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Four green DDR5 RDIMM modules in anti-static tray

OWC

OWC 128GB (4x32GB) DDR5 4800 CL40 2Rx8 1.1V ECC Registered RDIMM PowerEdge R760xa R860 R960 memory upgrade

SKU CH-9J6Q-2GRV4

A 128GB kit of four 32GB DDR5 4800 ECC registered RDIMMs for PowerEdge R760xa, R860 and R960 servers

  • Capacity128GB (4 x 32GB)
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 128GB (4 x 32GB)

Show 4 more configurations
  • 128 GB capacity across four 32 GB modules for high-density server workloads
  • DDR5 4800 MT/s PC5-38400 speed with CL40 latency for responsive data access
  • ECC registered 2Rx8 design detects and corrects errors to protect critical workloads
  • 1 V operation reduces power draw while maintaining enterprise reliability
  • Validated for Dell PowerEdge R760xa, R860 and R960 as direct replacement for part AC239378

Server Memory Kit

This OWC kit supplies 128GB of DDR5 ECC Registered RDIMM across four 32GB modules. It is built for Dell PowerEdge R760xa, R860 and R960 servers that require registered memory with error correction.

Thermals and Power

Each module runs at 1.1V and carries no heat spreader, relying on the server’s directed airflow for cooling. The registered buffer adds minimal latency while keeping signal integrity stable under sustained load.

Compatibility Constraints

The kit replaces Dell part numbers AC239378 and SNPW08W9C/32G but will not work in standard desktops or systems that use unbuffered or load-reduced DIMMs. Mixing with those memory types is not supported.

Highlights

  • 128 GB capacity across four 32 GB modules for high-density server workloads
  • DDR5 4800 MT/s PC5-38400 speed with CL40 latency for responsive data access
  • ECC registered 2Rx8 design detects and corrects errors to protect critical workloads
  • 1 V operation reduces power draw while maintaining enterprise reliability
  • Validated for Dell PowerEdge R760xa, R860 and R960 as direct replacement for part AC239378

Specifications

BrandOWC
Part Number4R8D52R8128S
Capacity128GB (4 x 32GB)
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx8
Heat SpreaderNo
Compatible SystemPowerEdge R760xa
PowerEdge R860
PowerEdge R960

Other versions of this model

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Questions about this item

How do I install the 288-pin DDR5 RDIMMs into the PowerEdge R760xa, and which step is commonly missed?

Power down the server, open the chassis, align each module's notch with the slot key, press firmly until the ejector tabs click, then verify in BIOS that all 128GB are recognised at 4800 MT/s; the step often missed is confirming the registered ECC mode is enabled.

What maintenance or replacement will the 1.1V ECC registered kit need over its service life?

No routine maintenance is required; if a module fails, replace the individual 32GB stick with an identical DDR5 4800 CL40 2Rx8 registered part to keep ECC integrity across all four channels.

What limit appears first when the 4x32GB kit runs sustained workloads on the R960?

The CAS latency of CL40 at 4800 MT/s sets the timing boundary; sustained throughput is capped by the JEDEC-standard 38400 MB/s per module before any thermal or voltage throttling occurs.

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