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

OWC

OWC 16GB DDR4 2666MHz ECC UDIMM CL19 1.2V 2Rx8 Synology RS2418+ RS2418RP+

SKU CH-RRWB-TF60P

16 GB DDR4 ECC UDIMM at 2666 MHz CL19 1.2 V, validated for Synology RS2418+ and RS2418RP+ NAS systems

  • Total capacity16 GB (1 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • 16 GB ECC module protects data integrity in Synology RS2418+ and RS2418RP+
  • 2666 MHz DDR4 speed with CL19 latency accelerates NAS workloads
  • 2 V operation reduces power draw and heat in rackmount servers
  • 2Rx8 288-pin unbuffered design installs easily without registration overhead
  • Backward compatible with 2133 MHz and 2400 MHz systems for flexible upgrades

16GB DDR4 ECC UDIMM for Synology RS2418+

This 16GB DDR4 2666MHz ECC unbuffered DIMM is built for Synology RackStation RS2418+ and RS2418RP+ NAS units. It delivers 16GB capacity in a single 288-pin module with CL19 latency and 1.2V operation. The 2Rx8 organisation suits workloads that demand error-correcting memory for data integrity.

Check slot count and current population

Verify how many memory slots your RS2418+ or RS2418RP+ has free before ordering. The system accepts DDR4 2666, 2400 and 2133MHz ECC UDIMMs, so this module will clock down if existing sticks run slower. Confirm the chassis can be opened for DIMM access without voiding any service agreement you may hold.

Upgrade from 8GB or smaller modules

Replacing an 8GB stick with this 16GB module doubles per-slot capacity, letting you reach higher totals within the same slot count. The jump is worth it when virtual machines, Docker containers or large file caches push the NAS into swap. If your unit already runs at its maximum supported memory, this module adds no benefit.

How it compares

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

Price $123.99
Cheaper than about 65% 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 $7.75 per GB
Typical for this category: the median of 20,941 items is $8.19 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 number2E6D42R816 GB
Total capacity16 GB (1 × 16 GB)
Product type288-Pin DDR4 ECC UDIMM
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 RackstationRS2418+
Synology RackstationRS2418RP+

Questions about this item

What comes in the box and do I need anything else to install it in my Synology RS2418+?

The box contains one 16GB DDR4 2666MHz ECC UDIMM module. No extra parts or tools are required for installation in the compatible NAS.

Should I choose this 16GB module or a different capacity for my RS2418RP+?

This single 16GB DIMM is the listed capacity; select it when you need to add 16GB to an available slot in the RS2418+ or RS2418RP+.

What does the 2666MHz rating actually deliver once the module is running in the NAS?

The module operates at 2666MHz CL19 with 1.2V ECC unbuffered signalling and will down-clock to 2400MHz or 2133MHz if the system requires it.

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