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Two green circuit boards with gold edge connectors and black memory chips

OWC

OWC 16GB (2x8GB) DDR4 2666MHz CL19 ECC SODIMM 1.2V

SKU CH-R4JD-5MQ5H

16 GB dual-channel DDR4 ECC SODIMM kit at 2666 MHz CL19 for Synology DS723+ and DS923+ NAS

  • Total capacity16 GB (2 × 8 GB)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • ECC supportECC
  • Buffer typeUnbuffered
  • Kit configurationDual-Channel

Capacity 16GB (2 x 8GB)

  • 16 GB dual-channel kit boosts multitasking capacity
  • DDR4 2666 MHz CL19 delivers responsive system speed
  • ECC unbuffered design protects data integrity
  • 2 V operation reduces power draw
  • Compatible with Synology DS723+ and DS923+ NAS

DDR4 2666MHz ECC SODIMM kit

This 16GB kit contains two 8GB DDR4 2666MHz CL19 ECC unbuffered SODIMM modules. It is built for Synology DiskStation DS723+ and DS923+ NAS systems that require error-correcting memory. The 260-pin form factor fits compatible micro servers, NAS appliances and POS equipment. It is not for laptops or desktops that accept only non-ECC SODIMMs.

Sustained-load behaviour

JEDEC-standard timings and 1.2V operation keep latency stable during extended file transfers or multi-user database workloads. ECC corrects single-bit errors on the fly so data integrity holds across long uptime periods. Backward compatibility with 2400MHz and 2133MHz lets the kit downclock automatically if the platform demands it. Systems needing registered DIMMs or higher frequencies cannot use this kit.

Thermals noise and power

Low-voltage DDR4 draws minimal power and produces little heat without a heat spreader. Passive cooling inside a NAS chassis is sufficient for normal operation. Silent solid-state design adds no acoustic noise to the environment. Builders who need active cooling or higher voltage headroom should look elsewhere.

How it compares

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

Price $107.99
Pricier than about 62% of the 2,079 comparable items (median $70.99).
Total capacity 16 GB (2 × 8 GB)
Typical for this category: the median of 1,886 items is 16 GB.
Price per GB $6.75 per GB
Pricier than about 59% 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 number2C6D41R8016P
Total capacity16 GB (2 × 8 GB)
Product type260-Pin DDR4 SO-DIMM
Memory
CAS latencyCL19
ECC supportECC
Buffer typeUnbuffered
Kit configurationDual-Channel
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

2 more in the same range

Questions about this item

How much power does the 1.2V DDR4 kit draw when the NAS runs continuously?

Each module operates at 1.2 volts, the standard DDR4 voltage, so power draw stays low even during 24/7 NAS operation.

What must the Synology DS723+ or DS923+ already have to accept this 260-pin SO-DIMM upgrade?

The NAS needs an available DDR4 SO-DIMM slot that supports 2666 MHz ECC unbuffered memory; the kit is a direct drop-in for those models.

Will the 2666 MHz CL19 modules run stably alongside existing 2400 MHz sticks in the same system?

Yes, the kit is backward compatible with 2400 MHz and 2133 MHz speeds, so it will down-clock automatically to match slower installed modules.

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