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Green rectangular circuit board with gold edge connectors and black memory chips

OWC

OWC 2GB DDR3L 1866 CL13 1Rx8 204-pin 1.35V Non-ECC SODIMM memory upgrade

SKU CH-3VCX-5DSYN

Adds 2 GB of DDR3L 1866 CL13 memory to compatible Synology NAS units including DS218+, DS418play, DS620slim, DS718+ and DS918+ models

  • Total capacity2 GB
  • Rated speedDDR3L 1866 (PC3L 14900)
  • CAS latencyCL13
  • Rated voltage1.35 V
  • Buffer typeUnbuffered
  • Memory rank1Rx8
  • Boosts NAS responsiveness with 2GB DDR3L 1866 CL13 module
  • Low 1.35V operation cuts power draw and heat
  • Fits DS218+, DS418play, DS620slim, DS718+, DS918+
  • JEDEC and RoHS compliant for warranty-safe upgrade
  • Simple DIY install with 204-pin SODIMM form factor

Compatible NAS Memory Upgrade

This OWC module adds 2 GB of DDR3L memory to Synology NAS models DS218+, DS418play, DS620slim, DS718+ and DS918+. It is a single 204-pin SODIMM rated at 1866 MHz with CL13 latency and 1.35 V operation. The unbuffered, non-ECC design matches the factory specification for these systems.

Suitable For Single-Slot Expansion

Owners of the listed Synology units who need a modest capacity increase will find this upgrade straightforward to install. Builders requiring higher densities, dual-rank modules or ECC error correction should look elsewhere, as this stick provides only 2 GB in a single-rank 1Rx8 configuration.

1Rx8 Rank And 1.35 V Voltage

The module uses a 1Rx8 organisation and runs at the DDR3L standard voltage of 1.35 V. A system that demands a different rank structure or a 1.5 V DDR3 module will not accept this part, making those two specifications the decisive compatibility check.

How it compares

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

Price $18.99
Cheaper than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 2 GB
Lower than about 95% of the 20,941 comparable items (median 32 GB).
Price per GB $9.50 per GB
Typical for this category: the median of 20,941 items is $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 number1S8T31R802 GB
Total capacity2 GB
Product type204-Pin DDR3L Non-ECC SODIMM
Performance
Rated speedDDR3L 1866 (PC3L 14900)
Memory
CAS latencyCL13
ECC supportNo
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.35 V
Compatibility
Compatible systemsSynology NAS DS218+
Synology NAS DS418play
Synology NAS DS620slim
Synology NAS DS718+
Synology NAS DS918+

Other versions of this model

5 more in the same range

Questions about this item

Does the module ship alone or with any extra hardware?

The package contains a single 2GB DDR3L 1866 SODIMM; no tools, cables or additional modules are included.

My NAS has two slots — should I add one 2GB stick or two?

Each stick is 2GB; adding one raises capacity by 2GB while adding two doubles that increase to 4GB total.

What does the 1866 speed rating actually deliver in a Synology DS918+?

The module runs at 1866 MT/s with CL13 latency at 1.35V, matching the JEDEC PC3L-14900 spec the NAS expects.

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