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Two green DDR4 UDIMM sticks with gold contacts and black chips, no heat spreader

OWC

OWC 16GB (2x8GB) DDR4 2666 ECC UDIMM memory upgrade

SKU CH-670D-QHN5G

16 GB DDR4 2666 ECC UDIMM kit adds 2×8 GB CL19 memory to Synology FlashStation FS2500 at 1.2 V

  • Total capacity16 GB (2 × 8 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank1Rx8

Capacity 16GB (2 x 8GB)

  • 16 GB dual-channel kit boosts NAS capacity
  • ECC UDIMM protects data integrity in Synology FS2500
  • DDR4 2666 CL19 at 1.2 V for efficient speed
  • JEDEC & RoHS compliant ensures warranty-safe upgrade
  • Backward compatible with 2133 and 2400 MHz systems

System-Specific DDR4 ECC Kit

This 16 GB kit contains two 8 GB DDR4 2666 modules built for the Synology FlashStation FS2500. It delivers ECC error correction in an unbuffered 288-pin UDIMM form factor at 1.2 V. The kit targets administrators who need validated, warranty-safe memory for that specific NAS platform.

JEDEC DDR4 2666 Practical Limits

The modules run at the JEDEC-standard 2666 MT/s with CL19 latency and will down-clock to 2133 or 2400 MT/s if the system requires it. They are unbuffered, so they must be installed in platforms that accept unbuffered ECC UDIMMs; registered or load-reduced slots will not work. No heat spreader is fitted, so airflow in the chassis must be adequate.

1Rx8 Rank Determines Fit

Each DIMM uses a single-rank 1Rx8 organisation, which the FS2500 memory controller expects for this capacity. Systems that require dual-rank 2Rx8 modules or a different rank-per-channel limit will not support this kit. Verify the platform’s qualified-vendor list before purchase.

How it compares

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

Price $107.99
Cheaper than about 67% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB (2 × 8 GB)
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $6.75 per GB
Cheaper than about 59% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2E6D41R8016P
Total capacity16 GB (2 × 8 GB)
Product type288-Pin DDR4 ECC UDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology FlashstationFS2500

Other versions of this model

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Questions about this item

Is the 16GB kit the only capacity offered for the Synology FS2500?

The listing shows a single 16GB kit made up of two 8GB modules; no other capacities are mentioned for this model.

Will the DDR4 2666 CL19 rating run at that speed inside the FS2500?

The modules are rated at 2666MHz with CL19 latency; the FS2500 will operate them at the platform's supported DDR4 speed.

Does the 288-pin ECC UDIMM work with the FS2500's memory slots?

Yes, the kit uses 288-pin DDR4 ECC unbuffered DIMMs, which match the FS2500's memory slot specification.

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