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

OWC

OWC 16GB (2x8GB) DDR4 2666MHz ECC SODIMM Memory Upgrade

SKU CH-6NK6-28786

16 GB DDR4 2666 MHz ECC SODIMM kit for Synology DS3617xs and DS3617xsII NAS systems

  • Capacity16GB (2 x 8GB)
  • Type260-Pin DDR4 ECC SODIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes

Capacity 16GB (2 x 8GB)

  • 16GB ECC kit protects data integrity in Synology DS3617xs and DS3617xsII NAS
  • DDR4 2666MHz CL19 modules deliver responsive multitasking for micro servers
  • 2x8GB unbuffered SODIMMs install easily in 260-pin slots
  • 2V JEDEC-standard memory runs cooler with lower power draw
  • Backward compatible with 2400MHz and 2133MHz systems for flexible upgrades

Compatible NAS Upgrade

This kit provides 16GB of DDR4 ECC SODIMM memory in a matched pair of 8GB modules. It is designed specifically for Synology DiskStation DS3617xs and DS3617xsII NAS systems. The modules operate at 2666MHz with CL19 latency and 1.2V voltage. ECC support helps maintain data integrity in always-on storage environments.

Replaces Slower DDR4

The kit upgrades systems currently running at 2133MHz or 2400MHz by running at the higher 2666MHz JEDEC standard. The jump is worth it when the NAS handles heavier multi-user workloads, virtual machines, or large file transfers that benefit from the extra bandwidth. Modules are unbuffered and single-rank for direct compatibility with the supported platforms.

16GB Capacity Headroom

The 16GB total capacity comfortably handles typical NAS duties such as file serving, backup targets, and light virtualization. It runs out when running many simultaneous Docker containers, heavy database workloads, or large-scale media transcoding that demand more memory than the two slots can provide.

Highlights

  • 16GB ECC kit protects data integrity in Synology DS3617xs and DS3617xsII NAS
  • DDR4 2666MHz CL19 modules deliver responsive multitasking for micro servers
  • 2x8GB unbuffered SODIMMs install easily in 260-pin slots
  • 2V JEDEC-standard memory runs cooler with lower power draw
  • Backward compatible with 2400MHz and 2133MHz systems for flexible upgrades

Specifications

BrandOWC
Part Number2C6D41R8016P
Capacity16GB (2 x 8GB)
Type260-Pin DDR4 ECC SODIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredUnbuffered
Rank1Rx8
Heat SpreaderNo
Compatible SystemSynology DiskStationDS3617xs
Synology DiskStationDS3617xsII

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Questions about this item

Will the 260-pin DDR4 SODIMMs fit the memory slots in my Synology DS3617xs or DS3617xsII?

Yes, the kit uses the standard 260-pin DDR4 SODIMM form factor required by both the DS3617xs and DS3617xsII.

Do I need to configure anything in the DSM after inserting the two 8 GB modules, or is it detected automatically?

The NAS detects the ECC unbuffered modules at boot; no manual configuration in DSM is required.

If a module fails years from now, can I replace just one 8 GB stick or must I swap the pair?

Each 8 GB module is individually warranted, so a single stick can be replaced without returning the matched pair.

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