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Green rectangular circuit board with black memory chips and gold edge connectors

OWC

OWC 16GB DDR4 2666 CL19 ECC Unbuffered DIMM desktop RAM

SKU CH-HRZJ-19R0K

Adds 16 GB of DDR4 2666 ECC memory to workstations, servers or NAS systems with a 288-pin unbuffered DIMM slot

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Recommended forWorkstations, Servers, and NAS Systems
  • ECC protection guards data integrity in critical workloads
  • 16GB capacity expands multitasking headroom for demanding apps
  • DDR4 2666 speed delivers responsive system performance
  • 2V operation reduces power draw and heat
  • 288-pin unbuffered DIMM fits standard desktop and NAS slots

16GB ECC DIMM for Workstations and NAS

This 16GB DDR4 2666 CL19 module adds error-correcting memory to desktop PCs, workstations, servers and NAS systems. It runs at 1.2V in a standard 288-pin unbuffered form factor. The JEDEC-compliant design ensures a warranty-safe upgrade path for compatible platforms.

Capacity and headroom

A single 16GB stick provides ample space for multitasking, large file handling and virtual machines in supported systems. The module operates at PC4-21300 speed with CL19 latency and remains backward compatible with 2133MHz and 2400MHz bus speeds. Memory-intensive workloads scale until total installed capacity reaches the host platform's limit.

Thermals noise and power draw

With no heat spreader or LEDs the module relies on case airflow and draws only 1.2V during normal operation. Passive construction means zero fan noise from the memory itself. Power consumption stays low while ECC circuitry continuously monitors data integrity in the background.

How it compares

Measured against everything we stock in Desktop RAM, at today’s prices. Recalculated every night.

Price $110.99
Typical for this category: the median of 3,647 items is $90.99.
Total capacity 16 GB
Typical for this category: the median of 3,251 items is 16 GB.
Price per GB $6.94 per GB
Typical for this category: the median of 3,251 items is $6.75 per GB.

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Specifications

Product
Brand nameOWC
Part number2E6D42R816 GB
Total capacity16 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Recommended forWorkstations, Servers, and NAS Systems
More details
LED lightingNone

Questions about this item

Will the 2666MHz DDR4 ECC DIMM run with my existing 2133MHz sticks?

Yes, the module is backward compatible with 2133MHz and 2400MHz DDR4 systems, so it will downclock to match the slower memory.

How can I verify the 16GB ECC module is recognised after installation?

Check the BIOS or operating system memory report; it should show 16GB at 2666MHz with ECC enabled.

Does the 288-pin DIMM ship with a heat spreader or any extra accessories?

The module has no heat spreader and no additional accessories are included; only the DIMM itself is in the box.

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