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Four green DDR4 LRDIMM sticks with gold contacts, no heat spreaders

OWC

OWC 128GB (4x32GB) DDR4 2400MHz CL17 ECC Load Reduced LRDIMM 1.2V 288-pin Server RAM

SKU CH-CM77-R644B

128 GB kit of four 32 GB DDR4 2400 MHz CL17 ECC load-reduced LRDIMMs at 1.2 V for servers and workstations

  • Capacity128GB (4 x 32GB)
  • Type288-Pin DDR4 ECC LRDIMM
  • SpeedDDR4 2400 (PC4 19200)
  • CAS LatencyCL17
  • Voltage1.2V
  • ECCYes

Capacity 128GB (4 x 32GB)

  • 128GB total capacity from four 32GB modules
  • DDR4 2400MHz speed with CL17 latency
  • ECC load-reduced design for server reliability
  • 2V operation reduces power consumption
  • Backward compatible with 2133MHz systems

Server-grade DDR4 kit

This OWC kit provides 128GB of DDR4 memory across four 32GB LRDIMM modules. It is built for servers, workstations and NAS systems that require ECC load-reduced registered memory. The modules operate at 2400MHz with a CL17 latency and 1.2V voltage. Standard desktop computers cannot use this memory type.

Thermals and power

Each module runs at the JEDEC-standard 1.2V, keeping power draw low for high-density server configurations. No heat spreaders are fitted, so airflow across the DIMM slots handles cooling in normal operation. The load-reduced design reduces electrical load on the memory controller, helping maintain signal integrity at full population. Acoustic output is determined by the system fans rather than the memory itself.

Build integration

The 288-pin LRDIMMs install in DDR4 server or workstation boards that support ECC load-reduced memory and 4Rx4 rank configuration. They cannot be mixed with unbuffered or standard registered DIMMs. The kit is backward compatible with 2133MHz operation if the platform requires it. Four modules fill a quad-channel or dual-channel arrangement depending on the motherboard layout.

Puntos fuertes

  • 128GB total capacity from four 32GB modules
  • DDR4 2400MHz speed with CL17 latency
  • ECC load-reduced design for server reliability
  • 2V operation reduces power consumption
  • Backward compatible with 2133MHz systems

Especificaciones

BrandOWC
Part Number2L4D44R4128S
Capacity128GB (4 x 32GB)
Type288-Pin DDR4 ECC LRDIMM
SpeedDDR4 2400 (PC4 19200)
CAS LatencyCL17
Voltage1.2V
ECCYes
Buffered/RegisteredLoad Reduced
Rank4Rx4
Multi-channel KitDual Channel Kit
Heat SpreaderNo

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Preguntas sobre este artículo

How do I install the 288-pin LRDIMM modules and what step is often missed?

Align the notch on each 32GB module with the slot key, press down until both retention clips click, and populate all four slots as a matched 4Rx4 kit so the server recognises the full 128GB capacity.

What maintenance or replacement will the ECC LRDIMM kit need over time?

The modules have no heat spreaders and no moving parts, so no routine maintenance is required; replacement is only necessary if a module fails, which is covered by the manufacturer's limited lifetime warranty.

What limit appears first when the 2400MHz CL17 memory runs under sustained server load?

The DDR4-2400 bus speed and CL17 latency set the throughput ceiling; sustained workloads will saturate the PC4-19200 bandwidth before voltage or thermal limits are reached.

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