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Two green DDR5 RDIMM modules with gold contacts and black chips

OWC

OWC 128GB (2x64GB) DDR5 4800 CL40 ECC Registered RDIMM memory upgrade PowerEdge R760xa R860 R960

SKU CH-BMW8-6BKM3

128 GB dual-rank DDR5-4800 ECC registered RDIMM kit for Dell PowerEdge R760xa, R860 and R960 servers

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 128GB (2 x 64GB)

Show 4 more
  • 128 GB total capacity from two 64 GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered design protects data integrity in critical tasks
  • 1 V operation reduces power draw in dense configurations
  • Validated for PowerEdge R760xa, R860 and R960 systems

Server memory kit

This 128GB kit contains two 64GB DDR5 ECC registered RDIMMs built for Dell PowerEdge R760xa, R860 and R960 servers. It targets administrators who need to expand capacity in those specific platforms without mixing memory types.

Registered ECC requirement

The modules are 288-pin DDR5 4800 CL40 parts that operate at 1.1V and use a 2Rx4 organisation. They will not work in standard desktop boards and cannot be mixed with unbuffered or load-reduced DIMMs.

Capacity headroom

The 128GB total suits workloads that benefit from large memory pools such as virtualisation or in-memory databases. Systems needing more than 128GB per channel or non-registered memory must choose a different configuration.

How it compares

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

Price $2,605.99
Pricier than about 71% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $20.36 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 number4R8D52R4128P
Total capacity128 GB (2 × 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

What does the 4800 speed mean when the modules are installed in a PowerEdge R760xa?

DDR5 4800 (PC5-38400) is the rated data rate; the server's memory controller will run the kit at up to 4800 MT/s, and the CL40 timing applies at that speed.

How does the PC5-38400 rating and CL40 timing limit real-world throughput?

PC5-38400 specifies the peak transfer rate class, and CL40 sets the CAS latency at 4800 MT/s; actual bandwidth depends on the server's memory configuration and workload.

What physical slot and clearance do the 288-pin RDIMMs need in a PowerEdge R860?

The kit uses 288-pin DDR5 RDIMM form factor with no heat spreader; it fits standard DDR5 RDIMM slots and requires no extra clearance beyond the module height.

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