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Eight green DDR5 RDIMM modules in static bags

OWC

OWC 128GB (8x16GB) DDR5 5600 CL46 ECC Registered RDIMM Server RAM

SKU CH-VF3D-NSNG2

Eight 16 GB DDR5 modules at 5600 MT/s with ECC and registered buffering for server workloads

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • CAS latencyCL46
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank1Rx8

Capacity 128GB (8 x 16GB)

Show 4 more

Rank 1Rx8

  • 128 GB total capacity across eight 16 GB modules
  • DDR5 5600 speed with CL46 latency for responsive server workloads
  • ECC registered design detects and corrects data errors in critical systems
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • 1 V operation reduces power draw in dense configurations

Server-grade DDR5 RDIMM kit

This OWC kit supplies 128GB of DDR5 memory across eight 16GB registered DIMMs. It is built for workstations and servers that require ECC error correction and registered signal buffering. The modules run at 5600 MT/s with CL46 latency at 1.1V. Standard desktop boards cannot use this memory.

JEDEC-compliant 288-pin modules

Each stick follows the 288-pin DDR5 RDIMM form factor without a heat spreader. The 1Rx8 organisation and registered design place less electrical load on the memory controller, which helps stability in multi-DIMM configurations. JEDEC and RoHS compliance means the kit meets baseline industry specifications for server deployment.

Verify platform support before ordering

Confirm that your motherboard and CPU explicitly support DDR5 ECC registered RDIMMs and can populate eight slots. This memory will not work in consumer desktop platforms or in systems that only accept unbuffered or load-reduced DIMMs. Mixing with other memory types is not supported.

How it compares

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

Price $3,385.99
Pricier than about 90% 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 $26.45 per GB
Pricier than about 88% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number5R6D51R8128K
Total capacity128 GB (8 × 16 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
CAS latencyCL46
ECC supportYes
Buffer typeRegistered
Memory rank1Rx8
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.1 V

Other versions of this model

5 more in the same range

Questions about this item

What does the DDR5 5600 PC5-44800 rating mean for real-world bandwidth?

The DDR5 5600 PC5-44800 modules deliver a peak transfer rate of 44800 MT/s per channel, so actual throughput depends on the platform's memory controller and channel population.

What physical clearance do the 288-pin RDIMMs need inside a server chassis?

Each 288-pin DDR5 RDIMM uses the standard JEDEC height with no heat spreader, so they fit in typical 1U or 2U DIMM sockets as long as the CPU cooler or airflow baffle does not overhang the slot.

How are the eight 16 GB sticks installed for correct dual-channel operation, and what step is often missed?

Populate all eight slots following the motherboard's channel map — usually alternating channels per CPU — and ensure every module is fully seated until the retention clips click; the common miss is leaving one clip unlatched on a tightly packed board.

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