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Green 288-pin DDR4 LRDIMM module, no heat spreader, gold contacts

OWC

OWC 64GB DDR4 2933 CL21 4Rx4 ECC LRDIMM server RAM

SKU CH-XS5M-8MXGN

A 64GB DDR4 2933 CL21 4Rx4 ECC LRDIMM module for server and workstation memory upgrades

  • Total capacity64 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Memory rank4Rx4
  • 64 GB capacity lets you run more virtual machines and large datasets
  • DDR4 2933 MHz speed with CL21 latency keeps data flowing to multi-core CPUs
  • ECC load-reduced design corrects errors and reduces electrical load for stable 24/7 operation
  • 2 V JEDEC standard voltage cuts power draw in dense server chassis
  • Backward compatible with 2133, 2400 and 2666 MHz systems for flexible deployment

64GB ECC LRDIMM server memory

This OWC module provides 64GB of DDR4 2933 ECC Load-Reduced memory for servers and workstations. It uses a 288-pin LRDIMM form factor with CL21 latency and 1.2V operation. The quad-rank 4Rx4 design helps maximise capacity in supported platforms.

Suits Fujitsu-compatible servers, not desktops

This memory fits systems that accept DDR4 ECC LRDIMMs such as the listed Fujitsu part numbers. It will not work in standard desktop computers or motherboards that require unbuffered or registered ECC DIMMs. Builders needing consumer memory should choose a different type.

Quad-rank 4Rx4 LRDIMM requirement

The module uses a 4Rx4 Load-Reduced organisation that the memory controller must support. Mixing with unbuffered or registered ECC DIMMs is not possible. Verify that your platform accepts 4Rx4 LRDIMMs before purchase.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $423.99
Pricier than about 67% of the 6,523 comparable items (median $188.99).
Total capacity 64 GB
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $6.62 per GB
Cheaper than about 57% of the 6,064 comparable items (median $7.25 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number2L9D44R464 GB
Total capacity64 GB
Product type288-Pin DDR4 ECC LRDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeLoad Reduced
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.2 V

Questions about this item

Will the OWC 64GB DDR4 2933 CL21 4Rx4 ECC LRDIMM work in a standard desktop motherboard?

No, this ECC load-reduced DIMM is designed for servers and workstations only and will not function in standard desktop computers.

Can I mix this 64GB LRDIMM with existing ECC registered DIMMs in my server?

No, the manufacturer highlights state it cannot be mixed with unbuffered or ECC registered memory; all slots must use load-reduced modules.

How can I verify the module is running at the correct 2933MHz speed after installation?

Check the system BIOS or use a hardware monitoring tool to confirm the memory operates at PC4-23400 2933MHz CL21.

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