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Green circuit board with gold edge connector and black memory chips, no heat spreader

OWC

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

SKU CH-J275-QJY53

128GB DDR4 2933 ECC load-reduced DIMM for Dell PowerEdge FC640, M640, MX740c, MX840c and R640 servers

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

Capacity 128GB

  • 128 GB single-module capacity fits dense server configurations
  • 2933 MHz DDR4 speed with CL21 latency supports demanding workloads
  • ECC load-reduced design maintains data integrity in multi-socket systems
  • 2 V operation reduces power draw per installed module
  • Validated for Dell PowerEdge FC640, M640, MX740c, MX840c and R640

Server memory upgrade

This single 128GB DDR4 LRDIMM module is built for Dell PowerEdge FC640, M640, MX740c, MX840c and R640 servers. It delivers ECC load-reduced operation at 2933MHz with CL21 latency and 1.2V power. The 8Rx4 288-pin design targets administrators who need maximum capacity per slot in compatible enterprise systems.

Thermals and power

Operating at 1.2V, the module runs at standard DDR4 voltage for load-reduced DIMMs. No heat spreader is fitted, so airflow within the server chassis handles cooling. The JEDEC-compliant design maintains rated speed and latency without additional power draw beyond the 1.2V specification.

Upgrade context

This LRDIMM cannot be mixed with unbuffered or registered ECC memory, so it suits fresh population or full replacement rather than partial upgrades. Backward compatibility with 2133, 2400 and 2666MHz buses allows installation in slots running at lower speeds. Buyers needing smaller capacities or non-LRDIMM ECC types should look elsewhere.

Helstu kostir

  • 128 GB single-module capacity fits dense server configurations
  • 2933 MHz DDR4 speed with CL21 latency supports demanding workloads
  • ECC load-reduced design maintains data integrity in multi-socket systems
  • 2 V operation reduces power draw per installed module
  • Validated for Dell PowerEdge FC640, M640, MX740c, MX840c and R640

Tæknilýsing

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 FC640
Dell PowerEdge M640
Dell PowerEdge MX740c
Dell PowerEdge MX840c
Dell PowerEdge R640

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Spurningar um þessa vöru

How do I install this 288-pin LRDIMM in a Dell PowerEdge R640 and what step do people get wrong?

Power down the server, open the chassis, align the 288-pin key notch with the DIMM slot, press firmly until the ejector tabs click, then verify in BIOS that the module runs at 2933 MHz; the common mistake is mixing this 8Rx4 Load Reduced module with Registered or Unbuffered DIMMs, which the platform does not support.

What maintenance or replacement will this 128GB DDR4 2933 CL21 module need later?

No routine maintenance is required; if a memory error appears, run the Dell iDRAC diagnostics to isolate the faulty DIMM and replace that single 128GB module — ECC corrects single-bit errors on the fly, but a persistent multi-bit fault means the module itself must be swapped.

What limit shows up first under sustained load with this 1.2V 8Rx4 LRDIMM?

The thermal envelope of the Dell PowerEdge chassis typically limits sustained throughput before the memory controller reaches its 2933 MHz ceiling; adequate airflow across the 288-pin slots keeps the 1.2V modules within spec during continuous operation.

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