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Eight green DDR5 RDIMM sticks in a row, no heat spreaders, gold contacts visible

OWC

OWC 128GB (8x16GB) DDR5 5200 CL42 ECC Registered RDIMM server RAM

SKU CH-SNDA-PB25P

Eight 16 GB DDR5-5200 ECC registered RDIMMs totalling 128 GB for compatible servers and workstations

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR5 5200 (PC5 41600)
  • CAS latencyCL42
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank1Rx8

Capacity 128GB (8 x 16GB)

Show 4 more

Rank 1Rx8

  • 128 GB total capacity from eight 16 GB modules
  • DDR5 5200 speed with CL42 latency for server workloads
  • ECC registered design detects and corrects memory errors
  • 1 V operation reduces power draw in dense systems
  • JEDEC and RoHS compliant for warranty-safe upgrades

Server memory kit for workstations and NAS

This OWC kit provides 128 GB of DDR5 ECC registered memory across eight 16 GB modules. It is built for workstations, NAS systems and servers that require registered DIMMs. Standard desktop computers cannot use this memory, and it must not be mixed with unbuffered or load-reduced modules.

Registered ECC DDR5 at 5200 MT/s CL42

Each module runs at 5200 MT/s (PC5-41600) with a CAS latency of CL42 and operates at 1.1 V. The 1Rx8 organisation and 288-pin registered form factor ensure signal integrity for multi-channel server platforms. JEDEC compliance guarantees interoperability with qualified systems.

Low-voltage operation without heat spreaders

The 1.1 V rating keeps power draw modest for dense 8-module configurations. No heat spreaders are fitted, so airflow through the server chassis manages thermals. Registered buffering reduces electrical loading on the memory controller, contributing to stable operation under sustained workloads.

How it compares

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

Price $3,063.99
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 $23.94 per GB
Pricier than about 85% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number5R2D51R8128K
Total capacity128 GB (8 × 16 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 5200 (PC5 41600)
Memory
CAS latencyCL42
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 5200 MT/s rating actually deliver inside a server?

The kit runs at 5200 MT/s with CL42 timing, giving 41600 MB/s peak bandwidth per module when the platform supports DDR5-5200.

How does the DDR5 PC5-41600 standard limit real-world throughput?

PC5-41600 caps the data rate at 5200 MT/s; actual throughput depends on the memory controller and channel population.

Will these 288-pin RDIMMs fit in a standard server DIMM slot?

Yes, each module uses the 288-pin RDIMM form factor and 1.1 V operation required by compatible workstation and server boards.

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