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Green bare circuit board with black memory chips and gold edge connector

OWC

OWC 128GB DDR4 3200MHz CL22 4Rx4 ECC Registered RDIMM 1.2V 288-pin server RAM

SKU CH-XXDB-C21V8

A single 128 GB DDR4 module running at 3200 MHz with ECC and registered buffering for server workloads

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

Capacity 128GB

Show 4 more

Rank 4Rx4

  • 128GB capacity in a single module
  • ECC registered for data integrity in servers
  • DDR4 3200MHz speed with CL22 latency
  • 2V operation meets JEDEC standard
  • 288-pin 4Rx4 RDIMM form factor

Server-grade 128GB DDR4 RDIMM

This single 128GB DDR4 3200MHz module uses a 288-pin registered ECC design with CL22 latency and 1.2V operation. It is built for workstations and servers that require registered memory and cannot be used in standard desktop computers or mixed with unbuffered modules.

JEDEC-compliant registered ECC module

The module meets JEDEC standard specifications and is ROHS compliant, providing a warranty-safe upgrade path. Its 4Rx4 rank configuration and registered buffer help maintain signal integrity in multi-DIMM server configurations, while ECC support detects and corrects single-bit errors.

Verify registered ECC support before ordering

Confirm that your motherboard and CPU explicitly support DDR4 registered ECC RDIMMs and that the memory controller accepts 4Rx4 modules at this capacity. Systems limited to unbuffered non-ECC memory or lower rank counts will not recognise this module.

How it compares

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

Price $781.99
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 $6.11 per GB
Cheaper than about 63% of the 6,064 comparable items (median $7.25 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

Other versions of this model

5 more in the same range

Questions about this item

Does the 128GB 4Rx4 registered module need any periodic maintenance or component replacement after installation?

No — the module has no heat spreader, no moving parts and no user-serviceable components, so it runs for its service life without scheduled maintenance.

What limit appears first when the 3200MHz CL22 1.2V DIMM runs at full load continuously?

The CAS latency of 22 cycles at 3200MHz sets the timing ceiling; sustained throughput cannot exceed the JEDEC PC4-25600 bandwidth the module is rated for.

How much heat and power does the 288-pin 128GB stick produce during all-day operation?

It draws 1.2V with no onboard heat spreader, so thermal output stays at the level defined by the JEDEC DDR4 3200 registered specification.

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