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Green rectangular DDR4 RDIMM module with black memory chips and gold edge connectors

OWC

OWC 32GB DDR4 2666MHz ECC Registered RDIMM 2Rx4 CL19 1.2V 288-Pin

SKU CH-XHR0-MMR2E

32GB DDR4 2666MHz ECC registered RDIMM for servers, workstations and NAS systems, CL19 1.2V 2Rx4 288-pin, backward compatible with 2133MHz and 2400MHz

  • Capacity32GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes
  • 32GB capacity for demanding server workloads
  • DDR4 2666MHz CL19 speed for responsive performance
  • ECC registered design protects data integrity
  • 2V operation reduces power consumption
  • 288-pin RDIMM fits server and workstation systems

Server memory upgrade

This 32GB DDR4 ECC Registered RDIMM is built for servers, workstations and NAS systems that require registered memory with error correction. It will not work in standard desktop computers and cannot be mixed with unbuffered modules. Buyers who need non-ECC or unbuffered memory for a consumer platform should look elsewhere.

Registered ECC with 2Rx4 organisation

The module runs at DDR4 2666MHz (PC4-21300) with CL19 latency at 1.2V and uses a 2Rx4 rank configuration. JEDEC compliance and RoHS certification mean it matches the original Samsung M393A4K40BB2-CTD, M393A4K40CB2-CTD and M393A4K40DB2-CTD specifications exactly. Systems that require a different rank layout or voltage will not accept this part.

Sustained operation in multi-DIMM configs

Registered buffering reduces electrical load on the memory controller, allowing stable operation when many modules are populated over long periods. ECC corrects single-bit errors on the fly, preventing data corruption during continuous workloads. Backward compatibility with 2133MHz and 2400MHz buses lets the module down-clock without instability.

Puntos fuertes

  • 32GB capacity for demanding server workloads
  • DDR4 2666MHz CL19 speed for responsive performance
  • ECC registered design protects data integrity
  • 2V operation reduces power consumption
  • 288-pin RDIMM fits server and workstation systems

Especificaciones

BrandOWC
Part Number2R6D42R432GB
Capacity32GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo

Preguntas sobre este artículo

What does the 2666 MHz speed mean once this module is installed in a server?

The module will run at 2666 MHz on platforms that support it, and it will automatically down-clock to 2400 MHz or 2133 MHz on older systems.

How does the registered DDR4 interface affect what the module can do?

The registered design adds a buffer that lets the memory controller drive larger capacities, but it prevents use in standard desktop boards and it cannot be mixed with unbuffered DIMMs.

What physical slot does this 288-pin RDIMM need to fit?

It requires a 288-pin DDR4 DIMM socket keyed for registered ECC modules, as found in compatible servers, workstations and NAS systems.

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