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Two green DDR4 ECC SODIMM sticks, 260-pin, no heat spreader

OWC

OWC 16GB (2x8GB) DDR4 2666 CL19 ECC SODIMM 260-pin 1.2V Synology RS1522+ memory upgrade

SKU CH-H8DJ-H7X5Q

16 GB DDR4-2666 ECC SODIMM kit (2 × 8 GB, CL19, 1.2 V) validated for Synology RS1522+ NAS expansion

  • 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 ECC kit adds capacity for heavier NAS workloads
  • DDR4 2666 CL19 modules run at 1.2 V for efficient operation
  • JEDEC-standard 260-pin SODIMMs ensure warranty-safe compatibility
  • Dual-rank 1Rx8 design fits Synology RS1522+ slots without modification
  • Backward compatible with 2400 MHz and 2133 MHz systems

System-Specific DDR4 ECC SODIMM

This OWC kit supplies 16GB of DDR4 2666 memory in two 8GB modules built to the 260-pin SODIMM form factor. Each stick runs at 1.2V with CL19 latency and includes ECC error correction in an unbuffered 1Rx8 configuration. The set is validated for the Synology DiskStation RS1522+ and meets JEDEC PC4-21300 standards.

Synology RS1522+ owners adding capacity

The modules suit administrators who need to expand the RS1522+ beyond its stock memory for virtual machines, container workloads or large file caches. Buyers whose NAS uses a different slot type, requires registered DIMMs, or operates on a platform that cannot accept ECC unbuffered SODIMMs should look elsewhere.

ECC unbuffered 260-pin SODIMM

The defining specification is the combination of ECC unbuffered operation and the 260-pin SODIMM interface, which together determine whether the kit fits the target chassis and memory controller. Systems that demand registered ECC, non-ECC modules, or a different pin count will not accept these sticks.

How it compares

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

Price $111.99
Cheaper than about 66% 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 $7.00 per GB
Cheaper than about 57% of the 20,941 comparable items (median $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 number2C6D41R8016P
Total capacity16 GB (2 × 8 GB)
Product type260-Pin DDR4 ECC SODIMM
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 DiskStation RS1522+

Other versions of this model

2 more in the same range

Questions about this item

Should I choose the 16GB kit or add a single 8GB module to my RS1522+?

The kit provides two matched 8GB modules for 16GB total, enabling dual-channel operation in the RS1522+ for maximum throughput.

What does the 2666MHz CL19 rating deliver inside a Synology RS1522+?

At 2666MHz with CL19 latency the modules run at the RS1522+ native memory speed, giving low-latency ECC bandwidth for file services and virtualization.

How does the PC4-21300 DDR4 260-pin interface limit performance in this NAS?

The 260-pin DDR4 SODIMM slot in the RS1522+ accepts PC4-21300 modules; speed is capped at 2666MHz and the system will down-clock to 2400MHz or 2133MHz if required.

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