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Green rectangular DDR4 RDIMM module with black chips on both sides and gold edge contacts

OWC

OWC 64GB DDR4 2666MHz ECC Registered RDIMM 288-Pin 2Rx4 1.2V CL19 server RAM

SKU CH-33XC-GH8E4

64GB DDR4 2666MHz ECC registered RDIMM with CL19 latency and 1.2V operation for servers and workstations

  • Capacity64GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes
  • 64 GB capacity supports heavy virtualization workloads
  • ECC registered design detects and corrects memory errors
  • DDR4 2666 MHz CL19 delivers high-throughput server performance
  • 2 V operation reduces power draw in dense configurations
  • Backward compatible with 2133 MHz and 2400 MHz systems

Server-grade 64 GB DDR4 ECC RDIMM

This 64 GB DDR4 2666 MHz ECC registered DIMM targets administrators who need reliable, high-capacity memory for servers, workstations or NAS systems. It delivers 64 GB per module at PC4-21300 speed with CL19 latency and 1.2 V operation. The registered design and ECC support make it suitable for mission-critical workloads where data integrity matters.

JEDEC-compliant registered build without heat

The module follows JEDEC-standard specifications and is RoHS compliant, ensuring a warranty-safe upgrade path. Its 288-pin RDIMM form factor fits standard DDR4 server slots, while the registered buffer reduces electrical load on the memory controller. No heat spreader is present, so airflow in the chassis must handle thermal management directly.

Limited to DDR4 platforms that accept registered

This memory will not work in standard desktop computers and cannot be mixed with unbuffered modules. Backward compatibility covers 2133 MHz and 2400 MHz DDR4 speeds, but the module remains bound to the DDR4 generation and registered ECC requirement. Buyers needing unbuffered or non-ECC memory, or a different DDR generation, must look elsewhere.

Points forts

  • 64 GB capacity supports heavy virtualization workloads
  • ECC registered design detects and corrects memory errors
  • DDR4 2666 MHz CL19 delivers high-throughput server performance
  • 2 V operation reduces power draw in dense configurations
  • Backward compatible with 2133 MHz and 2400 MHz systems

Caractéristiques

BrandOWC
Part Number2R6D42R464GB
Capacity64GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo

Questions sur cet article

What speed does the DDR4 2666MHz PC4-21300 interface cap at in practice?

The module runs at 2666MHz with CL19 latency and is backward compatible with 2133MHz and 2400MHz systems.

What physical slot and form factor does this 64GB 288-Pin RDIMM need to fit?

It requires a 288-pin DDR4 ECC Registered DIMM slot in a server, workstation or NAS system.

How is this ECC Registered RDIMM installed, and what step do people often get wrong?

Insert the module into a compatible registered DIMM slot; do not mix it with unbuffered memory or use it in a standard desktop.

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