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Green circuit board with black memory chips, gold edge connector, no heat spreader

Computer Memory Solutions

Computer Memory Solutions 16GB DDR4 2400 ECC Non-Registered DIMM Synology RS3618xs

SKU CH-XXG8-KSQXN

Adds 16 GB of ECC DDR4-2400 memory to a Synology RS3618xs in a single unregistered DIMM

  • Total capacity16 GB
  • Rated speedDDR4 2400 (PC4 19200)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL17
  • Memory timings17-17-17
  • Rated voltage1.2 V
  • 16 GB DDR4-2400 ECC memory expands Synology RS3618xs capacity
  • CL17 timing at 1.2 V delivers stable bandwidth for NAS workloads
  • Unregistered 288-pin DIMM installs directly without extra hardware
  • 2Rx8 dual-rank organisation fills one of four slots efficiently
  • CMS lifetime warranty backs compatibility with Synology RackStation systems

Synology RS3618xs Memory Upgrade

This 16 GB DDR4 module is built for the Synology RackStation RS3618xs. It adds capacity to a NAS that supports up to 64 GB across four slots. The unregistered ECC design matches the system's requirements for data integrity. Buyers needing registered DIMMs or a different pin count cannot use this kit.

Sustained Load Behaviour

ECC circuitry corrects single-bit errors during continuous read and write cycles. The CL17 timing and 1.2 V operation keep latency stable under long workloads. No heat spreader is fitted, so airflow in the chassis manages module temperature. Systems that demand registered buffers or higher voltage modules will not accept this part.

Deciding Specification

The module runs at DDR4 2400 (PC4 19200) with a 2Rx8 organisation. This speed and rank configuration must match the motherboard's qualified vendor list. A different frequency, rank layout or voltage will prevent the NAS from booting.

How it compares

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

Price $71.99
Cheaper than about 72% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $4.50 per GB
Cheaper than about 81% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM2048722400ECCNR
Total capacity16 GB
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2400 (PC4 19200)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL17
Memory timings17-17-17
ECC supportYes
Buffer typeUnregistered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology RackStation RS3618xs
In the box
Included items1Memory Ram Stick

Questions about this item

How much power does the 1.2V DDR4 2400 module draw under continuous load?

The module operates at 1.2 volts and is rated DDR4 2400 (PC4 19200) with CL17 timings; actual power draw depends on the Synology RS3618xs memory controller and workload.

Does the RS3618xs require any specific BIOS setting or firmware version to recognise this ECC unregistered DIMM?

The stick is validated for the Synology RackStation RS3618xs and RS4017xs+; the NAS firmware handles ECC unregistered memory automatically with no extra configuration.

Can I mix this 2Rx8 16GB stick with the original 8GB modules in the four RS3618xs slots?

The RS3618xs supports up to 64GB across four slots; mixing ranks is allowed but all slots run at the speed of the slowest module, so the 2400MHz stick will down-clock if existing memory is slower.

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