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
Two green DDR5 server DIMMs, 288-pin, no heat spreaders

OWC

OWC 256GB (2x128GB) DDR5 5600 CL46 4Rx4 ECC Registered RDIMM server RAM

SKU CH-YCAA-K2BRZ

A 256 GB dual-channel DDR5 kit with ECC registered RDIMMs running at 5600 MT/s and CL46 latency

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • CAS latencyCL46
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank4Rx4

Capacity 256GB (2 x 128GB)

Show 4 more

Rank 4Rx4

  • ECC registered design protects data integrity in critical workloads
  • 256 GB total capacity across two 128 GB modules supports large datasets
  • DDR5 5600 speed with CL46 latency delivers high throughput
  • 1 V operation reduces power draw for dense server configs
  • JEDEC and RoHS compliant for broad workstation and server compatibility

Server DDR5 ECC Registered Kit

This 256GB dual-channel kit contains two 128GB DDR5 5600 CL46 modules built to the JEDEC PC5-44800 standard. They are 288-pin ECC Registered RDIMMs designed for select workstations, servers, NAS systems and network switches. The kit will not fit standard desktop computers. Each module runs at 1.1V and uses a 4Rx4 organisation.

ECC Registered Architecture

The registered buffer and on-die ECC provide error correction and signal integrity required by multi-socket server platforms. Mixing these modules with unbuffered or load-reduced DIMMs is not supported. The dual-channel kit simplifies population of matched pairs in compatible memory controllers. No heat spreader is included, so airflow must meet the platform specification.

256GB Capacity Headroom

The 256GB total capacity supports large in-memory databases, virtualisation clusters and high-thread-count compute workloads. Workloads that exceed this limit will require additional memory slots or higher-density modules not included in this kit. Systems limited to lower maximum memory per channel cannot use the full 128GB per module.

How it compares

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

Price $7,284.99
Pricier than about 91% of the 6,523 comparable items (median $188.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $28.46 per GB
Pricier than about 90% 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 number5R6D54R4256P
Total capacity256 GB (2 × 128 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
CAS latencyCL46
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
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

Will the 4Rx4 registered DIMMs need any firmware updates or periodic reseating?

No firmware updates or reseating are required for the 4Rx4 registered modules; they operate as standard JEDEC DDR5 parts.

What limits sustained throughput on this 5600 CL46 kit?

The CL46 latency at DDR5 5600 sets the primary ceiling for sustained bandwidth.

How much heat and power do two 128 GB modules draw at 1.1 V all day?

Each module runs at 1.1 V without a heat spreader; total power scales with the 256 GB capacity under load.

More in ECC Server RAM

Similar items