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Two green 288-pin DDR4 RDIMM modules, no heat spreaders

OWC

OWC 64GB (2x32GB) DDR4 2933 ECC Registered RDIMM Memory Upgrade Kit

SKU CH-M726-HG0D8

64GB ECC registered DDR4 kit runs at 2933MHz CL21 for Cisco UCS M5 servers

  • Capacity64GB (2 x 32GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes

Capacity 64GB (2 x 32GB)

Show 2 more configurations
  • ECC registered design protects data integrity in server workloads
  • 64 GB kit (2 × 32 GB modules) expands Cisco UCS capacity
  • DDR4 2933 MHz CL21 speed matches platform specifications
  • 2 V operation reduces power draw in dense configurations
  • Backward compatible with 2133, 2400 and 2666 MHz systems

Server memory kit

This OWC kit provides 64GB of DDR4 ECC registered memory in two 32GB modules. It is built for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 servers that require registered DIMMs. The modules will not work in standard desktop computers or in systems that only accept unbuffered or load-reduced memory.

Registered DDR4 limits

The modules run at DDR4 2933 (PC4-23400) with CL21 latency at 1.2V. They are backward compatible with 2133, 2400 and 2666MHz bus speeds. Registered DIMMs cannot be mixed with unbuffered or load-reduced modules in the same system.

Pre-installation check

Verify that your Cisco UCS model is listed above and that the server currently uses registered ECC memory. Confirm the available 288-pin DIMM slots and the maximum supported capacity per slot. Ensure the platform does not require load-reduced or unbuffered memory types.

Highlights

  • ECC registered design protects data integrity in server workloads
  • 64 GB kit (2 × 32 GB modules) expands Cisco UCS capacity
  • DDR4 2933 MHz CL21 speed matches platform specifications
  • 2 V operation reduces power draw in dense configurations
  • Backward compatible with 2133, 2400 and 2666 MHz systems

Specifications

BrandOWC
Part Number2R9D42R4064P
Capacity64GB (2 x 32GB)
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Compatible SystemCisco UCS B200 M5
Cisco UCS B480 M5
Cisco UCS C220 M5
Cisco UCS C240 M5
Cisco UCS C480 M5

Other versions of this model

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Questions about this item

Should I buy the 64GB kit or look for a different capacity?

This kit provides 64GB total using two 32GB modules; it is sold only in this capacity for the listed Cisco UCS servers.

What does the 2933MHz rating actually deliver inside a Cisco UCS M5 server?

The modules run at DDR4 2933 (PC4-23400) with CL21 latency at 1.2V, and they will down-clock to 2666, 2400 or 2133MHz if the system requires it.

Is the 288-pin RDIMM interface compatible with standard desktop motherboards?

No; these are ECC Registered DDR4 RDIMMs for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 servers only.

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