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Green circuit board with black chips, no heat spreader, 288-pin DDR4 DIMM

OWC

OWC 2E6D42R816GB 16GB DDR4 2666MHz CL19 ECC UDIMM desktop RAM

SKU CH-SXJ2-BF8BR

16 GB DDR4 ECC UDIMM running at 2666 MHz CL19 for workstations, servers and NAS systems

  • Capacity16GB
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes
  • Buffered/RegisteredUnbuffered

Capacity 16GB

  • ECC protection guards data integrity in workstations and servers
  • 16 GB capacity lets you run more apps and larger files simultaneously
  • 2666 MHz DDR4 speed with CL19 latency delivers responsive multitasking
  • 2 V low-voltage operation reduces power draw and heat
  • Backward compatible with 2133 MHz and 2400 MHz systems for easy upgrades

Capacity and purpose

This single OWC module provides 16 GB of DDR4 memory rated at 2666 MHz with CL19 latency. It is built as an unbuffered ECC UDIMM for workstations, servers and NAS systems that require error-correcting code protection.

Compatibility checks

Verify that your motherboard accepts DDR4 ECC unbuffered DIMMs and runs at 1.2 V. The module is backward compatible with 2133 MHz and 2400 MHz bus speeds, so it will down-clock automatically if the platform does not support the full 2666 MHz rate.

Build and connectors

The black printed-circuit board has no heat spreader and uses a standard 288-pin edge connector. Because it is unbuffered, it installs directly into any compatible desktop UDIMM slot without registered-buffer circuitry, keeping the memory path simple for daily operation.

Highlights

  • ECC protection guards data integrity in workstations and servers
  • 16 GB capacity lets you run more apps and larger files simultaneously
  • 2666 MHz DDR4 speed with CL19 latency delivers responsive multitasking
  • 2 V low-voltage operation reduces power draw and heat
  • Backward compatible with 2133 MHz and 2400 MHz systems for easy upgrades

Specifications

BrandOWC
Part Number2E6D42R816GB
Capacity16GB
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredUnbuffered
ColorBlack
Heat SpreaderNo
Recommend UseWorkstations, Servers, and NAS Systems
LED ColorNone

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Will this 16 GB DDR4-2666 ECC UDIMM work in a standard desktop motherboard?

It fits 288-pin DDR4 slots, but the board must support ECC unbuffered memory; many consumer desktops ignore ECC, so check the manual first.

Can I mix this module with existing 2133 MHz or 2400 MHz DDR4 sticks?

Yes, it is backward compatible and will run at the slower speed of the slowest installed module.

Does the module need a heat spreader or active cooling for server or NAS use?

No heat spreader is included; standard case airflow is sufficient for the 1.2 V JEDEC-rated module.

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