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Green circuit board with gold edge contacts and black memory chips

OWC

OWC 128GB DDR4 3200MHz CL22 1.2V 288pin ECC Registered RDIMM Memory Upgrade

SKU CH-NBC2-ETJDB

128 GB DDR4 ECC registered server memory at 3200 MHz CL22, validated for Supermicro H12 series motherboards

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

Capacity 128GB

  • 128GB capacity extends server memory headroom
  • DDR4 3200MHz speed supports high-throughput workloads
  • ECC registered design protects data integrity
  • 2V operation reduces power draw per module
  • Validated for Supermicro H12 series motherboards

OWC 128GB DDR4 ECC Registered RDIMM

This OWC module delivers 128GB of DDR4 memory at 3200MHz with CL22 latency and 1.2V operation. It uses a 288-pin registered ECC design built for server and workstation platforms. The part number is 3R2D44R4128G and it carries a 4Rx4 rank configuration.

Suited for Supermicro H12 series motherboards

This memory fits Supermicro H12DST-B, H12DSU-iN, H12SSL-C, H12SST-PS and H12SSL-i motherboards. It will not work in standard desktop computers and cannot be mixed with unbuffered modules. Builders needing non-ECC or unregistered memory should choose a different product.

128GB capacity for heavy server workloads

The single-module 128GB density provides substantial headroom for virtualisation, large databases and memory-intensive compute tasks. Systems limited to lower per-slot capacities or requiring unbuffered memory cannot use this module.

How it compares

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

Price $717.99
Pricier than about 56% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $5.61 per GB
Cheaper than about 69% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number3R2D44R4128G
Total capacity128 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latencyCL22
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSupermicro Motherboard H12DST-B
Supermicro Motherboard H12DSU-iN
Supermicro Motherboard H12SSL-C
Supermicro Motherboard H12SST-PS
Supermicro Motherboard H12SSL-i

Other versions of this model

5 more in the same range

Questions about this item

What motherboard must I already have to use this OWC 128GB DDR4 3200MHz CL22 ECC Registered RDIMM?

This module is validated for Supermicro motherboards H12DST-B, H12DSU-iN, H12SSL-C, H12SST-PS and H12SSL-i; it will not work in standard desktop boards.

Can I keep my existing unbuffered DDR4 DIMMs and add this registered ECC kit alongside them?

No, registered ECC memory cannot be mixed with unbuffered DIMMs; all slots must use registered ECC modules of matching specification.

How do I confirm the 128GB 3200MHz CL22 1.2V 4Rx4 configuration is recognised after installation?

Check the BIOS memory information or run dmidecode — it should report 128GB, DDR4 3200, CL22, 1.2V, ECC registered, 4Rx4 organisation.

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