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Green circuit board with gold edge connectors and black memory chips, no heat spreader

OWC

OWC 128GB DDR5 4800 CL40 4Rx4 ECC RDIMM memory upgrade for ThinkSystem SR950 V3

SKU CH-G8T1-5VJ9E

128GB DDR5 4800 ECC RDIMM module adds registered server memory to ThinkSystem SR950 V3

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

Capacity 128GB

  • 128 GB capacity expands server memory headroom
  • DDR5 4800 speed with CL40 latency delivers rated throughput
  • ECC registered design protects data integrity in critical workloads
  • 1 V operation reduces power draw per module
  • Single 4Rx4 288-pin RDIMM simplifies ThinkSystem SR950 V3 upgrades

Server memory upgrade

This 128GB DDR5 4800 ECC Registered RDIMM is built specifically for the Lenovo ThinkSystem SR950 V3. It targets IT teams expanding capacity in that exact platform where registered error-correcting memory is required.

Thermals and power

Operating at 1.1V, the module runs at standard DDR5 server voltage without a heat spreader. Registered buffering and ECC circuitry add minimal overhead, so thermal output and power draw stay within normal limits for dense SR950 V3 configurations.

Compatibility gate

The single deciding specification is the 4Rx4 registered ECC organisation; this module will not work in desktop boards, unbuffered slots or load-reduced memory channels. Buyers needing standard desktop DDR5 or non-ECC memory must choose a different product.

Highlights

  • 128 GB capacity expands server memory headroom
  • DDR5 4800 speed with CL40 latency delivers rated throughput
  • ECC registered design protects data integrity in critical workloads
  • 1 V operation reduces power draw per module
  • Single 4Rx4 288-pin RDIMM simplifies ThinkSystem SR950 V3 upgrades

Specifications

BrandOWC
Part Number4R8D54R4128G
Capacity128GB
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
Heat SpreaderNo
Compatible SystemLenovo ThinkSystem SR950 V3

Other versions of this model

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Questions about this item

How do I install the 128GB DDR5 4800 RDIMM into the ThinkSystem SR950 V3, and which step is often missed?

Power down the server, open the chassis, and insert the 288-pin module into the correct DDR5 slot until the ejector clips lock; the step often missed is confirming the slot supports 4Rx4 registered ECC and that no unbuffered or load-reduced DIMMs are mixed in the same channel.

What maintenance or replacement will this 128GB ECC registered module need later?

No routine maintenance is required; if a correctable error count rises or the module fails, replace it with an identical 128GB DDR5 4800 CL40 4Rx4 1.1V ECC RDIMM to preserve compatibility with the SR950 V3 memory configuration.

What limit appears first on this 128GB DDR5 4800 CL40 4Rx4 RDIMM under sustained server workloads?

The CAS latency of CL40 at 4800 MT/s sets the primary timing boundary; sustained heavy access will hit this latency floor before bandwidth or voltage limits become the bottleneck.

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