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Green rectangular circuit board with gold edge connectors and black memory chips

OWC

OWC 64GB DDR4 2933MHz ECC Registered RDIMM memory upgrade for Lenovo ThinkSystem ST550

SKU CH-1KB1-Q496P

64GB DDR4 2933MHz ECC Registered RDIMM module validated for Lenovo ThinkSystem ST550 servers

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

Capacity 64GB

  • 64GB capacity expands server memory for demanding workloads
  • DDR4 2933MHz speed delivers high bandwidth for data-intensive tasks
  • ECC registered design corrects errors to protect critical data integrity
  • 2V operation reduces power consumption in dense server environments
  • Backward compatible with 2133MHz 2400MHz 2666MHz systems for flexible deployment

64GB DDR4 ECC RDIMM for ThinkSystem ST550

This 64GB DDR4 2933MHz module is built for the Lenovo ThinkSystem ST550 server. It uses registered ECC technology required by Xeon SP Gen 2 platforms. Standard desktop systems cannot accept this memory type.

Capacity and registered headroom

A single 64GB stick adds substantial capacity for virtualisation or large datasets. Registered buffering reduces electrical load on the memory controller, allowing more modules per channel. Mixing with unbuffered DIMMs is not supported and will prevent boot.

288-pin DDR4 slot requirements

The module fits a standard 288-pin DDR4 slot and runs at 1.2V. Backward compatibility covers 2133, 2400 and 2666MHz bus speeds. No heat spreader is fitted, so airflow across the DIMM row must be maintained by the server chassis fans.

Highlights

  • 64GB capacity expands server memory for demanding workloads
  • DDR4 2933MHz speed delivers high bandwidth for data-intensive tasks
  • ECC registered design corrects errors to protect critical data integrity
  • 2V operation reduces power consumption in dense server environments
  • Backward compatible with 2133MHz 2400MHz 2666MHz systems for flexible deployment

Specifications

BrandOWC
Part Number2R9D42R464GB
Capacity64GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Compatible SystemLenovo ThinkSystem (Xeon SP Gen 2) ST550

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Questions about this item

Will the 2933MHz RDIMM run with 2133MHz ECC registered modules already in my ST550?

The module is backward compatible with 2133MHz, 2400MHz and 2666MHz registered ECC DIMMs; the system will clock all sticks to the lowest common speed.

How can I confirm the 64GB ECC registered DIMM is detected and error-correcting after installation?

Check the BIOS memory information or OS tools such as dmidecode; they should report 64GB, ECC type Registered and a speed of 2933MHz or the down-clocked value.

Does the single 288-pin RDIMM ship with a heat spreader or any extra brackets?

The module has no heat spreader and no additional brackets are included; only the DIMM itself is in the box.

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