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Green circuit board with black memory chips, 260-pin SODIMM form factor, no heat spreader

OWC

OWC 16GB DDR4 2666MHz CL19 ECC SODIMM 1.2V memory upgrade

SKU CH-5CNN-ARD1F

16 GB DDR4 2666 MHz ECC SODIMM for Synology DS1823XS+ NAS, CL19 1.2 V unbuffered

  • Total capacity16 GB (1 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • 16 GB capacity lets you run more apps and larger files simultaneously
  • DDR4 2666 MHz CL19 speed keeps data flowing for responsive NAS workloads
  • ECC protection detects and corrects memory errors to safeguard stored data
  • 2 V low voltage reduces power draw and heat in always-on systems
  • JEDEC and RoHS compliant module validated for Synology DS1823XS+ compatibility

16GB DDR4 ECC SODIMM for Synology DS1823XS+

This 16GB DDR4 2666MHz CL19 ECC SODIMM module is built specifically for the Synology DiskStation DS1823XS+. It operates at 1.2V using unbuffered 2Rx8 chips on a 260-pin form factor. The JEDEC-standard design ensures a warranty-safe upgrade for compatible NAS systems.

Upgrade from 2133MHz or 2400MHz modules

The module is backwards compatible with 2133MHz and 2400MHz speeds, allowing it to replace slower DDR4 SODIMMs in the DS1823XS+. The jump is worth it when the workload demands the full 2666MHz data rate and ECC integrity for sustained operation.

Single 16GB module capacity

One 16GB stick adds significant headroom for virtual machines, large file caches and concurrent user sessions on the DS1823XS+. It runs out when the total installed memory reaches the platform's maximum supported capacity or when a workload requires registered DIMMs instead of unbuffered SODIMMs.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $116.99
Cheaper than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB (1 × 16 GB)
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $7.31 per GB
Cheaper than about 55% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2C6D42R816 GB
Total capacity16 GB (1 × 16 GB)
Product type260-Pin DDR4 ECC SODIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology DiskStationDS1823XS+

Questions about this item

Will this 260-pin DDR4 SODIMM fit the memory slots in my Synology DiskStation DS1823XS+?

Yes, the module uses the standard 260-pin DDR4 SODIMM form factor required by the DS1823XS+ and is listed as compatible with that model.

What is the correct way to seat the module, and what step do people often miss?

Align the notch on the module with the key in the slot, insert at an angle, then press down firmly until both side clips click; the step often missed is pressing hard enough to engage both clips fully.

Will I ever need to replace this ECC SODIMM, and how would I know?

ECC memory rarely fails, but if the NAS logs correctable errors that become uncorrectable or the system fails to boot with the module installed, replacement would be needed.

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