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Eight green DDR4 RDIMM modules with gold contacts and black chips

OWC

OWC 3R2D42R4128K 128GB (8x16GB) DDR4 3200MHz CL22 ECC Registered RDIMM 1.2V 288-pin Server RAM

SKU CH-ZFSG-N0NR7

Eight 16 GB DDR4 3200 MHz CL22 ECC registered RDIMMs at 1.2 V for 128 GB total server capacity

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latencyCL22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 128GB (8 x 16GB)

Show 4 more

Rank 2Rx4

  • 128GB total capacity with eight 16GB modules
  • ECC registered design detects and corrects data errors
  • DDR4 3200MHz speed rated at PC4-25600 bandwidth
  • CL22 CAS latency at 1.2V operating voltage
  • JEDEC compliant 288-pin RDIMM form factor

Server DDR4 ECC Registered Kit

This OWC kit delivers 128GB of DDR4 3200MHz memory across eight 16GB registered RDIMM modules. Each stick runs at CL22 latency with 1.2V voltage and 2Rx4 organisation. The 288-pin ECC registered design targets workstation and server platforms that require error correction and signal buffering. Standard desktop motherboards cannot use these modules.

Replacing unbuffered or lower-capacity DIMMs

The jump is worth it when your workload demands registered ECC memory and the board accepts 2Rx4 modules at 3200MHz. Mixing these with unbuffered DIMMs is not supported, so a full replacement is required. Systems limited to slower speeds or smaller maximum capacities will not benefit from the full kit specification.

Eight-module 128GB capacity for multi-socket servers

The configuration comfortably handles large virtualisation clusters, database caches and compute nodes that scale across all populated channels. Headroom runs out when the platform caps memory per channel below 16GB or restricts total slots to fewer than eight. Always verify the motherboard qualified-vendor list before installation.

How it compares

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

Price $905.99
Pricier than about 80% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB (8 × 16 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $7.08 per GB
Typical for this category: the median of 6,064 items is $7.25 per GB.

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Specifications

Product
Brand nameOWC
Part number3R2D42R4128K
Total capacity128 GB (8 × 16 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

What slot type does the 288-pin DDR4 RDIMM require on the server motherboard?

The modules use a standard 288-pin DDR4 RDIMM slot; the board must support registered ECC memory and cannot accept unbuffered DIMMs.

Which installation step is most often missed when populating all eight 16GB modules?

Servers usually require a specific population order across channels; skipping the manual's sequence will prevent the system from posting.

How can you tell when a module in the 128GB kit has developed a correctable ECC error?

The server's management log will record corrected-bit events for the affected DIMM, signalling that the module should be swapped during the next maintenance window.

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