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Two green 288-pin DDR5 RDIMM modules, no heat spreader

OWC

OWC 128GB (2x64GB) DDR5 4800 CL40 2Rx4 ECC Registered RDIMM for ThinkSystem SR950 V3 memory upgrade

SKU CH-KFE6-E1XM2

Dual 64 GB DDR5-4800 CL40 ECC registered RDIMMs add 128 GB to a Lenovo ThinkSystem SR950 V3 server

  • Capacity128GB (2 x 64GB)
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 128GB (2 x 64GB)

  • 128 GB total capacity from two 64 GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered design detects and corrects data errors
  • 1 V operation reduces power draw in dense configurations
  • Validated for Lenovo ThinkSystem SR950 V3 compatibility

Server ECC RDIMM Kit

This OWC kit provides 128 GB of DDR5 memory in two 64 GB registered DIMMs. It is built for the Lenovo ThinkSystem SR950 V3 and will not work in standard desktop computers.

Build Integration

Each module uses a 288-pin DDR5 interface at 1.1 V with CL40 timing and a 2Rx4 organisation. The registered design requires a platform that supports ECC registered memory and cannot be mixed with unbuffered or load-reduced modules.

Target Buyer

Suitable for administrators expanding a ThinkSystem SR950 V3 or deploying new server builds that demand ECC registered DDR5. Not for desktop users, workstations needing unbuffered DIMMs, or systems limited to lower-density modules.

Highlights

  • 128 GB total capacity from two 64 GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered design detects and corrects data errors
  • 1 V operation reduces power draw in dense configurations
  • Validated for Lenovo ThinkSystem SR950 V3 compatibility

Specifications

BrandOWC
Part Number4R8D52R4128P
Capacity128GB (2 x 64GB)
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Compatible SystemLenovo ThinkSystem SR950 V3

Other versions of this model

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Questions about this item

How many 64 GB modules are included in the 128 GB kit?

The kit contains two 64 GB DDR5 4800 CL40 registered ECC RDIMMs, giving 128 GB total capacity.

What is the operating voltage of these DDR5 4800 modules?

They run at 1.1 V, the standard JEDEC voltage for DDR5 4800 registered ECC memory.

Does the ThinkSystem SR950 V3 require registered ECC RDIMMs for this upgrade?

Yes, the SR950 V3 uses 288-pin DDR5 registered ECC RDIMMs; unbuffered or load-reduced modules are not compatible.

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