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Eight green DDR4 RDIMM modules in anti-static tray

OWC

OWC 512GB (8x64GB) DDR4 3200 ECC Registered RDIMM Memory Upgrade Kit

SKU CH-ZRGS-M96P9

Eight 64 GB DDR4 3200 ECC registered RDIMMs totalling 512 GB for Cisco UCS B200 M6, C125 M5, C220 M6, C240 M6 and C245 M6 servers

  • Capacity512GB (8 x 64GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 3200 (PC4 25600)
  • CAS LatencyCL22
  • Voltage1.2V
  • ECCYes

Capacity 512GB (8 x 64GB)

Show 3 more configurations
  • 512 GB total capacity across eight 64 GB modules
  • DDR4 3200 speed with CL22 latency for server workloads
  • ECC registered design detects and corrects data errors
  • 2 V operation reduces power draw in dense configs
  • Validated for Cisco UCS B200 M6 C125 M5 C220 M6 C240 M6 C245 M6

Server ECC Memory Kit

This OWC kit supplies 512GB of DDR4 3200 registered ECC memory across eight 64GB modules. It is built for Cisco UCS B200 M6, C125 M5, C220 M6, C240 M6 and C245 M6 servers that require registered DIMMs. Workstations and desktops using unbuffered memory cannot use these modules.

Registered 288-Pin Design

Each module uses a 288-pin RDIMM form factor with 2Rx4 organisation and operates at 1.2V. The registered buffer reduces electrical load on the server memory controller, allowing the full eight-module population supported by the listed Cisco platforms. No heat spreaders are fitted, so airflow in the chassis handles cooling directly.

Thermals and Power

Standard JEDEC voltage keeps power draw predictable for dense server configurations. Registered modules typically run cooler than load-reduced alternatives at the same capacity. The CL22 latency at 3200 MT/s delivers stable throughput without increasing voltage or active cooling requirements.

Highlights

  • 512 GB total capacity across eight 64 GB modules
  • DDR4 3200 speed with CL22 latency for server workloads
  • ECC registered design detects and corrects data errors
  • 2 V operation reduces power draw in dense configs
  • Validated for Cisco UCS B200 M6 C125 M5 C220 M6 C240 M6 C245 M6

Specifications

BrandOWC
Part Number3R2D42R4512K
Capacity512GB (8 x 64GB)
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 3200 (PC4 25600)
CAS LatencyCL22
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Compatible SystemCisco UCS B200 M6
Cisco UCS C125 M5
Cisco UCS C220 M6
Cisco UCS C240 M6
Cisco UCS C245 M6

Other versions of this model

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Questions about this item

Does the PC4-25600 rating mean the kit runs at 3200 MT/s on every supported Cisco UCS server?

The kit is rated DDR4 3200 PC4-25600 CL22; actual speed depends on the server's memory controller and populated DIMM slots.

Will the 288-pin registered DIMMs fit the Cisco UCS B200 M6 and C240 M6 chassis without a riser?

The modules are standard 288-pin DDR4 RDIMMs; they install directly into the server's DIMM slots — no riser or adapter is required.

What is the correct population order for the eight 64 GB 2Rx4 modules in a Cisco UCS C220 M6?

Follow the Cisco UCS C220 M6 memory installation guide — populate the prescribed channels first and keep all eight modules identical in capacity, rank and speed.

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