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Green circuit board with black memory chips and gold edge connector

OWC

OWC 128GB DDR4 2933 CL21 8Rx4 288-pin 1.2V ECC LRDIMM 2L9D48R4128G memory upgrade

SKU CH-066K-WB4QP

A single 128 GB DDR4 2933 CL21 ECC load-reduced DIMM for Dell PowerEdge R740, R740XD, R940 and T640 servers

  • Capacity128GB
  • Type288-Pin DDR4 ECC LRDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes

Capacity 128GB

  • 128GB single module maximises server capacity
  • ECC load-reduced design protects data integrity in critical workloads
  • DDR4 2933MHz CL21 delivers high-speed responsiveness
  • 2V operation reduces power draw and heat output
  • Compatible with Dell PowerEdge R740 R740XD R940 T640 platforms

Server memory upgrade

This single 128GB DDR4 module uses the 288-pin LRDIMM form factor with ECC and load-reduced buffering. It is built for Dell PowerEdge R740, R740XD, R940 and T640 servers and will not work in standard desktop computers. Mixing with unbuffered or registered ECC memory is not supported.

DDR4 2933 practical limits

The module runs at 2933 MT/s with CL21 latency and 1.2V operation. It is backward compatible with 2133, 2400 and 2666 MT/s bus speeds, so it will clock down automatically when installed in systems that only support those lower rates. JEDEC compliance ensures standard signalling and timing behaviour.

Replacing lower-capacity LRDIMMs

Installing this 128GB stick replaces smaller load-reduced modules to increase total memory without adding extra DIMM slots. The upgrade is worthwhile when workloads need more capacity for virtualization, large databases or in-memory analytics and the platform already supports LRDIMM architecture.

Puntos fuertes

  • 128GB single module maximises server capacity
  • ECC load-reduced design protects data integrity in critical workloads
  • DDR4 2933MHz CL21 delivers high-speed responsiveness
  • 2V operation reduces power draw and heat output
  • Compatible with Dell PowerEdge R740 R740XD R940 T640 platforms

Especificaciones

BrandOWC
Part Number2L9D48R4128G
Capacity128GB
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

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Preguntas sobre este artículo

Should I pick the 128GB 2933 CL21 8Rx4 LRDIMM or a lower-capacity module for my Dell PowerEdge R740?

The 128GB module fills one 288-pin slot with maximum density, letting you reach higher total memory without occupying every slot on the R740, R740XD, R940 or T640.

What does the 2933 MT/s rating actually deliver when the module is installed in a PowerEdge server?

The module runs at 2933 MT/s on supported platforms and will down-clock to 2666, 2400 or 2133 MT/s if the system bus requires a lower speed.

How does the PC4-23400 LRDIMM interface limit real-world throughput compared to standard RDIMMs?

The load-reduced buffer cuts electrical load on the memory bus, allowing the 8Rx4 organisation to operate at 2933 MT/s where a standard registered DIMM of the same rank count would force a lower data rate.

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