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Single green 288-pin DDR4 LRDIMM module with black chips

OWC

OWC 256GB DDR4 2933 PC4-23400 CL21 8Rx4 288-pin 1.2V ECC LRDIMM memory upgrade

SKU CH-GMSQ-1B1YK

A single 256 GB DDR4 ECC load-reduced DIMM running at 2933 MHz CL21 for Supermicro H12SST-PS servers and workstations

Capacity 256GB

  • Massive 256 GB capacity handles heavy workloads
  • ECC load-reduced design protects data integrity
  • DDR4 2933 MHz speed accelerates server tasks
  • Runs at 1.2 V for efficient power use
  • Backward compatible with 2133, 2400 and 2666 MHz systems

Server memory upgrade

This 256GB DDR4 module is built for workstations and servers that require ECC load-reduced memory. It targets administrators upgrading a Supermicro H12SST-PS motherboard or similar platforms that accept 288-pin LRDIMMs. Standard desktop systems cannot use this module.

Compatibility constraints

The stick cannot be mixed with unbuffered or registered ECC DIMMs, so the entire memory array must use the same load-reduced technology. Backward compatibility with 2133MHz, 2400MHz and 2666MHz buses lets the module run in older DDR4 slots without separate parts.

Build and installation

A 288-pin LRDIMM form factor fits server DIMM slots directly, while 1.2V operation matches standard DDR4 voltage rails. JEDEC and RoHS compliance ensures the module meets industry electrical and environmental specifications for long-term deployment.

Highlights

  • Massive 256 GB capacity handles heavy workloads
  • ECC load-reduced design protects data integrity
  • DDR4 2933 MHz speed accelerates server tasks
  • Runs at 1.2 V for efficient power use
  • Backward compatible with 2133, 2400 and 2666 MHz systems

Specifications

No published specifications for this item yet.

Other versions of this model

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Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Will the 256GB DDR4 LRDIMM need any firmware updates or battery-backed maintenance over time?

No firmware or battery maintenance is required; the module is a solid-state JEDEC-standard DDR4 part that retains data only while powered.

What limit appears first when the 2933MHz CL21 module runs sustained workloads in a Supermicro H12SST-PS?

The memory controller’s maximum supported speed caps sustained throughput; the module will down-clock to 2666, 2400 or 2133 MHz if the platform cannot maintain 2933 MHz.

How much heat and power does a single 1.2V 8Rx4 LRDIMM produce during all-day server operation?

At 1.2 V the module draws low voltage typical for DDR4 LRDIMMs; the load-reduced buffer reduces electrical load on the bus, keeping thermals manageable in standard server airflow.

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