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Two green DDR5 ECC registered DIMMs in static bags

OWC

OWC 64GB (2x32GB) DDR5 4800 CL40 ECC RDIMM 1Rx4 1.1V ThinkSystem SR950 V3

SKU CH-K80K-DYJBE

64 GB DDR5-4800 ECC registered RDIMM kit (2 × 32 GB, CL40, 1.1 V) validated for Lenovo ThinkSystem SR950 V3 servers

  • Capacity64GB (2 x 32GB)
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 64GB (2 x 32GB)

  • ECC registered design protects data integrity in server workloads
  • DDR5 4800 speed with CL40 latency supports high-throughput applications
  • 1 V operation reduces power draw per module
  • 64 GB kit (2 × 32 GB) expands ThinkSystem SR950 V3 memory capacity
  • JEDEC-standard compliant build ensures warranty-safe upgrade

Compatible upgrade for ThinkSystem SR950 V3

This 64GB kit contains two 32GB DDR5 4800 ECC registered DIMMs built to JEDEC standard. It is designed for the Lenovo ThinkSystem SR950 V3 server and will not work in standard desktop computers or with unbuffered or load-reduced memory.

Capacity and registered ECC headroom

Two 32GB modules deliver 64GB of registered ECC memory at 4800MT/s with CL40 latency and 1.1V operation. The registered design and ECC support provide the stability required for server workloads, while the 1Rx4 organisation fits the platform's memory architecture.

288-pin DDR5 RDIMM form factor

The kit uses the 288-pin DDR5 RDIMM form factor required by the ThinkSystem SR950 V3. Mixing with unbuffered or load-reduced DIMMs is not supported, so the correct module type is the deciding factor for compatibility.

Highlights

  • ECC registered design protects data integrity in server workloads
  • DDR5 4800 speed with CL40 latency supports high-throughput applications
  • 1 V operation reduces power draw per module
  • 64 GB kit (2 × 32 GB) expands ThinkSystem SR950 V3 memory capacity
  • JEDEC-standard compliant build ensures warranty-safe upgrade

Specifications

BrandOWC
Part Number4R8D51R4064P
Capacity64GB (2 x 32GB)
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx4
Heat SpreaderNo
Compatible SystemLenovo ThinkSystem SR950 V3

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Questions about this item

Will these DDR5 4800 CL40 1.1V ECC RDIMMs run alongside my existing DDR5 4800 ECC RDIMMs in the ThinkSystem SR950 V3?

Yes — they share the same DDR5 4800 PC5-38400 CL40 1.1V ECC registered specification, so they will operate together in the SR950 V3 without mixing registered and unbuffered or load-reduced types.

How can I confirm the kit is running at 4800 MT/s with ECC active after installation?

Check the system BIOS or UEFI memory information screen; it should report 4800 MT/s speed, CL40 latency, 1.1 V voltage and ECC registered status for each 32 GB module.

What comes in the 64 GB upgrade kit and do I need any extra parts?

The kit contains two 32 GB 288-pin DDR5 ECC RDIMMs (part number 4R8D51R4064P); no additional components are required for installation in a compatible ThinkSystem SR950 V3 server.

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