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Four green 288-pin DDR4 LRDIMM modules in static bags

OWC

OWC 512GB (4x128GB) DDR4 2933 CL21 4Rx4 288-pin 1.2V ECC Load Reduced LRDIMM memory upgrade

SKU CH-7SYT-HR40B

512 GB of DDR4 2933 ECC load-reduced memory in four 128 GB modules for compatible Supermicro X11 server boards

  • Capacity512GB (4 x 128GB)
  • Type288-Pin DDR4 ECC LRDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes

Capacity 512GB (4 x 128GB)

Struck-through versions exist but are not stocked here.

  • 512 GB total capacity across four 128 GB modules
  • DDR4 2933 MHz CL21 speed for responsive server workloads
  • ECC load-reduced design protects data integrity in workstations
  • 2 V operation reduces power draw in dense configurations
  • Compatible with Supermicro X11DPD-L, X11DPD-M25, X11DPFF-SNR, X11QPL, X11SPA-T

Server-grade ECC LRDIMM kit

This OWC kit delivers 512GB of DDR4 ECC Load Reduced memory in four 128GB modules. It is built for Supermicro X11 server and workstation motherboards that require registered LRDIMM technology. The modules operate at 1.2V and carry JEDEC and RoHS compliance. Standard desktop systems cannot use this memory type.

512GB capacity with four ranks

Each 128GB module uses a 4Rx4 organisation, giving dense capacity per slot for virtualisation, large databases or in-memory analytics. The CL21 latency at 2933 MT/s provides predictable throughput for sustained workloads. Systems limited to lower memory speeds will still accept the kit through backward compatibility. Builders needing unbuffered or standard registered DIMMs must choose a different product.

DDR4 2933 interface limits

The PC4-23400 rating sets the peak transfer rate for this generation. The kit also runs at 2133, 2400 and 2666 MT/s when the platform requires it. Mixing these LRDIMMs with unbuffered or standard registered modules is not supported. Buyers whose boards lack LRDIMM support cannot use this upgrade.

Highlights

  • 512 GB total capacity across four 128 GB modules
  • DDR4 2933 MHz CL21 speed for responsive server workloads
  • ECC load-reduced design protects data integrity in workstations
  • 2 V operation reduces power draw in dense configurations
  • Compatible with Supermicro X11DPD-L, X11DPD-M25, X11DPFF-SNR, X11QPL, X11SPA-T

Specifications

BrandOWC
Part Number2L9D44R4512S
Capacity512GB (4 x 128GB)
Type288-Pin DDR4 ECC LRDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredLoad Reduced
Rank4Rx4
Heat SpreaderNo
Compatible SystemSupermicro Motherboard X11DPD-L
Supermicro Motherboard X11DPD-M25
Supermicro Motherboard X11DPFF-SNR
Supermicro Motherboard X11QPL
Supermicro Motherboard X11SPA-T

Other versions of this model

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Questions about this item

Will these 128GB LRDIMMs run alongside my existing 2666MHz DDR4 modules on a Supermicro X11DPD-L?

The kit is backward compatible with 2133MHz, 2400MHz and 2666MHz speeds, but LRDIMMs cannot be mixed with unbuffered or registered ECC memory.

How can I confirm the 512GB kit is operating at CL21 after installation?

Check the BIOS or a tool such as dmidecode; each 128GB module should report DDR4 2933 PC4-23400 CL21 4Rx4 at 1.2V with ECC load-reduced status.

Does the 4x128GB package include heat spreaders or mounting brackets?

The modules ship without heat spreaders; only the four 288-pin LRDIMMs are included.

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