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Two green DDR4 RDIMM sticks, black chips, no heat spreader

OWC

OWC 128GB (2x64GB) DDR4 3200MHz PC4-25600 CL22 2RX4 ECC Registered RDIMM 1.2V 288-pin Server RAM

SKU CH-PMAK-DEGN9

128GB dual-channel DDR4-3200 ECC registered RDIMM kit with CL22 latency and 1.2V operation for server workloads

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latencyCL22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 128GB (2 x 64GB)

Show 4 more

Rank 2Rx4

  • ECC registered design protects data integrity in servers
  • 128 GB dual-channel kit expands memory capacity
  • DDR4 3200 speed delivers high bandwidth
  • 2 V operation reduces power consumption
  • JEDEC compliant modules ensure broad compatibility

Server ECC RDIMM upgrade

This OWC kit provides 128 GB of DDR4 ECC Registered memory in a matched pair of 64 GB modules. It is built for workstations and servers that require error-correcting registered DIMMs and will not operate in standard desktop computers or alongside unbuffered memory.

128 GB dual-channel capacity

Two 64 GB sticks run at DDR4 3200 (PC4-25600) with CL22 latency and a 2Rx4 organisation, giving ample headroom for virtualisation, large databases and multi-application workloads. The registered buffer adds a small command-cycle overhead that limits peak bandwidth compared with unbuffered equivalents.

Low-voltage thermal profile

Modules operate at 1.2 V without heat spreaders, relying on chassis airflow for cooling. Power draw stays modest under typical server loads, and the absence of tall heatsinks avoids clearance issues in dense 288-pin DIMM slots.

How it compares

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

Price $749.99
Pricier than about 76% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $5.86 per GB
Cheaper than about 65% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number3R2D42R4128P
Total capacity128 GB (2 × 64 GB)
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latencyCL22
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

5 more in the same range

Questions about this item

Will this DDR4 3200MHz CL22 2Rx4 ECC registered kit run alongside my existing DDR4 3200MHz CL22 2Rx4 ECC registered RDIMMs?

Mixing modules of identical speed, latency, rank, voltage and ECC type is the recommended practice; this kit is 3200MHz CL22 2Rx4 at 1.2V and registered.

How can I verify the 128GB dual-channel kit is detected at 3200MHz with ECC active after installation?

Enter the server BIOS or UEFI and confirm total capacity shows 128GB, speed reads 3200MT/s, and ECC status is enabled for each DIMM slot.

Does the package contain only the two 64GB 288-pin RDIMMs, or are any brackets, cables or tools included?

The box holds the two 64GB DDR4 3200MHz PC4-25600 CL22 2Rx4 ECC registered RDIMMs; no heat spreaders, brackets, cables or installation tools are supplied.

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