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Green bare circuit board with black memory chips and gold edge connector

OWC

OWC 128GB DDR5 5600 PC5-44800 CL46 4Rx4 288-pin 1.1V ECC Registered RDIMM for Lenovo ThinkSystem SD530 V3

SKU CH-XXV9-CMM6J

A 128 GB DDR5 5600 ECC registered RDIMM built for the Lenovo ThinkSystem SD530 V3 server

  • Total capacity128 GB
  • Rated speedDDR5 5600 (PC5 44800)
  • CAS latency46
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank4Rx4

Capacity 128GB

  • 128 GB single module expands Lenovo ThinkSystem SD530 V3 capacity
  • DDR5 5600 PC5-44800 CL46 delivers JEDEC-standard server performance
  • ECC registered design corrects errors for reliable workloads
  • 1 V operation reduces power draw in dense configurations
  • 4Rx4 288-pin RDIMM form factor fits qualified server slots

Server-specific ECC RDIMM

This 128GB DDR5 registered DIMM is built for the Lenovo ThinkSystem SD530 V3. It targets administrators who need error-correcting memory in a single high-density module. The 288-pin form factor fits the server’s DDR5 slots directly. It will not work in standard desktop or unbuffered platforms.

128GB at DDR5-5600 CL46

The module runs at 5600 MT/s with a CAS latency of 46 and operates at 1.1V. One stick delivers 128GB of registered ECC capacity, suited to virtualization hosts and memory-bound databases. Workloads that exceed this density will require additional DIMM slots or higher-capacity parts not covered here.

JEDEC-compliant registered build

The 4Rx4 organization and registered buffer reduce electrical load on the memory controller. No heat spreader is fitted, so airflow in the chassis must handle thermal management. Mixing with unbuffered or load-reduced DIMMs is not supported, so deployment plans must keep the memory population uniform.

How it compares

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

Price $3,688.99
Pricier than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
CAS latency 46
Higher than about 90% of the 483 comparable items (median 22).
Price per GB $28.82 per GB
Pricier than about 81% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number5R6D54R4128G
Total capacity128 GB
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
CAS latency46
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo ThinkSystem SD530 V3

Other versions of this model

5 more in the same range

Questions about this item

Will this 128GB DDR5 5600 ECC registered RDIMM work alongside my existing DDR5 4800 modules in the ThinkSystem SD530 V3?

Mixing speeds is not recommended; the system will downclock all memory to the slowest installed module and may require identical rank configuration for stability.

How can I confirm the module is running at 5600 MT/s with CL46 latency after installation?

Check the BIOS memory information screen or run a tool such as dmidecode to verify the reported speed, CAS latency and registered ECC status.

Does the package include a heat spreader or any installation tools for the 288-pin RDIMM?

The module ships without a heat spreader and no tools are included; only the single 128GB DDR5 5600 ECC registered DIMM is in the box.

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