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Green 204-pin DDR3L SODIMM module with black chips

Timetec

Timetec DDR3-1866L 4GB SODIMM 1.35V CL13 1Rx8 memory upgrade

SKU CH-JACF-Z6JM6

A 4 GB DDR3L SODIMM running at 1866 MHz with CL13 latency and 1.35 V for Synology DS620slim, DS218+, DS718+, DS918+ and DS418play

  • Capacity4GB
  • SpeedDDR3 1866 (PC3 14900)

Speed DDR3 1866 (PC3 14900)

  • Drop-in replacement for Synology D3NS1866L-4G module
  • Validated for DS620slim, DS218+, DS718+, DS918+, DS418play
  • DDR3L 1866 MHz PC3L-14900 runs at low 1.35 V
  • 204-pin SODIMM fits 18-series and 20-series DiskStations
  • Single-rank 1Rx8 512 x 8 organisation for broad compatibility

Timetec DDR3L 4GB SODIMM for Synology NAS

This Timetec module is a 4GB DDR3L SODIMM designed to replace the Synology D3NS1866L-4G stick. It runs at 1866MHz with a CAS latency of 13 at 1.35V. The unbuffered, non-ECC design targets owners of compatible DiskStation units who need a straightforward capacity refresh.

Sustained operation in DiskStation 18 and 20 series

The single-rank 1Rx8 organisation based on 512x8 chips keeps electrical loading light during continuous file serving or backup workloads. Low-voltage DDR3L operation at 1.35V reduces heat output inside the compact chassis, helping the module maintain its rated speed without throttling during long uptime periods.

Direct replacement for Synology D3NS1866L-4G

This part matches the original 204-pin form factor, voltage and timing so the NAS recognises it without configuration changes. The upgrade is worthwhile when a factory-installed module has failed or when a single-slot bay needs its maximum supported density. Builders needing ECC, registered DIMMs or capacities beyond 4GB per slot cannot use this module.

Highlights

  • Drop-in replacement for Synology D3NS1866L-4G module
  • Validated for DS620slim, DS218+, DS718+, DS918+, DS418play
  • DDR3L 1866 MHz PC3L-14900 runs at low 1.35 V
  • 204-pin SODIMM fits 18-series and 20-series DiskStations
  • Single-rank 1Rx8 512 x 8 organisation for broad compatibility

Specifications

Capacity4GB
SpeedDDR3 1866 (PC3 14900)

Other versions of this model

1 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

How much heat does a DDR3L 1.35 V SODIMM add during continuous NAS operation?

The module runs at 1.35 V, lower than standard DDR3, so it generates less heat inside the sealed chassis of a DiskStation 18 or 20 series unit.

What must the NAS already have for this 204-pin DDR3L SODIMM to install?

An empty SO-DIMM slot that accepts DDR3L 1866 MHz PC3L-14900 memory; the supported models are DS218+, DS418play, DS718+, DS918+ and DS620slim.

Will this CL13 1Rx8 stick work beside the original Synology D3NS1866L-4G module?

Yes, it is a direct replacement with identical speed, voltage, rank and timing, so it pairs without mismatch in the compatible DiskStation models.

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