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Two green DDR5 RDIMM modules with gold contacts and black chips

OWC

OWC 32GB (2x16GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-FBY5-YX142

32 GB DDR5 4800 CL40 ECC registered dual-rank kit for Lenovo ThinkSystem SD650 V3, SD665 V3 and SR630 V3 servers

  • Capacity32GB (2 x 16GB)
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 32GB (2 x 16GB)

  • ECC registered design protects data integrity in critical workloads
  • DDR5 4800 CL40 speed delivers high bandwidth for server tasks
  • 32 GB kit (2 × 16 GB) expands memory capacity efficiently
  • 1 V operation reduces power draw in dense configurations
  • Validated for Lenovo ThinkSystem SD650 V3, SD650-I V3, SD665 V3, SD665-N V3 and SR630 V3

Server-grade DDR5 ECC upgrade

This OWC kit provides 32GB of DDR5 4800 memory as two 16GB registered DIMMs with ECC and a CL40 latency. It is built for Lenovo ThinkSystem SD650 V3, SD650-I V3, SD665 V3, SD665-N V3 and SR630 V3 servers. The modules operate at 1.1V and use a 288-pin form factor.

Registered ECC limits mixing

Registered ECC memory cannot be mixed with unbuffered or load-reduced modules in the same system. The DDR5 4800 standard sets the electrical and timing boundaries, so the kit will run at the platform's supported speed. Buyers who need consumer desktop memory or non-ECC modules cannot use this product.

Direct DIMM installation

Installation follows the server's standard DIMM-slot procedure; no heat spreader is present, so clearance is not increased. The most common issue is placing registered ECC DIMMs into a board that expects unbuffered memory, which prevents boot. Verify the ThinkSystem model and memory population rules before fitting.

Highlights

  • ECC registered design protects data integrity in critical workloads
  • DDR5 4800 CL40 speed delivers high bandwidth for server tasks
  • 32 GB kit (2 × 16 GB) expands memory capacity efficiently
  • 1 V operation reduces power draw in dense configurations
  • Validated for Lenovo ThinkSystem SD650 V3, SD650-I V3, SD665 V3, SD665-N V3 and SR630 V3

Specifications

BrandOWC
Part Number4R8D51R8032P
Capacity32GB (2 x 16GB)
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx8
Heat SpreaderNo
Compatible SystemLenovo ThinkSystem SD650 V3
Lenovo ThinkSystem SD650-I V3
Lenovo ThinkSystem SD665 V3
Lenovo ThinkSystem SD665-N V3
Lenovo ThinkSystem SR630 V3

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Questions about this item

Should I pick the 2 x 16 GB kit or look for a single 32 GB module?

This kit delivers 32 GB total using two 16 GB modules, letting you populate two slots for dual-channel operation on the supported ThinkSystem platforms.

What does the 4800 MHz rating actually give me inside a server?

The modules run at DDR5 4800 (PC5-38400) with CL40 latency at 1.1 V, providing the standard JEDEC data rate for the qualified ThinkSystem SD650 V3, SD650-I V3, SD665 V3, SD665-N V3 and SR630 V3 servers.

Will these 288-pin ECC registered DIMMs work in a regular desktop motherboard?

No — they are ECC registered RDIMMs designed for workstation and server platforms only and cannot be mixed with unbuffered or load-reduced memory.

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