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Four green DDR5 RDIMM modules with gold contacts

OWC

OWC 256GB (4x64GB) DDR5 4800 CL40 ECC Registered RDIMM memory upgrade for PowerEdge R760xd2

SKU CH-BV14-F9CK0

Four 64 GB DDR5 4800 CL40 ECC registered RDIMMs totalling 256 GB for PowerEdge R760xd2 servers

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 256GB (4 x 64GB)

  • 256 GB total capacity from four 64 GB modules
  • DDR5 4800 speed rated at PC5-38400 CL40
  • ECC registered design detects and corrects data errors
  • 1 V operation reduces power draw per module
  • Qualified for Dell PowerEdge R760xd2 server compatibility

Server-grade DDR5 kit

This OWC kit provides 256GB of DDR5 4800 ECC registered memory in four 64GB modules. It is built for the Dell PowerEdge R760xd2 server platform. The modules use a 288-pin RDIMM form factor with 2Rx4 organisation and operate at 1.1V. This memory is intended for workstation, server and NAS environments that require error correction and registered buffering.

Verify registered ECC requirement

Before ordering, confirm your system requires DDR5 ECC registered RDIMMs and not unbuffered or load-reduced variants. The PowerEdge R760xd2 must support 2Rx4 modules at DDR5 4800 with CL40 timing. Mixing this kit with non-registered or non-ECC memory will prevent operation. Check the server documentation for approved population rules and maximum capacity per channel.

Four-module population

The kit fills four DIMM slots with matched 64GB modules, leaving remaining slots available for future expansion if the platform allows. Registered buffering reduces electrical load on the memory controller, helping stability in dense configurations. No heat spreaders are fitted, so ensure adequate chassis airflow over the modules. This upgrade replaces Dell part numbers AC239379 and SNPJ52K5C/64G.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $5,145.99
Pricier than about 80% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $20.10 per GB
Pricier than about 65% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D52R4256S
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsPowerEdge R760xd2

Other versions of this model

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Questions about this item

What comes in the OWC 256GB DDR5 4800 kit and is anything else needed for installation?

The kit contains four 64GB DDR5 4800 CL40 2Rx4 288-pin 1.1V ECC Registered RDIMM modules. No additional parts are required for installation into a compatible PowerEdge R760xd2 server.

Why choose the 256GB (4x64GB) CL40 version over other capacities or speeds?

This specific kit matches the Dell part numbers AC239379 and SNPJ52K5C/64G for the PowerEdge R760xd2, providing 256GB total capacity across four slots at the supported DDR5 4800 speed with CL40 latency.

What does the DDR5 4800 CL40 rating mean for real-world server performance?

The modules run at 4800 MT/s with a CAS latency of 40 cycles at 1.1V, delivering the JEDEC-standard bandwidth and error-correcting registered operation required for stable operation in the PowerEdge R760xd2.

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