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Eight green DDR5 RDIMM modules, bare circuit boards with black chips, no heat spreaders

OWC

OWC 256GB (8x32GB) DDR5 5600 CL46 ECC Registered RDIMM Server RAM

SKU CH-KRJT-3B9FG

Eight 32 GB DDR5 5600 CL46 ECC registered RDIMMs totalling 256 GB at 1.1 V for server workloads

  • Total capacity256 GB (8 × 32 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • CAS latencyCL46
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx8

Capacity 256GB (8 x 32GB)

Show 4 more

Rank 2Rx8

  • 256 GB total capacity from eight 32 GB modules
  • DDR5 5600 speed with CL46 latency for server workloads
  • ECC registered design detects and corrects data errors
  • 1 V operation reduces power draw in dense configurations
  • JEDEC and RoHS compliant for warranty-safe upgrades

ECC Registered Server Memory

This 256GB kit contains eight 32GB DDR5 5600 RDIMM modules built for select workstations and servers. It is not compatible with standard desktop computers and cannot be mixed with unbuffered or load-reduced ECC memory. The registered design targets multi-socket platforms that require registered DIMMs for stability. Buyers needing consumer DDR5 or non-ECC memory should look elsewhere.

JEDEC Standard 1.1V Operation

Each module runs at the JEDEC-defined 1.1V with CL46 latency at 5600 MT/s. The dual-rank 2Rx8 organisation and lack of heat spreaders mean thermal output follows the base specification without extra cooling overhead. Power draw scales with the eight-module population in fully loaded channels. Systems without registered ECC support will not POST with these DIMMs installed.

Eight-Module Matched Kit

The package delivers eight identical 32GB RDIMMs tested together for multi-channel operation. OWC validates every module in-house to meet JEDEC and RoHS compliance for warranty-safe upgrades. No additional software, drivers or accessories are included beyond the memory itself. Installers must populate all slots according to the platform's registered DIMM population rules.

How it compares

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

Price $6,250.99
Pricier than about 91% of the 6,523 comparable items (median $188.99).
Total capacity 256 GB (8 × 32 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $24.42 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 number5R6D52R8256K
Total capacity256 GB (8 × 32 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
CAS latencyCL46
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
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

How do I install the 8 DDR5 288-pin RDIMMs and what step is commonly missed?

Power off the server, open the chassis, align each module's notch with the slot key, press firmly until the retention clips lock, then repeat for all eight modules. The step often missed is verifying the memory mode in BIOS after boot to confirm the registered ECC configuration is active.

What maintenance or replacement will this 256GB DDR5 5600 kit need over its service life?

No scheduled maintenance is required for the modules themselves. Keep server air filters clean and ensure airflow over the bare PCBs since the kit has no heat spreaders. Replacement is only needed if a module fails, which is covered by the limited lifetime warranty with advanced replacement.

What limit appears first when the 2Rx8 registered DDR5 runs at 5600 MT/s under sustained load?

The 1.1V operating voltage and lack of heat spreaders mean thermal throttling or stability limits appear before bandwidth saturation. Sustained write-heavy workloads will hit the module's thermal envelope first, so adequate case airflow across all eight DIMMs is critical.

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