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

OWC

OWC 32GB (2x16GB) DDR4 2666MHz CL19 ECC SODIMM for Synology DS1618+

SKU CH-MT1M-91MXM

32 GB DDR4 ECC SODIMM kit (2 × 16 GB) at 2666 MHz CL19, validated for Synology DS1618+ NAS upgrades

  • Capacity32GB (2 x 16GB)
  • Type260-Pin DDR4 ECC SODIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes

Capacity 32GB (2 x 16GB)

  • 32GB kit expands Synology DS1618+ capacity for heavier workloads
  • DDR4 2666MHz CL19 matches system speed for stable operation
  • ECC protection detects and corrects single-bit errors automatically
  • 2V low-voltage modules reduce power draw and heat
  • JEDEC-standard 260-pin SODIMMs install without tools or configuration

Synology DS1618+ 32GB DDR4 ECC kit

This 32GB kit contains two 16GB DDR4 2666MHz CL19 ECC SODIMM modules built for the Synology DiskStation DS1618+. The unbuffered 2Rx8 design runs at 1.2V and meets JEDEC PC4-21300 specifications. It is intended for NAS owners who need more memory for virtual machines, container workloads or heavy file-service caching.

Upgrade from 8GB or 16GB factory configurations

The DS1618+ ships with 8GB or 16GB of non-ECC memory depending on the original bundle. Adding this kit replaces the original sticks and raises the total to 32GB, the maximum the platform officially supports. The jump is worthwhile when the NAS runs Docker containers, hosts multiple VMs or serves many concurrent SMB connections that exhaust the stock capacity.

Sustained load behaviour with ECC protection

Under continuous workloads the modules operate at the rated 2666MHz CL19 without downclocking, and ECC corrects single-bit errors that can accumulate during long uptime. Backward compatibility with 2400MHz and 2133MHz ensures stable operation if the system negotiates a lower speed. The kit is not suited for platforms that require registered DIMMs or non-ECC memory only.

Highlights

  • 32GB kit expands Synology DS1618+ capacity for heavier workloads
  • DDR4 2666MHz CL19 matches system speed for stable operation
  • ECC protection detects and corrects single-bit errors automatically
  • 2V low-voltage modules reduce power draw and heat
  • JEDEC-standard 260-pin SODIMMs install without tools or configuration

Specifications

BrandOWC
Part Number2C6D42R8032P
Capacity32GB (2 x 16GB)
Type260-Pin DDR4 ECC SODIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredUnbuffered
Rank2Rx8
Heat SpreaderNo
Compatible SystemSynology DiskStationDS1618+

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Questions about this item

Does the 260-pin DDR4 SODIMM form factor fit the Synology DS1618+ memory slots?

Yes, the kit uses 260-pin DDR4 ECC SODIMM modules, which match the slot type used in the Synology DS1618+.

What is the correct order for seating the two 16GB modules during installation?

Insert each module at a slight angle into the slot, then press down firmly until the side clips click into place on both sides.

Will the ECC function remain active if I later add non-ECC memory to the remaining slots?

Mixing ECC and non-ECC modules typically disables error correction across all channels, so adding non-ECC memory later would turn off the ECC feature.

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