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

OWC

OWC 16GB DDR4 2666 ECC Registered RDIMM 2Rx8 CL19 1.2V server RAM

SKU CH-YZKS-69EK3

16 GB DDR4 2666 MHz ECC registered RDIMM for servers, workstations and NAS, CL19 1.2 V 2Rx8

  • Capacity16GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes
  • 16 GB DDR4 2666 MHz CL19 ECC registered RDIMM for reliable server workloads
  • 2Rx8 organisation and 1.2 V operation keep power draw low in dense configurations
  • 288-pin JEDEC PC4-21300 module drops into existing 2133 MHz or 2400 MHz slots
  • Designed as a direct replacement for Samsung M393A2K43BB1-CTD, M393A2K43CB2-CTD and M393A2K43DB2-CTD parts
  • OWC limited lifetime warranty with free technical support protects the upgrade long term

Server ECC RDIMM Upgrade

This OWC 16GB DDR4 2666MHz ECC Registered RDIMM is built for servers, workstations and NAS systems that require registered memory with error correction. It uses a 288-pin form factor and operates at 1.2V with CL19 latency.

Replacing Slower DDR4 Modules

The module replaces DDR4 2133MHz or 2400MHz sticks while keeping full JEDEC compliance. The jump is worth it when your platform supports 2666MHz and you need the higher PC4-21300 bandwidth for memory-bound workloads.

Sustained Load Behaviour

Without a heat spreader the module relies on chassis airflow to maintain 1.2V stability during extended operations. Registered buffering and ECC correction keep data integrity intact across long compute cycles in multi-DIMM configurations.

Points forts

  • 16 GB DDR4 2666 MHz CL19 ECC registered RDIMM for reliable server workloads
  • 2Rx8 organisation and 1.2 V operation keep power draw low in dense configurations
  • 288-pin JEDEC PC4-21300 module drops into existing 2133 MHz or 2400 MHz slots
  • Designed as a direct replacement for Samsung M393A2K43BB1-CTD, M393A2K43CB2-CTD and M393A2K43DB2-CTD parts
  • OWC limited lifetime warranty with free technical support protects the upgrade long term

Caractéristiques

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

Questions sur cet article

Does the 288-pin RDIMM fit a standard server DIMM slot?

Yes — the module uses the 288-pin DDR4 ECC Registered form factor that matches standard server and workstation DIMM slots.

How do I install the module, and what step is often missed?

Power down the system, open the chassis, align the notch on the 288-pin edge connector with the slot key, press firmly until both retention clips click, then verify in BIOS that the 2666 MT/s speed and ECC Registered mode are detected.

Will the ECC Registered chips need replacement or firmware updates later?

The DRAM itself has no moving parts or firmware; replacement is only needed if a module fails or capacity must be increased, and any added modules must also be ECC Registered 2Rx8 at 1.2 V.

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