We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
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

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx8
  • 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.

How it compares

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

Price $111.99
Cheaper than about 65% of the 6,523 comparable items (median $188.99).
Total capacity 16 GB
Lower than about 60% of the 6,064 comparable items (median 32 GB).
Price per GB $7.00 per GB
Typical for this category: the median of 6,064 items is $7.25 per GB.

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number2R6D42R816 GB
Total capacity16 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V

Questions about this item

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.

More in ECC Server RAM

Similar items