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Four green DDR5 RDIMM modules with black chips and gold contacts

OWC

OWC 256GB (4x64GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-F8E1-T2ZEQ

256 GB kit of four 64 GB DDR5 4800 CL40 ECC registered RDIMMs for Dell PowerEdge R760xa, R860 and R960 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)

Show 4 more
  • ECC registered design protects data integrity in critical workloads
  • DDR5 4800 CL40 speed delivers high bandwidth for server applications
  • 256 GB kit (4 × 64 GB) expands memory capacity for virtualisation
  • 1 V operation reduces power draw per module
  • Compatible with PowerEdge R760xa, R860 and R960 systems

Server Memory Kit

This OWC kit provides 256 GB of DDR5 ECC registered memory across four 64 GB modules. It is designed for Dell PowerEdge R760xa, R860 and R960 servers that require registered DIMMs. The modules will not work in standard desktop computers or alongside unbuffered or load-reduced memory.

Capacity and Headroom

The 256 GB total gives ample headroom for virtualisation, large databases and memory-intensive workloads on supported PowerEdge platforms. Each 64 GB module runs at 4800 MT/s with CL40 latency, so performance scales with the server's memory controller limits. The kit cannot be mixed with unbuffered or load-reduced DIMMs, which restricts future expansion to identical registered modules.

Build and Connectors

Modules use the 288-pin DDR5 RDIMM form factor and operate at 1.1 V without heat spreaders. Registered buffering and on-die ECC help maintain data integrity in continuous server operation. The kit replaces Dell part numbers AC239379 and SNPJ52K5C/64G, confirming mechanical and electrical compatibility with the listed PowerEdge models.

How it compares

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

Price $5,367.99
Pricier than about 81% 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 $20.97 per GB
Pricier than about 66% 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 R760xa
PowerEdge R860
PowerEdge R960

Other versions of this model

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Questions about this item

Can I mix these 4800 CL40 ECC registered RDIMMs with existing unbuffered or load-reduced memory in my PowerEdge R860?

No, the manufacturer highlights state these ECC registered modules cannot be mixed with unbuffered or ECC load-reduced memory.

How can I verify the 256 GB kit is running at the rated 4800 MT/s CL40 after installation?

Check the system BIOS or a tool like CPU-Z to confirm the memory operates at DDR5 4800 (PC5-38400) with CL40 timings.

Does the box include only the four 64 GB RDIMMs or are any extra parts such as heat spreaders supplied?

The kit contains four 64 GB DDR5 4800 CL40 2Rx4 ECC registered RDIMMs; no heat spreaders or additional accessories are included.

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