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Eight green DDR4 LRDIMM modules in anti-static tray

OWC

OWC 1TB (8x128GB) DDR4 2933 CL21 ECC LRDIMM 2L9D44R41TBK memory upgrade

SKU CH-A3J3-YZ88R

Eight-module kit delivers 1TB of DDR4 2933 ECC LRDIMM memory for compatible Supermicro server motherboards

  • Capacity1TB (8 x 128GB)
  • Type288-Pin DDR4 ECC LRDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes

Capacity 1TB (8 x 128GB)

Struck-through versions exist but are not stocked here.

  • 1TB server capacity with 8x128GB modules
  • ECC load-reduced design for data integrity
  • DDR4 2933 CL21 at 1.2V operation
  • JEDEC and RoHS compliant warranty-safe upgrade
  • Backward compatible with 2133 2400 2666 speeds

Server-grade memory kit

This OWC kit provides 1TB of DDR4 memory across eight 128GB load-reduced DIMMs. It is built for Supermicro X11 series server and workstation boards including the X11DPD-L, X11DPD-M25, X11DPFF-SNR, X11QPL and X11SPA-T. The modules operate at 2933MHz with CL21 latency and 1.2V power. They are not compatible with standard desktop computers.

Load-reduced DDR4 constraints

Load-reduced ECC DIMMs cannot be mixed with unbuffered or registered ECC memory in the same system. The 288-pin DDR4 form factor fits only platforms designed for this registered server standard. Backward compatibility covers 2133MHz, 2400MHz and 2666MHz bus speeds on supported hardware. JEDEC and RoHS compliance ensures specification adherence.

Eight-module 1TB capacity

The decisive specification is the 1TB total capacity delivered as eight 128GB 4Rx4 modules. Buyers who need a smaller increment or fewer DIMM slots should not choose this kit. It is intended for maximising supported memory on the listed Supermicro motherboards.

Highlights

  • 1TB server capacity with 8x128GB modules
  • ECC load-reduced design for data integrity
  • DDR4 2933 CL21 at 1.2V operation
  • JEDEC and RoHS compliant warranty-safe upgrade
  • Backward compatible with 2133 2400 2666 speeds

Specifications

BrandOWC
Part Number2L9D44R41TBK
Capacity1TB (8 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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Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Should I buy the 1 TB kit with eight 128 GB modules or a smaller kit for my Supermicro X11DPD-L?

The kit supplies eight 128 GB LRDIMMs for a total of 1 TB; choose it only if your board has eight free slots and the workload needs that capacity.

What does DDR4 2933 CL21 mean for real-world server throughput?

The modules run at 2933 MT/s with CAS latency 21, giving standard JEDEC DDR4-2933 latency and bandwidth for supported Supermicro platforms.

Will the PC4-23400 rating limit speed if my motherboard only supports 2666 MT/s?

The DIMMs are backward compatible with 2133, 2400 and 2666 MT/s and will automatically down-clock to the highest speed the board allows.

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