that exceed the technical specification of what is printed on the DIMM label or is stated in the DIMM ordering information. Your server’s system UEFI firmware may need to be updated to support such DIMMs. See Lenovo Support Tip HT509191 for additional information.
The following tables list the ThinkSystem servers that are compatible, grouped by server form factor or processor – Part 1, Part 2 and Part 3.
Table 10. Server Support (Part 1 of 3)

Table 11. Server Support (Part 2 of 3)

Table 11. Server Support (Part 2 of 3)

1. Only supported with second-generation Intel Xeon Scalable processors (“Cascade Lake”) and not supported with first-generation Intel Xeon Scalable processors (“Skylake”)
2. Supported in the SR635 and SR655 only with an EPYC 7002 processor. Not supported with an EPYC 7003 processor.
3. Only supported with first-generation Intel Xeon Scalable processors (“Skylake”) and not supported with second-generation Intel Xeon Scalable processors (“Cascade Lake”)

Table 12. Server Support (Part 3 of 3)

1. Only supported with second-generation Intel Xeon Scalable processors (“Cascade Lake”) and not supported with first-generation Intel Xeon Scalable processors Skylake”)
2. Only supported with first-generation Intel Xeon Scalable processors (“Skylake”) and not supported with second-generation Intel Xeon Scalable processors (“Cascade Lake”)

Operating system support

Most memory is operating system independent, however, Persistent Memory is supported only by specific operating systems as listed in the following tables:

• Intel Optane Persistent Memory 200 Series
• Intel Optane Persistent Memory 100 Series

Table 13. Operating system support for ThinkSystem 128GB TruDDR4 3200MHz (1.2V) Intel Optane Persistent Memory, 4ZC7A08732

Table 14. Operating system support for ThinkSystem 128GB TruDDR4 2666MHz (1.2V) Intel® Optane™ DC Persistent Memory, 4ZC7A15110

1. This item is not a general stand-alone option for Lenovo ThinkSystem SD650 (Xeon SP Gen 2), and M/T 7X58 (Xeon SP Gen 2). 2. For the OS support matrix, pls refer to LeSI Best Recipe. 3. This item shall be installed/removed by a Lenovo support rep only.
2. When OCPMM (AEP) is installed, the maximum ambient temperature can be 30 °C. When operating above 30 °C, or in the event of a fan failure, the server will continue to function as long as all component temperature requirements are met, however, there may be performance reductions. Detail information please refer to Support Tip HT508512

Learn More
For more information, see these resources:

• Intel Optane DC Persistent Memory product guide:https://lenovopress.com/lp1066-intel-optane-dc-persistent-memory
• Optimizing Memory Performance of Lenovo ThinkSystem Servers:https://lenovopress.com/lp0697-optimizing-memory-performance-of-lenovo-thinksystem-servers
• Lenovo ThinkSystem SD530 Performance Considerations with 12 DIMMs and 16 DIMMs:https://lenovopress.com/lp0659-thinksystem-sd530-performance-considerations
• ThinkSystem Memory Configurator:https://dcsc.lenovo.com/#/memory_configuration

Related product families

Product families related to this document are the following:

• Memory

Notices

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Any references in this publication to non-Lenovo Web sites are provided for convenience only and do not in any manner serve as an endorsement of those Web sites. The materials at those Web sites are not part of the materials for this Lenovo product, and use of those Web sites is at your own risk. Any performance data contained herein was determined in a controlled environment. Therefore, the result obtained in other operating environments may vary significantly. Some measurements may have been made on development-level systems and there is no guarantee that these measurements will be the same on generally available systems. Furthermore, some measurements may have been estimated through extrapolation. Actual results may vary. Users of this document should verify the applicable data for their specific environment.

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This document, LP1021, was created or updated on February 14, 2023.

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• TruDDR4

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