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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

  • Total capacity4 GB
  • Rated 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.

How it compares

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

Price $9.99
Cheaper than about 97% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $2.50 per GB
Cheaper than about 92% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Total capacity4 GB
Performance
Rated speedDDR3 1866 (PC3 14900)

Other versions of this model

1 more in the same range

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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