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Green rectangular DDR4 RDIMM circuit board with black memory chips and gold edge connectors

OWC

OWC 2R9D42R816GB 16GB DDR4 2933MHz CL21 ECC Registered RDIMM memory upgrade

SKU CH-DCFS-CG2RA

16 GB DDR4 2933 MHz ECC registered RDIMM for Lenovo ThinkAgile HX3720, HX3721 and VX3720 servers

  • Capacity16GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes

Capacity 16GB

  • ECC protection ensures data integrity for server workloads
  • 16GB capacity expands memory for virtualization and databases
  • 2933MHz DDR4 speed matches ThinkAgile platform specifications
  • Registered design supports stable multi-DIMM configurations
  • 2V operation reduces power draw in dense deployments

Product identity and intended use

This OWC module is a 16GB DDR4 2933MHz CL21 ECC Registered RDIMM designed for server and workstation upgrades. It operates at 1.2V using a 288-pin interface and carries a 2Rx8 rank configuration. The part is validated for Lenovo ThinkAgile systems including the HX3720, HX3721 and VX3720 models.

Suitable systems and mismatched needs

This memory suits administrators expanding Lenovo ThinkAgile servers that require registered ECC DDR4. It will not work in standard desktop computers or consumer laptops that accept only unbuffered non-ECC modules. Buyers needing unbuffered memory for a regular PC should look elsewhere.

Deciding specification

The registered ECC buffer is the single attribute that determines compatibility. Only platforms designed for registered DDR4 DIMMs can use this module; systems requiring unbuffered memory will not post with it installed.

Highlights

  • ECC protection ensures data integrity for server workloads
  • 16GB capacity expands memory for virtualization and databases
  • 2933MHz DDR4 speed matches ThinkAgile platform specifications
  • Registered design supports stable multi-DIMM configurations
  • 2V operation reduces power draw in dense deployments

Specifications

BrandOWC
Part Number2R9D42R816GB
Capacity16GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx8
Heat SpreaderNo
Compatible SystemLenovo ThinkAgile (Xeon SP Gen 2) HX3720
Lenovo ThinkAgile (Xeon SP Gen 2) HX3721
Lenovo ThinkAgile (Xeon SP Gen 2) VX3720

Other versions of this model

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Questions about this item

Which Lenovo ThinkAgile models must I already own for this 16GB DDR4 2933MHz ECC RDIMM to work?

This module is validated for Lenovo ThinkAgile HX3720, HX3721 and VX3720 systems built on Xeon SP Gen 2 platforms.

Can I keep my existing 2133MHz, 2400MHz or 2666MHz DDR4 ECC Registered DIMMs and add this 2933MHz CL21 stick?

Yes, the module is backward compatible with 2133MHz, 2400MHz and 2666MHz speeds, but all populated slots will run at the lowest common frequency.

How do I confirm the 2Rx8 registered ECC module is detected at 2933MHz with CL21 timing after installation?

Check the system BIOS or UEFI memory information screen; it should report 16GB, 2933MHz, CL21, 1.2V and registered ECC status.

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