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Green circuit board with black memory chips, gold edge connector, no heat spreader

OWC

OWC 16GB DDR4 2666MHz CL19 ECC SODIMM 2Rx8 1.2V memory upgrade

SKU CH-ANEE-RQ0JY

16 GB DDR4 2666 MHz ECC SODIMM adds error-correcting memory to Synology DS1621+ and DS1621xs+ NAS systems

  • Total capacity16 GB (1 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • 16GB capacity expands NAS multitasking headroom
  • DDR4 2666MHz CL19 speed matches system spec
  • ECC protection guards data integrity in storage workloads
  • 2Rx8 260-pin SODIMM fits DS1621+ and DS1621xs+
  • 2V JEDEC standard keeps power draw low

Synology NAS ECC upgrade

This 16 GB DDR4 SODIMM is built for the Synology DiskStation DS1621+ and DS1621xs+. It delivers ECC protection for data integrity in NAS workloads. The unbuffered design keeps latency low for responsive file serving and virtualization tasks.

JEDEC standard 260-pin module

The stick follows JEDEC PC4-21300 timing at CL19 and runs at 1.2 V. No heat spreader is fitted, so it fits tight NAS chassis without clearance issues. Backward compatibility lets it clock down to 2400 MHz or 2133 MHz if the system requires it.

Low-voltage ECC operation

At 1.2 V the module draws minimal power inside a sealed NAS enclosure. ECC circuitry corrects single-bit errors without adding audible noise. The 2Rx8 organisation provides density while keeping thermal output modest for continuous operation.

How it compares

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

Price $129.99
Cheaper than about 64% 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 $8.12 per GB
Typical for this category: the median of 20,941 items is $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 DiskStationDS1621+
Synology DiskStationDS1621xs+

Questions about this item

Does the DDR4 2666MHz PC4-21300 interface run at 2666MHz in a Synology DS1621+?

Yes, the module is rated PC4-21300 2666MHz CL19 and will operate at that speed when installed in a compatible DS1621+ or DS1621xs+ NAS.

Will this 260-pin SODIMM fit the memory slot on a Synology DS1621xs+?

The module uses the standard 260-pin DDR4 SODIMM form factor required by the DS1621+ and DS1621xs+ memory slots.

How is the ECC SODIMM installed and what step is often missed?

Power off the NAS, open the chassis, insert the 260-pin module at an angle until the gold contacts are hidden, then press down until the side clips click; the step often missed is verifying the clips have fully latched on both sides.

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