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OWC

OWC 128GB (4x32GB) DDR4 2133MHz CL15 ECC Registered RDIMM 1.2V 288-pin server RAM

SKU CH-DDAB-BD99R

A 128GB kit of four 32GB DDR4 2133MHz CL15 ECC registered RDIMMs at 1.2V for servers and workstations

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR4 2133 (PC4 17000)
  • CAS latencyCL15
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 128GB (4 x 32GB)

Rank 2Rx4

  • ECC registered design protects data integrity in critical workloads
  • 128 GB total capacity across four 32 GB modules enables large memory configurations
  • DDR4 2133 MHz CL15 at 1.2 V delivers standard server performance
  • 288-pin RDIMM form factor fits compatible server and workstation slots
  • JEDEC compliant and RoHS certified for warranty-safe upgrades

Server-ready ECC RDIMM kit

This 128GB kit contains four 32GB DDR4 2133MHz CL15 registered DIMMs built for servers, workstations and NAS systems. ECC and registered buffering protect data integrity in multi-socket environments. The modules run at 1.2V and conform to JEDEC PC4-17000 specifications. They are not compatible with standard desktop platforms or unbuffered memory.

Sustained-load behaviour

Registered buffering reduces electrical load on the memory controller, helping stability when all channels are populated under continuous workloads. ECC corrects single-bit errors in real time without halting the system. CL15 latency at 2133MHz delivers predictable throughput for virtualisation, database and file-service tasks. The 2Rx4 organisation supports dense capacity per channel.

Build and connectivity

Each module uses a 288-pin DDR4 RDIMM form factor without a heat spreader, fitting standard server DIMM slots. The four-module pack enables dual-channel or quad-channel population depending on the platform. JEDEC and RoHS compliance ensures a warranty-safe upgrade for OEM-qualified systems. No additional cables or brackets are required.

How it compares

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

Price $797.99
Pricier than about 77% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $6.23 per GB
Cheaper than about 61% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number2R1D42R4128S
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2133 (PC4 17000)
Memory
CAS latencyCL15
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

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Questions about this item

Does the 1.2V DDR4 2133MHz kit run hot or draw extra power under continuous server loads?

The modules operate at the standard 1.2V DDR4 voltage with no heat spreader, so thermal output and power draw stay within normal JEDEC limits for registered ECC DIMMs.

What must my motherboard already support for these 288-pin 2Rx4 registered DIMMs to function?

Your board needs DDR4 RDIMM slots, registered ECC support and a memory controller qualified for 2Rx4 organisation at 2133MHz.

Can I add this 128GB quad-kit alongside older DDR4 2133MHz unbuffered ECC sticks I already own?

No — registered and unbuffered ECC DIMMs cannot be mixed on the same platform; all slots must use registered modules.

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