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Green circuit board with black memory chips and gold edge connectors

OWC

OWC 16GB DDR5 4800 CL40 1Rx8 288-pin 1.1V ECC RDIMM 4R8D51R816GB memory upgrade

SKU CH-07T0-F3JZY

A 16 GB DDR5 ECC registered DIMM running at 4800 MT/s CL40 for Lenovo ThinkSystem SR635 V3, SR645 V3, SR650 V3, SR655 V3 and SR665 V3 servers

  • Capacity16GB
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 16GB

  • 16GB DDR5 4800 CL40 adds server-grade capacity to Lenovo ThinkSystem SR635 V3 SR645 V3 SR650 V3 SR655 V3 SR665 V3
  • ECC registered design detects and corrects single-bit errors for data integrity in critical workloads
  • 1V operation reduces power draw compared to earlier DDR generations
  • 288-pin RDIMM form factor installs directly into compatible server DIMM slots
  • Replaces Lenovo part numbers 4X71L72498 4X77A77029 4X77A81437 for validated compatibility

OWC 16GB DDR5 ECC RDIMM

This 16GB DDR5 module runs at 4800 MT/s with CL40 latency and 1.1V operation. It is an ECC Registered DIMM built for Lenovo ThinkSystem SR635 V3, SR645 V3, SR650 V3, SR655 V3 and SR665 V3 servers. The single-rank 1Rx8 design uses 288-pin form factor.

Server and workstation upgrades only

Suitable for administrators expanding memory in the listed ThinkSystem models or replacing Lenovo parts 4X71L72498, 4X77A77029 and 4X77A81437. Not for standard desktop PCs, laptops or consumer motherboards. Cannot be mixed with unbuffered or load-reduced ECC modules. Buyers needing non-ECC or unregistered memory should look elsewhere.

Verify slot type and population rules

Confirm the server accepts DDR5 288-pin RDIMMs and check the memory population guide for the specific ThinkSystem model. Ensure the system firmware supports 4800 MT/s registered ECC modules. Do not install alongside unbuffered or LRDIMM modules.

Privalumai

  • 16GB DDR5 4800 CL40 adds server-grade capacity to Lenovo ThinkSystem SR635 V3 SR645 V3 SR650 V3 SR655 V3 SR665 V3
  • ECC registered design detects and corrects single-bit errors for data integrity in critical workloads
  • 1V operation reduces power draw compared to earlier DDR generations
  • 288-pin RDIMM form factor installs directly into compatible server DIMM slots
  • Replaces Lenovo part numbers 4X71L72498 4X77A77029 4X77A81437 for validated compatibility

Specifikacijos

BrandOWC
Part Number4R8D51R816GB
Capacity16GB
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx8
Heat SpreaderNo
Compatible SystemLenovo ThinkSystem SR635 V3
Lenovo ThinkSystem SR645 V3
Lenovo ThinkSystem SR650 V3
Lenovo ThinkSystem SR655 V3
Lenovo ThinkSystem SR665 V3

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Does this 288-pin DDR5 ECC RDIMM require a Lenovo ThinkSystem server to operate?

Yes — it is validated for ThinkSystem SR635 V3, SR645 V3, SR650 V3, SR655 V3 and SR665 V3 and will not work in standard desktop platforms.

Can I add this 1Rx8 registered module to existing unbuffered or load-reduced DIMMs in the same server?

No — the module is ECC registered and must not be mixed with unbuffered or ECC load-reduced memory in the same system.

After installation, how can I confirm the 16 GB module is running at DDR5 4800 CL40 1.1 V?

Check the server BIOS or management console; it will report the module as 16 GB DDR5 4800 PC5-38400 CL40 1.1 V ECC registered.

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