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Green rectangular circuit board with gold edge connectors and black memory chips, no heat spreader

OWC

OWC 16GB DDR4 2666MHz CL19 ECC SODIMM 1.2V laptop RAM

SKU CH-B50Q-FK66Y

16 GB DDR4 ECC SO-DIMM at 2666 MHz CL19 for Synology DS723+ and DS923+ NAS

  • Total capacity16 GB (1 × 16 GB)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • ECC supportECC
  • Buffer typeUnbuffered
  • Product type260-Pin DDR4 SO-DIMM

Capacity 16GB (1 x 16GB)

  • 16 GB single module expands NAS memory capacity
  • DDR4 2666 MHz CL19 delivers responsive multitasking performance
  • ECC unbuffered design protects data integrity in micro servers
  • 2 V low-voltage operation reduces system power draw
  • JEDEC and RoHS compliant for warranty-safe upgrades

OWC 16GB DDR4 2666MHz ECC SODIMM

This OWC module provides 16GB of DDR4 memory at 2666MHz with CL19 latency. It operates at 1.2V and uses a 260-pin SODIMM form factor with ECC error correction. The unbuffered design targets compatible micro servers, NAS systems, and POS terminals requiring data integrity.

Suitable for Synology DS723+ and DS923+ upgrades

Buyers expanding memory in a Synology DiskStation DS723+ or DS923+ NAS will find this module validated for those platforms. Systems needing registered or buffered DIMMs, non-ECC memory, or capacities beyond a single 16GB stick should look at other options.

ECC unbuffered SODIMM decides fit

The single specification that determines compatibility is the ECC unbuffered SODIMM designation at 2666MHz CL19. Your motherboard or NAS must explicitly support DDR4 ECC unbuffered SO-DIMMs to use this module.

How it compares

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

Price $120.99
Pricier than about 65% of the 2,079 comparable items (median $70.99).
Total capacity 16 GB (1 × 16 GB)
Typical for this category: the median of 1,886 items is 16 GB.
Price per GB $7.56 per GB
Pricier than about 66% of the 1,886 comparable items (median $5.94 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 nameYes
Part number2C6D42R816 GB
Total capacity16 GB (1 × 16 GB)
Product type260-Pin DDR4 SO-DIMM
Memory
CAS latencyCL19
ECC supportECC
Buffer typeUnbuffered
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

2 more in the same range

Questions about this item

Will the ECC SODIMM need periodic replacement like a battery?

No, the 16 GB DDR4 module has no moving parts or consumable cells; it runs at 1.2 V and requires no scheduled replacement under normal use.

What limits sustained throughput first, the CL19 latency or the 2666 MT/s bus?

The 2666 MT/s PC4-21300 bus caps peak bandwidth; CL19 adds fixed cycle delay but does not throttle continuous transfer rates.

How much heat and power does the unbuffered 2Rx8 stick produce in a NAS running 24/7?

At 1.2 V the module draws only a few watts and has no heat spreader, so it adds minimal warmth inside a DS723+ or DS923+ chassis.

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