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Green bare circuit board 288pin DDR4 RDIMM module

OWC

OWC 32GB DDR4 2666MHz ECC Registered RDIMM memory upgrade

SKU CH-RAEC-R3MFY

32GB DDR4 2666MHz ECC registered RDIMM for Lenovo ThinkAgile Xeon SP Gen 1 servers

  • Capacity32GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes
  • 32GB capacity expands server memory for larger workloads
  • DDR4 2666MHz speed with CL19 latency delivers responsive data access
  • ECC registered design detects and corrects memory errors for reliability
  • 2V operation reduces power draw in dense configurations
  • Validated for Lenovo ThinkAgile HX7520 HX7521 HX7820 HX7821 NX2320 systems

System-specific server memory

This 32GB DDR4 ECC Registered RDIMM is built for Lenovo ThinkAgile systems using first-generation Xeon Scalable processors. It targets administrators who need to expand capacity in HX7520, HX7521, HX7820, HX7821 or NX2320 servers. The module will not work in standard desktop computers or with unbuffered memory.

DDR4 2666 registered limits

The stick runs at 2666MHz with CL19 latency and 1.2V, conforming to the PC4-21300 JEDEC standard. Registered buffering adds one clock cycle of delay versus unbuffered DIMMs, a trade-off required for signal integrity at higher densities. Backward compatibility lets it operate at 2133MHz or 2400MHz if the platform demands it. Mixing registered and unbuffered modules is not supported.

Replaces Lenovo 4X70P98203 and 7X77A01304

This module directly substitutes the listed Lenovo part numbers, letting you add 32GB per slot without changing firmware or BIOS settings. The upgrade is worthwhile when existing DIMMs are smaller or when empty slots are available in a qualified ThinkAgile chassis. It does not suit systems that require load-reduced or unbuffered memory.

Highlights

  • 32GB capacity expands server memory for larger workloads
  • DDR4 2666MHz speed with CL19 latency delivers responsive data access
  • ECC registered design detects and corrects memory errors for reliability
  • 2V operation reduces power draw in dense configurations
  • Validated for Lenovo ThinkAgile HX7520 HX7521 HX7820 HX7821 NX2320 systems

Specifications

BrandOWC
Part Number2R6D42R432GB
Capacity32GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Compatible SystemLenovo ThinkAgile (Xeon SP Gen 1) HX7520
Lenovo ThinkAgile (Xeon SP Gen 1) HX7521
Lenovo ThinkAgile (Xeon SP Gen 1) HX7820
Lenovo ThinkAgile (Xeon SP Gen 1) HX7821
Lenovo ThinkAgile (Xeon SP Gen 1) NX2320

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Questions about this item

Should I choose the 32GB DDR4 2666MHz ECC Registered RDIMM or a different capacity for my ThinkAgile HX7520?

This module provides 32GB per DIMM at DDR4 2666 CL19. Match the total capacity to your workload and the number of available slots in the HX7520, HX7521, HX7820, HX7821 or NX2320.

What does the 2666MHz rating deliver once installed in a ThinkAgile server?

The module runs at DDR4 2666 (PC4-21300) with CL19 latency at 1.2V. If the platform operates at 2133MHz or 2400MHz, the DIMM will downclock automatically to match the system speed.

How does the DDR4 288-pin ECC Registered interface affect compatibility?

The 288-pin ECC Registered RDIMM format is required for the listed ThinkAgile Xeon SP Gen 1 models. It cannot be mixed with unbuffered memory and will not fit standard desktop boards.

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