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Eight green DDR4 RDIMM modules in anti-static tray

OWC

OWC 128GB (8x16GB) DDR4 3200 CL22 ECC Registered RDIMM Cisco UCS Kit

SKU CH-K5MF-29KPR

Eight 16 GB DDR4 3200 ECC registered RDIMMs totalling 128 GB for Cisco UCS B200 M6, C125 M5, C220 M6, C240 M6 and C245 M6 servers

  • Capacity128GB (8 x 16GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 3200 (PC4 25600)
  • CAS LatencyCL22
  • Voltage1.2V
  • ECCYes

Capacity 128GB (8 x 16GB)

Show 3 more configurations
  • 128 GB capacity with eight 16 GB modules
  • DDR4 3200 speed for high-throughput server workloads
  • ECC registered design detects and corrects data errors
  • 2 V operation reduces power draw in dense chassis
  • Validated for Cisco UCS B200 M6 C125 M5 C220 M6 C240 M6 C245 M6

Cisco UCS Server Memory Kit

This 128GB kit delivers eight 16GB DDR4 3200 registered ECC modules built for Cisco UCS B200 M6, C125 M5, C220 M6, C240 M6 and C245 M6 servers. It targets administrators upgrading those specific platforms with validated, JEDEC-compliant memory. The modules will not work in standard desktops or with unbuffered and load-reduced DIMMs.

128GB Capacity with CL22 Latency

Eight single-rank 1Rx4 modules run at 1.2V and CL22 timing to fill eight DIMM slots per compatible node. The kit handles multi-tenant virtualization, large in-memory databases and heavy container workloads until the server's maximum supported memory per socket is reached. It cannot be mixed with other memory types or speeds.

288-Pin RDIMM Form Factor for Qualified Chassis

Each module uses the standard 288-pin registered DIMM interface required by the listed Cisco UCS models, leaving no extra cabling or adapters to install. The kit frees procurement from sourcing individual Cisco part numbers UCSMRX16G1RW and UCSXMRX16G1RW while maintaining full ECC error correction. It is not compatible with consumer motherboards or non-qualified server platforms.

Highlights

  • 128 GB capacity with eight 16 GB modules
  • DDR4 3200 speed for high-throughput server workloads
  • ECC registered design detects and corrects data errors
  • 2 V operation reduces power draw in dense chassis
  • Validated for Cisco UCS B200 M6 C125 M5 C220 M6 C240 M6 C245 M6

Specifications

BrandOWC
Part Number3R2D41R4128K
Capacity128GB (8 x 16GB)
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 3200 (PC4 25600)
CAS LatencyCL22
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx4
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

Will the 288-pin DDR4 3200 ECC registered RDIMMs work in a Cisco UCS B200 M6 that already has 1Rx4 modules installed?

Yes, the kit uses the same 1Rx4 registered ECC specification so it can populate the remaining slots alongside existing 1Rx4 RDIMMs.

How can I confirm the 128GB kit is running at PC4-25600 CL22 after installation?

Check the BIOS memory information or use a tool like dmidecode to verify each DIMM reports 3200 MT/s, CL22 latency and registered ECC operation.

Does the package include only the eight 16GB RDIMMs or are any cables or brackets supplied?

The kit contains eight 16GB DDR4 3200 CL22 1Rx4 288-pin 1.2V ECC registered RDIMMs and nothing else.

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