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Four green DDR4 RDIMM modules with gold contacts and black chips, no heat spreaders

OWC

OWC 512GB (4x128GB) DDR4 2933 CL21 ECC Registered RDIMM PowerEdge C4140 memory upgrade

SKU CH-1ET2-AHABD

512 GB DDR4 2933 CL21 ECC registered RDIMM kit of four 128 GB modules for PowerEdge C4140 servers

  • Capacity512GB (4 x 128GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes

Capacity 512GB (4 x 128GB)

Show 4 more configurations
  • 512GB total capacity from four 128GB modules expands server memory headroom
  • DDR4 2933 speed with CL21 latency delivers high-throughput registered performance
  • ECC registered design detects and corrects data errors for workload reliability
  • 2V operation reduces power draw compared to higher-voltage server DIMMs
  • Backward compatible with 2133, 2400 and 2666MHz platforms for flexible deployment

Server-grade ECC RDIMM kit

This 512GB kit contains four 128GB DDR4 2933 CL21 registered DIMMs built for the PowerEdge C4140 with SkyLake CPUs. The modules are JEDEC-standard 288-pin ECC registered RDIMMs operating at 1.2V. They are designed for workstation and server platforms that require registered memory with error correction. This kit will not work in standard desktop computers or systems that use unbuffered or load-reduced DIMMs.

Sustained enterprise workloads

Registered buffering and ECC correction maintain data integrity during continuous multi-threaded operation across all four modules. The 8Rx4 organisation and CL21 timing provide stable throughput at the rated 2933 MT/s without the signal degradation seen in unbuffered configurations under heavy load. Backward compatibility with 2133, 2400 and 2666 MT/s allows the kit to run reliably at lower speeds if the platform requires it.

128GB per module density

Each of the four DIMMs delivers 128GB in a single 8Rx4 rank, so the total 512GB capacity is reached without exceeding the C4140's slot count. Buyers who need higher per-slot density or who must populate every available slot with the maximum supported module size should verify the platform's qualified vendor list before purchasing.

Highlights

  • 512GB total capacity from four 128GB modules expands server memory headroom
  • DDR4 2933 speed with CL21 latency delivers high-throughput registered performance
  • ECC registered design detects and corrects data errors for workload reliability
  • 2V operation reduces power draw compared to higher-voltage server DIMMs
  • Backward compatible with 2133, 2400 and 2666MHz platforms for flexible deployment

Specifications

BrandOWC
Part Number2R9D48R4512S
Capacity512GB (4 x 128GB)
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank8Rx4
Heat SpreaderNo
Compatible SystemPowerEdge C4140 (SkyLake CPU)

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Questions about this item

How much power does each 128 GB module draw at the rated 1.2 V?

Each module operates at 1.2 V, the standard DDR4 voltage, keeping power draw low during continuous server workloads.

What motherboard features are required to use this 4 x 128 GB kit?

The motherboard must provide 288-pin DDR4 slots that support ECC Registered RDIMMs and 8Rx4 organisation, as used in the PowerEdge C4140.

Will these 2933 MHz modules run stably in a system that currently uses 2400 MHz DDR4?

Yes, the modules are backward compatible with 2133, 2400 and 2666 MHz speeds and will down-clock automatically.

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