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Four green DDR5 ECC registered DIMMs with black chips, no heat spreaders

OWC

OWC 256GB (4x64GB) DDR5 5200 CL42 ECC RDIMM Server RAM

SKU CH-EYNH-94ZP8

ECC registered DDR5 kit supplying 256 GB across four 64 GB modules at 5200 MT/s with CL42 latency and 1.1 V operation

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 5200 (PC5 41600)
  • CAS latencyCL42
  • 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 servers
  • 256GB quad-channel kit scales memory capacity for heavy workloads
  • DDR5 5200 speed delivers high bandwidth for demanding applications
  • 1V operation reduces power draw in dense configurations
  • JEDEC and ROHS compliant for warranty-safe upgrades

Server Workstation Memory Kit

This OWC kit supplies 256 GB of DDR5 ECC registered memory across four 64 GB modules. It is built for workstations, NAS systems, servers and network switches that require registered DIMMs with error correction.

Verify Platform Compatibility

Your motherboard must support 288-pin DDR5 RDIMMs at 1.1 V and accept 2Rx4 registered modules. This memory will not work in standard desktop boards and cannot be mixed with unbuffered or load-reduced ECC DIMMs.

Build Integration Notes

The four-module kit populates dual-channel configurations in compatible servers. No heat spreaders are included, so ensure your chassis airflow meets the platform's thermal requirements for registered memory.

How it compares

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

Price $7,585.99
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 $29.63 per GB
Pricier than about 90% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number5R2D52R4256S
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 5200 (PC5 41600)
Memory
CAS latencyCL42
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 the kit contain everything needed for installation or are extra components required?

The kit includes four 64 GB DDR5 5200 CL42 2Rx4 288-pin 1.1 V ECC registered RDIMM modules; no additional memory parts are required for a full 256 GB upgrade.

How do I decide between the available capacity options for this server memory?

This kit provides 256 GB total in a matched set of four 64 GB modules; choose it when your workstation or server needs that exact capacity and your board supports quad-channel population.

What does the 5200 MT/s rating mean for actual system performance?

The modules run at DDR5 5200 (PC5-41600) with CL42 latency, delivering JEDEC-standard bandwidth and error correction for compatible workstations, NAS units and servers.

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