We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Four green DDR5 RDIMM sticks with gold contacts and black chips, no heat spreaders

OWC

OWC 256GB (4x64GB) DDR5 5600 CL46 ECC Registered RDIMM Server Memory

SKU CH-6AHR-KR10P

Four 64 GB DDR5 5600 CL46 ECC registered RDIMMs deliver 256 GB for workstations, NAS and servers

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • CAS latencyCL46
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 256GB (4 x 64GB)

Show 4 more

Rank 2Rx4

  • ECC registered design protects data integrity in critical workloads
  • 256GB total capacity across four 64GB modules scales server memory
  • DDR5 5600 speed with CL46 latency delivers high-throughput performance
  • 1V operating voltage reduces power draw per module
  • JEDEC and RoHS compliant for warranty-safe upgrades

Capacity and Form Factor

This OWC kit supplies 256 GB of DDR5 server memory as four 64 GB registered DIMMs. Each module uses a 288-pin RDIMM form factor with 2Rx4 organisation and runs at 1.1 V. The kit is built for workstations, NAS systems, servers and network switches that require ECC registered memory.

Who Should Buy and Who Should Not

This memory suits administrators upgrading compatible DDR5 platforms that specifically call for registered ECC DIMMs. It will not work in standard desktop PCs, consumer laptops or any system that accepts only unbuffered or load-reduced modules. Builders needing non-ECC memory or a different pin count must choose another product.

Deciding Specification

The modules operate at DDR5 5600 with a CAS latency of CL46 and conform to the PC5-44800 JEDEC standard. Verify that your motherboard or server documentation lists DDR5 5600 registered ECC RDIMM support before purchasing.

How it compares

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

Price $6,372.99
Pricier than about 91% of the 6,523 comparable items (median $188.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $24.89 per GB
Pricier than about 86% of the 6,064 comparable items (median $7.25 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number5R6D52R4256S
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
CAS latencyCL46
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
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

Does this kit fit a 288-pin DDR5 RDIMM slot?

Yes, each module is a 288-pin DDR5 ECC Registered DIMM designed for workstation and server slots.

How do I install the four 64 GB modules correctly?

Populate all four slots in the server's recommended channel order; the common mistake is mixing these registered DIMMs with unbuffered or load-reduced memory.

Will the modules need active cooling later?

No heat spreader is included, so ensure the chassis provides adequate airflow over the bare PCBs for sustained operation.

More in ECC Server RAM

Similar items