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Green rectangular circuit board with gold edge contacts and black memory chips on both sides

OWC

OWC 3L2D44R4128G 128GB DDR4 3200MHz CL22 4Rx4 ECC LRDIMM 1.2V 288-pin server RAM

SKU CH-8AA4-99780

Single 128GB DDR4 3200MHz CL22 4Rx4 ECC load-reduced LRDIMM for servers, workstations and NAS, backward compatible to 2133, 2400, 2666 and 2933MHz

  • Total capacity128 GB
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latencyCL22
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Memory rank4Rx4

Capacity 128GB

  • 128GB single-module capacity scales server memory density
  • 3200MHz DDR4 speed with CL22 latency boosts throughput
  • ECC load-reduced design protects data integrity under load
  • 2V operation cuts power draw per module
  • Backward compatible with 2133, 2400, 2666, 2933MHz systems

Server-grade 128GB DDR4 LRDIMM

This module is a 128GB DDR4 3200MHz PC4-25600 CL22 4Rx4 ECC Load Reduced LRDIMM operating at 1.2V on a 288-pin form factor. It is built for servers, workstations and NAS systems that require registered ECC memory with load-reduced buffering. The single-module capacity allows high density per slot without mixing ranks.

Suited for capacity-hungry server builds

It fits administrators expanding memory in compatible DDR4 platforms that support LRDIMM topology and 4Rx4 organisation. Buyers needing unbuffered UDIMMs or standard desktop SO-DIMMs cannot use this module. Systems limited to lower maximum densities per slot or those that forbid mixing LRDIMM with RDIMM should look elsewhere.

128GB single-module density

The 128GB capacity per DIMM is the decisive specification; it determines whether the platform’s memory controller and BIOS support such density in a 4Rx4 load-reduced configuration. Backward compatibility with 2133, 2400, 2666 and 2933MHz speeds eases deployment in mixed-speed environments.

How it compares

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

Price $780.99
Pricier than about 77% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $6.10 per GB
Cheaper than about 63% 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 number3L2D44R4128G
Total capacity128 GB
Product type288-Pin DDR4 ECC LRDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latencyCL22
ECC supportYes
Buffer typeLoad Reduced
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

5 more in the same range

Questions about this item

How do I install this 288-pin DDR4 LRDIMM and what step do people miss?

Power down the server, open the chassis, align the notch on the 288-pin DDR4 LRDIMM with the slot key, press firmly until both latches click, then confirm in BIOS that the module registers at 3200MHz CL22 — the step most people miss is verifying the speed and ECC mode in firmware after seating the module

What maintenance or replacement will this 128GB 4Rx4 ECC LRDIMM need later?

No routine maintenance is required for the 128GB 4Rx4 ECC LRDIMM; if a correctable error count rises or the module fails POST, replace the individual 128GB stick — ECC load-reduced design means the module itself is the only field-replaceable memory component

What limit appears first under sustained load with this 1.2V CL22 DDR4 3200 module?

The CAS latency of CL22 at 3200MHz sets the timing ceiling; under sustained heavy throughput the memory controller will hit the CL22 timing budget before voltage or thermal limits become a factor on this 1.2V DDR4 LRDIMM

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