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Four green DDR5 ECC RDIMM modules in anti-static tray

OWC

OWC 512GB (4×128GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-8G9A-T1MG4

A 512 GB DDR5-4800 ECC registered RDIMM kit of four 128 GB modules for Dell PowerEdge R6625, R760, R7615 and R7625 servers

  • Capacity512GB (4 x 128GB)
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 512GB (4 x 128GB)

  • 512 GB total capacity from four 128 GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered design protects data integrity in critical systems
  • 1 V operation reduces power draw in dense configurations
  • Validated for Dell PowerEdge R6625, R760, R7615 and R7625

Server-grade DDR5 ECC kit

This OWC kit delivers 512GB of DDR5 4800 memory across four 128GB registered DIMMs. Each module operates at CL40 latency and 1.1V, conforming to JEDEC PC5-38400 specifications. The 4Rx4 organisation and ECC registration target Dell PowerEdge R6625, R760, R7615 and R7625 servers.

Replaces unbuffered or mixed memory

The modules cannot be mixed with unbuffered or load-reduced DIMMs, so the upgrade only makes sense when the platform already requires registered ECC. The jump is worth it when the existing configuration limits capacity or forces slower ranks that restrict total addressable memory.

Direct DIMM installation

Installation follows the standard 288-pin DDR5 DIMM procedure for the listed PowerEdge chassis; no heat spreaders are present to interfere with tight slot spacing. The most common error is combining these registered modules with incompatible memory types, which prevents the system from posting.

Highlights

  • 512 GB total capacity from four 128 GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered design protects data integrity in critical systems
  • 1 V operation reduces power draw in dense configurations
  • Validated for Dell PowerEdge R6625, R760, R7615 and R7625

Specifications

BrandOWC
Part Number4R8D54R4512S
Capacity512GB (4 x 128GB)
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
Heat SpreaderNo
Compatible SystemDell PowerEdge R6625
Dell PowerEdge R760
Dell PowerEdge R7615
Dell PowerEdge R7625

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Questions about this item

Will the 288-pin DDR5 RDIMMs fit the Dell PowerEdge R760 memory slots?

Yes, the 288-pin DDR5 RDIMM form factor matches the DIMM slots in the Dell PowerEdge R760, R7615, R7625 and R6625.

What is the correct installation sequence for the four 128 GB modules?

Populate the slots following the server's memory population guide, typically one module per channel first, and ensure each module clicks fully into the 288-pin socket.

When should the ECC RDIMM kit be replaced?

Replace modules if the system logs uncorrectable ECC errors, fails memory diagnostics, or when a firmware update requires a different rank or speed configuration.

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