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Two green DDR5 RDIMM sticks with gold contacts and black chips

OWC

OWC 32GB (2×16GB) DDR5 4800 CL40 ECC Registered RDIMM 1Rx8 1.1V 288-pin

SKU CH-Z2AP-VD9A9

32 GB DDR5-4800 ECC registered RDIMM kit for Lenovo ThinkSystem SR675 V3, SR850 V3, SR860 V3 and ST650 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
  • 4800 MT/s DDR5 speed matches PC5-38400 platform requirements
  • 32 GB kit (2 × 16 GB) scales memory capacity for supported ThinkSystem servers
  • 1 V operation reduces power draw per module
  • Validated for Lenovo SR675 V3, SR850 V3, SR860 V3 and ST650 V3

Server ECC DDR5 Kit

This 32GB kit contains two 16GB DDR5 4800 CL40 registered ECC RDIMMs built for Lenovo ThinkSystem SR675 V3, SR850 V3, SR860 V3 and ST650 V3 servers. Each module runs at 1.1V with a 1Rx8 organisation and fits 288-pin DDR5 slots. The memory is designed for workloads that require error correction and registered buffering.

Registered ECC Limits

Registered ECC DDR5 modules cannot be mixed with unbuffered or load-reduced DIMMs in the same system. The registered buffer adds one clock cycle of latency compared with unbuffered memory, which is normal for this class. Compatibility is restricted to the listed ThinkSystem models; standard desktop or consumer workstation platforms will not accept these DIMMs.

Straightforward Installation

Installation follows the server manufacturer’s DIMM population rules; seat each module until the retention clips lock. Common issues include mixing registered ECC with other ECC types, populating slots in the wrong order for the specific ThinkSystem model, or leaving a module partially seated, which causes boot failures.

Highlights

  • ECC registered design protects data integrity in critical workloads
  • 4800 MT/s DDR5 speed matches PC5-38400 platform requirements
  • 32 GB kit (2 × 16 GB) scales memory capacity for supported ThinkSystem servers
  • 1 V operation reduces power draw per module
  • Validated for Lenovo SR675 V3, SR850 V3, SR860 V3 and ST650 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 SR675 V3
Lenovo ThinkSystem SR850 V3
Lenovo ThinkSystem SR860 V3
Lenovo ThinkSystem ST650 V3

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Questions about this item

Is this 32 GB kit the right capacity for my ThinkSystem SR850 V3, or should I choose a different kit?

This kit provides 32 GB total as two 16 GB modules. Select it when your server requires that exact capacity and populated DIMM slots match the 1Rx8 registered ECC specification.

What does the DDR5 4800 CL40 rating deliver in a real Lenovo ThinkSystem SR675 V3?

The modules run at 4800 MT/s with CAS latency 40 at 1.1 V, giving the server JEDEC-standard DDR5 bandwidth and error-correcting registered operation for stable workloads.

Will the 288-pin PC5-38400 registered ECC interface work in my ST650 V3 without speed limits?

Yes. The 288-pin RDIMM uses the PC5-38400 (4800 MT/s) JEDEC interface; the server’s memory controller sets the final speed, but the modules are rated for the full 4800 MT/s.

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