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

OWC

OWC 512GB (4x128GB) DDR4 2933 CL21 ECC LRDIMM memory upgrade PowerEdge C4140 CascadeLake

SKU CH-PCB3-N6A4N

512 GB DDR4 2933 ECC load-reduced LRDIMM kit of four 128 GB modules for PowerEdge C4140 CascadeLake servers

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

Capacity 512GB (4 x 128GB)

Show 4 more configurations
  • Maximise server capacity with 512GB kit
  • ECC load-reduced design ensures data integrity
  • 2933MHz speed boosts throughput for demanding workloads
  • 2V operation reduces power draw per module
  • Backward compatible with 2133, 2400 and 2666MHz systems

Server memory kit

This 512 GB kit contains four 128 GB DDR4 2933 CL21 ECC load-reduced DIMMs built for the Dell PowerEdge C4140 with Cascade Lake CPUs. The modules run at 1.2 V and use a 288-pin form factor with an 8Rx4 organisation. They are designed for server and workstation platforms that require registered ECC memory.

Load-reduced constraints

Load-reduced DIMMs reduce electrical load on the memory bus but cannot be mixed with unbuffered or standard registered ECC modules. The kit is not compatible with standard desktop computers or consumer motherboards. Backward compatibility covers 2133, 2400 and 2666 MHz speeds when the platform requires a lower data rate.

8Rx4 rank configuration

The 8Rx4 rank layout is the single specification that determines whether this kit works in the target server. The PowerEdge C4140 memory subsystem must support eight-rank load-reduced modules at this capacity. If the platform requires a different rank structure or a different memory type, the kit will not function.

Highlights

  • Maximise server capacity with 512GB kit
  • ECC load-reduced design ensures data integrity
  • 2933MHz speed boosts throughput for demanding workloads
  • 2V operation reduces power draw per module
  • Backward compatible with 2133, 2400 and 2666MHz systems

Specifications

BrandOWC
Part Number2L9D48R4512S
Capacity512GB (4 x 128GB)
Type288-Pin DDR4 ECC LRDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredLoad Reduced
Rank8Rx4
Heat SpreaderNo
Compatible SystemPowerEdge C4140 (CascadeLake CPU)

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Questions about this item

Should I pick this 512 GB kit of four 128 GB modules or a smaller capacity for my PowerEdge C4140?

This kit provides 512 GB total via four 128 GB LRDIMMs, filling four slots with the maximum per-module density listed for this CascadeLake platform.

What does the 2933 MHz rating actually deliver once installed in the server?

The modules run at DDR4 2933 (PC4-23400) with CL21 latency at 1.2 V, and will down-clock automatically to 2666, 2400 or 2133 MHz if the CPU or BIOS requires a lower speed.

How does the ECC Load-Reduced 288-pin interface affect compatibility and bandwidth limits?

The 288-pin LRDIMM format is keyed for DDR4 server boards only; it cannot be mixed with unbuffered or registered DIMMs and the 8Rx4 organisation caps usable ranks per channel to the platform limit.

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