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Eight green DDR4 RDIMM modules in a row

OWC

OWC 512GB (8×64GB) DDR4 2933 ECC Registered RDIMM Kit for PowerEdge C4140

SKU CH-YZBD-JZ390

A 512 GB kit of eight 64 GB DDR4 2933 ECC registered RDIMMs validated for the PowerEdge C4140

  • Capacity512GB (8 x 64GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes

Capacity 512GB (8 x 64GB)

Show 4 more configurations
  • 512 GB capacity across eight 64 GB modules
  • DDR4 2933 MHz speed rated PC4-23400 CL21
  • ECC registered design detects and corrects data errors
  • 2 V operation reduces server power draw
  • JEDEC and RoHS compliant for warranty-safe upgrades

Server Memory Kit

This OWC kit supplies 512GB of DDR4 memory across eight 64GB registered DIMMs. It is built for the Dell PowerEdge C4140 server platform running SkyLake CPUs. The modules are ECC registered and will not work in standard desktop computers or alongside unbuffered or load-reduced memory.

Thermals and Power

Each module operates at 1.2V without a heat spreader, relying on the server’s directed airflow for cooling. Registered buffering reduces electrical load on the memory controller, helping keep power draw predictable under sustained workloads. The JEDEC-standard design ensures stable operation within the system’s thermal envelope.

Deciding Specification

The kit uses a 4Rx4 rank organisation and CL21 latency at DDR4 2933 (PC4-23400). This specific rank configuration must match the C4140’s memory-subsystem requirements; systems needing a different rank structure or unbuffered DIMMs cannot use this upgrade.

Highlights

  • 512 GB capacity across eight 64 GB modules
  • DDR4 2933 MHz speed rated PC4-23400 CL21
  • ECC registered design detects and corrects data errors
  • 2 V operation reduces server power draw
  • JEDEC and RoHS compliant for warranty-safe upgrades

Specifications

BrandOWC
Part Number2R9D44R4512K
Capacity512GB (8 x 64GB)
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
Heat SpreaderNo
Compatible SystemPowerEdge C4140 (SkyLake CPU)

Other versions of this model

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Questions about this item

How do I install the 8×64GB DDR4 2933 RDIMMs in the PowerEdge C4140 and what step is often missed?

Power down the server, open the chassis, and seat each 288-pin module firmly until the ejector clips lock; the step often missed is verifying in BIOS that all 512GB are recognised at 2933MHz CL21 before closing the case.

What maintenance or replacement will this 512GB ECC registered kit need over its service life?

No routine maintenance is required; if a module fails, replace the individual 64GB 4Rx4 RDIMM — do not mix with unbuffered or load-reduced DIMMs.

What limit appears first when the kit runs at full 2933MHz load for extended periods?

The 1.2V power envelope and CL21 latency ceiling are reached before thermal throttling, since the modules have no heat spreaders.

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