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Green circuit board with black memory chips and gold edge connector

Computer Memory Solutions

Computer Memory Solutions CM5126412800SOSRL 4GB DDR3L 1600 CL11 SO-DIMM memory upgrade

SKU CH-DQBD-XP704

4 GB DDR3L 1600 CL11 SO-DIMM upgrade for Synology DiskStation DS218+, 1.35 V unbuffered non-ECC

  • Total capacity4 GB
  • Rated speedDDR3L 1600 (PC3L 12800)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL11
  • Memory timings11-11-11
  • Rated voltage1.35 V
  • Boosts NAS responsiveness with 4 GB DDR3L 1600 MHz memory
  • Low 1.35 V DDR3L voltage reduces power draw and heat
  • CL11 11-11-11 timing delivers snappy data access
  • 204-pin SO-DIMM form factor fits Synology DiskStation DS218+ slot
  • Single 4 GB module enables easy capacity expansion

Synology DS218+ memory upgrade

This 4 GB DDR3L SO-DIMM is built for the Synology DiskStation DS218+ and runs at 1600 MHz with CL11 timing. The module uses a 204-pin form factor, operates at 1.35 V and is unbuffered non-ECC with a single 1Rx8 rank. Computer Memory Solutions validates compatibility for this specific NAS model.

Suitable for DS218+ capacity expansion

The stick fits one of the two available slots and adds 4 GB to the system, working toward the 16 GB maximum the platform supports. It is not for users who need ECC error correction, registered modules or a higher-speed grade than DDR3L 1600. Buyers with other NAS models or desktop boards should verify their own requirements first.

4 GB module toward 16 GB limit

One module provides 4 GB of usable memory and the platform can accept up to 16 GB across its two sockets. Performance scales with total capacity for multi-user file services and container workloads. Headroom ends when both slots are filled, so further expansion requires replacing this stick with higher-density modules.

How it compares

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

Price $20.99
Cheaper than about 90% 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 $5.25 per GB
Cheaper than about 73% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM5126412800SOSRL
Total capacity4 GB
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3L 1600 (PC3L 12800)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL11
Memory timings11-11-11
ECC supportNo
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.35 V
Compatibility
Compatible systemsSynology DiskStation DS218+
In the box
Included items1Memory Ram Stick

Questions about this item

Do I need a free 204-pin SO-DIMM slot in my Synology DiskStation DS218+ to install this module?

Yes, the DS218+ has two SO-DIMM sockets and this stick occupies one of them.

Can I keep my existing DDR3L 1600 CL11 memory and add this 4GB stick alongside it?

Yes, both run at 1.35V with 11-11-11 timing so they will operate together at the same speed.

How can I confirm the DS218+ recognises the full 4GB after installation?

Open Storage Manager in DSM and verify the total system memory now shows the additional 4GB.

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