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Four green 288-pin DDR4 LRDIMM modules with black heat spreaders

OWC

OWC 1TB (4×256GB) DDR4 2933 PC4-23400 CL21 8Rx4 288-pin 1.2V ECC LRDIMM memory upgrade

SKU CH-9V3N-Q0MTP

A 1 TB DDR4 ECC load-reduced kit of four 256 GB modules at 2933 MHz CL21 for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 servers

Capacity 1TB (4 x 256GB)

  • 1 TB server memory capacity with four 256 GB modules
  • ECC load-reduced DDR4 corrects errors for reliable server operation
  • 2933 MHz CL21 speed with backward compatibility to 2133, 2400, 2666 MHz
  • Low 1.2 V voltage reduces power draw in dense configurations
  • 288-pin LRDIMM form factor fits Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5, C480 M5

Server Memory Kit

This 1 TB kit contains four 256 GB DDR4 2933 PC4-23400 CL21 ECC load-reduced DIMMs. It is built for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 servers that require registered ECC memory. The modules operate at 1.2 V and use the 288-pin LRDIMM form factor. Workstations and standard desktops cannot use this memory type.

Thermals and Power

Each module runs at the JEDEC-standard 1.2 V, keeping power draw low for high-density server configurations. Load-reduced buffering reduces electrical load on the memory controller, which helps maintain stable thermals in multi-DIMM populated chassis. The kit is backward compatible with 2133, 2400 and 2666 MHz bus speeds, allowing operation at lower frequencies when the platform requires it.

Upgrade Path

This kit replaces Cisco part UCSML256G8RTH and expands capacity in compatible UCS M5 platforms. The jump is worth it when virtualisation density, in-memory databases or large dataset analytics demand more than the factory-fitted memory provides. It is not for systems that accept only unbuffered or standard registered ECC DIMMs, nor for builders needing consumer desktop memory.

Highlights

  • 1 TB server memory capacity with four 256 GB modules
  • ECC load-reduced DDR4 corrects errors for reliable server operation
  • 2933 MHz CL21 speed with backward compatibility to 2133, 2400, 2666 MHz
  • Low 1.2 V voltage reduces power draw in dense configurations
  • 288-pin LRDIMM form factor fits Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5, C480 M5

Specifications

No published specifications for this item yet.

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Questions about this item

How do I install the 288-pin ECC Load Reduced DIMMs in a Cisco UCS B200 M5, and what step is often missed?

Power down the server, open the chassis, align the notch on each 288-pin module with the slot key, press firmly until both latches click, then enable ECC Load Reduced mode in the BIOS so the 8Rx4 organisation is recognised.

What maintenance or replacement will the 1.2 V DDR4 2933 kit need over its service life?

The modules have no moving parts and require no scheduled maintenance; replacement is only needed if a DIMM fails POST or the server logs correctable ECC errors that exceed the platform threshold.

What limit appears first when the 256 GB 8Rx4 LRDIMMs run sustained workloads at 2933 MT/s?

The memory controller’s maximum supported rank count per channel is reached before thermal or bandwidth limits, capping total capacity per CPU socket.

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