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Four green 288-pin DDR5 RDIMM modules in static bags

OWC

OWC 512GB (4×128GB) DDR5 4800 CL40 4Rx4 ECC Registered RDIMM memory upgrade

SKU CH-07X9-D8CA3

Adds 512GB of DDR5-4800 ECC registered server memory for Lenovo ThinkSystem SR675 V3, SR850 V3, SR860 V3 and ST650 V3

  • Capacity512GB (4 x 128GB)
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 512GB (4 x 128GB)

  • 512 GB total capacity from four 128 GB modules
  • DDR5 4800 CL40 speed with 1.1 V operation
  • ECC registered design corrects errors in server workloads
  • 4Rx4 quad-rank layout maximises density per slot
  • Validated for ThinkSystem SR675 V3, SR850 V3, SR860 V3, ST650 V3

Server memory kit

This OWC kit provides 512GB of DDR5 ECC registered memory across four 128GB modules. It is built for Lenovo ThinkSystem SR675 V3, SR850 V3, SR860 V3 and ST650 V3 servers that require registered DIMMs with error correction.

Compatibility check

Verify that your server model appears in the supported list and that the memory slots accept 288-pin registered RDIMMs. The modules run at 1.1V with CL40 latency and a 4Rx4 organisation; they cannot be mixed with unbuffered or load-reduced ECC memory.

Capacity upgrade

The kit replaces smaller DDR5 registered kits to reach 512GB in a four-module configuration. The jump is worthwhile when workloads such as virtualisation or large databases need the extra capacity and the server’s memory controller supports the 4Rx4 rank structure.

Highlights

  • 512 GB total capacity from four 128 GB modules
  • DDR5 4800 CL40 speed with 1.1 V operation
  • ECC registered design corrects errors in server workloads
  • 4Rx4 quad-rank layout maximises density per slot
  • Validated for ThinkSystem SR675 V3, SR850 V3, SR860 V3, ST650 V3

Specifications

BrandOWC
Part Number4R8D54R4512S
Capacity512GB (4 x 128GB)
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
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

Does the 512GB kit ship as four separate 128GB modules or do I need to buy additional DIMMs?

The kit contains four 128GB DDR5 4800 CL40 4Rx4 ECC Registered RDIMMs, giving 512GB total with no extra modules required.

How do I decide between this 512GB 4Rx4 kit and a lower-capacity option for my ThinkSystem SR850 V3?

Choose this 512GB kit when the workload needs maximum registered ECC capacity across four slots; smaller kits use fewer 128GB modules and provide less total memory.

What does the DDR5 4800 CL40 rating mean once the modules are installed in a ThinkSystem SR675 V3?

The modules run at 4800 MT/s with a CAS latency of 40 cycles at 1.1V, delivering JEDEC-standard registered ECC performance for the supported ThinkSystem platforms.

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