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Green rectangular DDR4 RDIMM module with black chips and gold contacts

OWC

OWC 32GB DDR4 2666MHz ECC Registered RDIMM Memory Upgrade 2R6D42R432GB

SKU CH-J3G2-VTTFJ

32GB DDR4 2666MHz ECC registered RDIMM for Dell PowerEdge C6420, R440, R540 and T440 servers

  • Capacity32GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes

Capacity 32GB

  • 32GB capacity expands server memory for virtualization workloads
  • ECC registered design detects and corrects data errors automatically
  • DDR4 2666MHz CL19 speed matches Dell PowerEdge specifications
  • 2V low voltage reduces power draw in dense configurations
  • Validated for Dell PowerEdge C6420 R440 R540 T440 servers

Server ECC RDIMM Upgrade

This 32GB DDR4 2666MHz registered DIMM targets Dell PowerEdge C6420 R440 R540 and T440 servers needing ECC memory. It replaces Dell part numbers including A9781929 and SNPTN78YC/32G. The module is not compatible with standard desktop computers or unbuffered memory configurations.

Capacity and Headroom

The single 32GB rank provides substantial memory capacity for virtualisation and database workloads on supported platforms. Systems requiring larger aggregate memory must populate additional DIMM slots. Workloads exceeding this per-module capacity will need higher density modules or more slots.

DDR4 2666 Interface Limits

The PC4-21300 interface operates at 2666MHz with CL19 latency and 1.2V. Backward compatibility covers 2133MHz and 2400MHz bus speeds. Maximum throughput and rank population limits are defined by the server memory controller not by this module alone.

Highlights

  • 32GB capacity expands server memory for virtualization workloads
  • ECC registered design detects and corrects data errors automatically
  • DDR4 2666MHz CL19 speed matches Dell PowerEdge specifications
  • 2V low voltage reduces power draw in dense configurations
  • Validated for Dell PowerEdge C6420 R440 R540 T440 servers

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 SystemDell PowerEdge C6420
Dell PowerEdge R440
Dell PowerEdge R540
Dell PowerEdge T440

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Questions about this item

Will this 2666 MHz ECC RDIMM run reliably alongside my existing 2133 MHz Dell PowerEdge R440 modules?

Yes, the module is backward compatible with 2133 MHz and 2400 MHz speeds, so it will operate at the lower frequency when mixed with slower DIMMs in the R440.

How can I confirm the 32 GB registered DIMM is detected and ECC is active after installation?

Enter the server BIOS or iDRAC interface; the memory configuration screen should show 32 GB per module at 2666 MHz with ECC status reported as enabled.

Does the 2R6D42R432GB box include any mounting hardware or do I need to buy a Dell rail kit separately?

The package contains only the 288-pin DDR4 ECC registered DIMM itself; no rails, screws or additional accessories are supplied.

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