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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

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Memory rank8Rx4

Capacity 512GB (4 x 128GB)

Show 4 more
  • 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.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $2,689.99
Pricier than about 72% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $5.25 per GB
Cheaper than about 73% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2L9D48R4512S
Total capacity512 GB (4 × 128 GB)
Product type288-Pin DDR4 ECC LRDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeLoad Reduced
Memory rank8Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsPowerEdge C4140 (CascadeLake CPU)

Other versions of this model

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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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