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Eight green 288-pin DDR5 RDIMM modules in anti-static tray

OWC

OWC 1TB (8x128GB) DDR5 4800 CL40 4Rx4 ECC Registered RDIMM Kit

SKU CH-KNGP-BQ3NP

Eight 128 GB DDR5-4800 CL40 ECC registered RDIMMs add 1 TB of server-grade memory to compatible ThinkSystem SR635 V3, SR645 V3, SR650 V3, SR655 V3 and SR665 V3 systems

  • Capacity1TB (8 x 128GB)
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 1TB (8 x 128GB)

  • 1TB capacity across eight 128GB modules
  • DDR5 4800 speed for high-throughput workloads
  • ECC registered design protects data integrity
  • 1V operation lowers server power draw
  • Validated for ThinkSystem SR635 V3 SR645 V3 SR650 V3 SR655 V3 SR665 V3

Purpose-built server memory

This OWC kit delivers 1TB of DDR5 ECC registered memory across eight 128GB modules. It is engineered for Lenovo ThinkSystem SR635 V3, SR645 V3, SR650 V3, SR655 V3 and SR665 V3 servers. The modules will not work in standard desktop computers or with unbuffered and load-reduced memory types.

Thermals power and noise

Each module operates at 1.1V without a heat spreader, relying on the server chassis airflow for cooling. Registered buffering and ECC functionality add minimal overhead to the memory controller. Power draw scales with the 4800 MT/s data rate and 4Rx4 organisation under typical workloads.

Compliance and support

The kit meets JEDEC DDR5 standards and RoHS requirements for a warranty-safe upgrade. OWC provides a limited lifetime warranty with free technical support and an advanced replacement programme. These services reduce downtime when a module requires service.

Points forts

  • 1TB capacity across eight 128GB modules
  • DDR5 4800 speed for high-throughput workloads
  • ECC registered design protects data integrity
  • 1V operation lowers server power draw
  • Validated for ThinkSystem SR635 V3 SR645 V3 SR650 V3 SR655 V3 SR665 V3

Caractéristiques

BrandOWC
Part Number4R8D54R41TBK
Capacity1TB (8 x 128GB)
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
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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Questions sur cet article

How do I install the 288-pin DDR5 ECC RDIMM modules into the ThinkSystem SR650 V3, and which step is commonly missed?

Power down the server, open the chassis, and insert each 128 GB module into the correct DDR5 slot until the retention clips click. The step often missed is verifying the memory configuration in the BIOS after boot so the 4Rx4 registered DIMMs are recognised at 4800 MT/s.

What maintenance or replacement will the 1 TB kit need over its service life?

The modules have no heat spreaders and no moving parts, so no routine maintenance is required. Replacement is only necessary if a DIMM fails, which is covered by the manufacturer's limited lifetime warranty and advanced replacement programme.

What limit appears first when the 8 x 128 GB registered kit runs sustained workloads on the SR645 V3?

The memory controller's maximum supported speed of 4800 MT/s and the fixed CL40 latency are the primary limits; the 1.1 V operating voltage and registered design keep signal integrity stable, so thermal throttling is not the first bottleneck.

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