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Green rectangular DDR4 memory module with gold contacts and black chips, no heat spreader

OWC

OWC 2R6D42R816GB 16GB DDR4 2666 ECC Registered RDIMM

SKU CH-CF5H-JC9TN

16 GB DDR4 2666 ECC registered RDIMM for servers, workstations and NAS systems

  • Capacity16GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes
  • ECC protection prevents data corruption in servers
  • Registered design stabilises signal integrity under heavy loads
  • 16 GB capacity expands memory for virtualisation workloads
  • 2666 MHz speed with CL19 latency matches QNAP specifications
  • 2 V operation reduces power draw and heat output

Capacity and purpose

This 16GB DDR4 2666 ECC Registered RDIMM is built for servers, workstations and compatible NAS systems that require registered memory with error correction. It replaces QNAP part numbers RAM-16GDR4ECK0-RD-2666 and RAM-16GDR4ECT0-RD-2666. Buyers needing unbuffered desktop memory or higher-capacity single modules cannot use this product.

Compatibility checks

Verify that your platform accepts 288-pin DDR4 Registered DIMMs running at 1.2V with CL19 latency and a 2Rx8 organisation. The module is backward compatible with 2133MHz and 2400MHz slots, but it will not work in systems that only support unbuffered or non-ECC memory. Confirm the maximum supported capacity per slot before ordering.

Build integration

The RDIMM plugs directly into a 288-pin DDR4 server or workstation slot and draws 1.2V, leaving other DIMM channels free for additional registered modules. Because it is registered and ECC, it cannot be mixed with unbuffered memory in the same system. No heat spreader is fitted, so airflow around the module should be adequate for sustained loads.

Puntos fuertes

  • ECC protection prevents data corruption in servers
  • Registered design stabilises signal integrity under heavy loads
  • 16 GB capacity expands memory for virtualisation workloads
  • 2666 MHz speed with CL19 latency matches QNAP specifications
  • 2 V operation reduces power draw and heat output

Especificaciones

BrandOWC
Part Number2R6D42R816GB
Capacity16GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx8
Heat SpreaderNo

Preguntas sobre este artículo

Does the 288-pin 16GB module ship alone or with any extra brackets or cables?

The module ships as a single 288-pin DDR4 RDIMM. No brackets, cables or additional hardware are included.

Should I pick this 2666 CL19 2Rx8 stick or a different speed or rank for my NAS?

Choose this 2666 CL19 2Rx8 module when your system specifies PC4-21300 ECC registered memory; it also runs at 2400 and 2133 if the platform requires a lower speed.

What does the PC4-21300 2666 rating actually deliver once the DIMM is installed in a server?

The DIMM operates at 2666 MT/s with CL19 latency at 1.2 V, providing ECC error correction and registered buffering for stable server and NAS workloads.

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