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Eight green DDR4 LRDIMM modules with gold contacts in a row

OWC

OWC 1TB (8x128GB) DDR4 2933 CL21 8Rx4 LRDIMM ECC memory upgrade

SKU CH-XGZ9-56M1D

Eight 128 GB DDR4-2933 ECC load-reduced DIMMs add 1 TB to compatible Dell PowerEdge servers

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

Capacity 1TB (8 x 128GB)

  • 1TB server memory upgrade in an 8-module kit
  • 128GB DDR4 2933 CL21 ECC LRDIMM per module
  • JEDEC and RoHS compliant for warranty-safe installs
  • Load-reduced design for Dell PowerEdge R740, R740XD, R940, T640
  • Backward compatible with 2133, 2400 and 2666MHz systems

Server-grade DDR4 ECC LRDIMM kit

This OWC memory kit delivers 1 TB of DDR4 ECC Load-Reduced DIMMs in eight 128 GB modules. It is built for Dell PowerEdge R740, R740XD, R940 and T640 servers that require registered ECC memory. Standard desktop boards cannot use these modules, and they must not be mixed with unbuffered or standard registered DIMMs.

Capacity and headroom

The 1 TB total capacity lets you run large virtualisation clusters, in-memory databases or heavy analytics workloads without swapping. Each module operates at DDR4 2933 (PC4-23400) with CL21 latency and 1.2 V. The kit also runs at 2666, 2400 and 2133 MHz when the platform demands lower speeds. Systems needing more than 1 TB or non-ECC memory will not be served by this kit.

Build integration

The 288-pin LRDIMM form factor fits the listed PowerEdge slots directly, requiring no extra cooling or adapters. JEDEC and RoHS compliance keeps the upgrade warranty-safe for the supported Dell platforms. Builders targeting other server families or consumer motherboards must choose a different memory type.

Highlights

  • 1TB server memory upgrade in an 8-module kit
  • 128GB DDR4 2933 CL21 ECC LRDIMM per module
  • JEDEC and RoHS compliant for warranty-safe installs
  • Load-reduced design for Dell PowerEdge R740, R740XD, R940, T640
  • Backward compatible with 2133, 2400 and 2666MHz systems

Specifications

BrandOWC
Part Number2L9D48R41TBK
Capacity1TB (8 x 128GB)
Type288-Pin DDR4 ECC LRDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredLoad Reduced
Rank8Rx4
Heat SpreaderNo
Compatible SystemDell PowerEdge R740
Dell PowerEdge R740XD
Dell PowerEdge R940
Dell PowerEdge T640

Other versions of this model

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Questions about this item

Can I keep my existing 2133MHz or 2400MHz DDR4 modules and add these 2933MHz LRDIMMs?

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

How can I verify the 1TB kit is running at the correct 2933MHz CL21 speed after installation?

Check the system BIOS or UEFI memory configuration screen; it should report DDR4 2933 PC4-23400 CL21 at 1.2V for each of the eight 128GB 8Rx4 LRDIMMs.

Does the 2L9D48R41TBK kit include only the eight 288-pin LRDIMMs or any extra parts?

The kit consists of eight 128GB DDR4 2933 CL21 8Rx4 288-pin 1.2V ECC Load Reduced LRDIMMs; no cables, brackets or additional components are included.

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