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Eight green DDR5 RDIMM modules in a row

OWC

OWC 256GB (8×32GB) DDR5 4800 CL40 ECC Registered RDIMM Server RAM

SKU CH-57C0-6FARR

Eight-module kit delivers 256 GB of registered DDR5-4800 ECC memory at CL40 and 1.1 V for servers and workstations

  • Total capacity256 GB (8 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 256GB (8 x 32GB)

  • 256GB total capacity from eight 32GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered design detects and corrects data errors
  • 1V operation reduces power draw in dense configurations
  • JEDEC and RoHS compliant for warranty-safe upgrades

Server DDR5 ECC RDIMM Kit

This 256 GB kit comprises eight 32 GB DDR5 4800 registered DIMMs with ECC and a CL40 latency. It is built for workstations and servers that require registered memory and cannot accept unbuffered or load-reduced modules.

256 GB Registered Capacity

The eight-module set delivers 256 GB of ECC-protected capacity for multi-socket platforms that support DDR5 4800 registered DIMMs. Each module runs at 1.1 V with a 2Rx4 organisation, and the kit stops at the JEDEC-standard 4800 MT/s speed without higher-bin options.

288-Pin DDR5 Platform Fit

Modules use the standard 288-pin DDR5 RDIMM form factor and require a platform qualified for registered ECC memory at 4800 MT/s. They free unbuffered slots for other uses but cannot be mixed with unbuffered or load-reduced DIMMs in the same system.

How it compares

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

Price $6,157.99
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 $24.05 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 number4R8D52R4256K
Total capacity256 GB (8 × 32 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.1 V

Other versions of this model

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Questions about this item

Can this 256GB DDR5 4800 CL40 2Rx4 kit run alongside existing DDR5 4800 CL40 2Rx4 Registered modules in my server?

The kit uses JEDEC-standard DDR5 4800 PC5-38400 CL40 2Rx4 1.1V ECC Registered RDIMMs. Matching speed, latency, rank, voltage and registered type across all populated slots is required for stable operation.

How do I verify the 256GB kit is detected at 4800 MT/s with ECC active after installation?

Check BIOS or UEFI memory information for 256GB total capacity, 4800 MT/s operating speed and ECC status enabled. In the OS, use tools such as dmidecode on Linux or WMI on Windows to confirm speed, width and error-correction capability.

Does the 8-module 256GB kit include heat spreaders or any cables, and must I buy a CPU cooler separately?

The modules ship without heat spreaders. No cables or additional hardware are included. A compatible CPU cooler is a separate purchase if your chassis does not already provide adequate airflow over the DIMM slots.

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