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Two green DDR4 SODIMM sticks side by side, no heat spreaders

NEMIX RAM

NEMIX RAM 16GB (2x8GB) DDR4 2666 ECC SODIMM Kit DS1823xs+ memory upgrade

SKU CH-KHRJ-0XYS4

16 GB DDR4 2666 ECC SODIMM kit adds error-correcting memory to Synology DS1823xs+ NAS

  • Total capacity16 GB (2 × 8 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • ECC protection guards data integrity with built-in error correction
  • 2666 MT/s DDR4 speed matches DS1823xs+ controller specification
  • Dual 8 GB modules enable dual-channel bandwidth
  • 20 V low voltage reduces NAS power draw
  • 260-pin SODIMM form factor fits Synology RackStation slots

Synology DS1823xs+ DDR4 ECC SODIMM kit

This 16 GB kit contains two 8 GB DDR4 2666 ECC unbuffered SODIMM modules built for the Synology RackStation DS1823xs+. Each stick runs at 1.2 V with CL19 latency and uses a 260-pin layout. The memory is validated for NAS workloads that require error-correcting code reliability.

Suited for DS1823xs+ owners adding capacity.

The kit targets administrators expanding a DS1823xs+ beyond its factory configuration. Systems that cannot accept ECC unbuffered SODIMMs, or laptops and desktops requiring standard non-ECC memory, will not work with these modules. Buyers needing higher frequencies or lower latencies should look at other solutions.

Verify slot count, maximum capacity

Confirm the DS1823xs+ has free SODIMM slots and that the total installed memory will not exceed the platform limit. Check Synology’s hardware compatibility list and current DSM firmware for any population rules or rank restrictions before installing the 1Rx8 modules.

How it compares

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

Price $108.99
Cheaper than about 67% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB (2 × 8 GB)
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $6.81 per GB
Cheaper than about 58% of the 20,941 comparable items (median $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 nameNEMIX RAM
Product lineSynology Compatible Series NAS Memory
Model nameSynology DDR4 2666 MHz ECC Unbuffered SODIMM
Part numberMSE21300-818K2
Total capacity16 GB (2 × 8 GB)
Product type260-PIN DDR4 ECC SODIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Heat spreaderNo
Memory rank1Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology
In the box
Included items16 GB (2 × 8 GB) DDR4 2666 MHz PC4-21300 1Rx8 1.2 V CL19 260-PIN ECC Unbuffered SODIMM KIT

Questions about this item

Does my Synology DS1823xs+ need to support DDR4 2666 ECC SODIMM modules for this kit to work?

Yes, the DS1823xs+ must accept DDR4 2666 ECC unbuffered SODIMMs at 1.2 V with a CAS latency of CL19 and 260-pin layout.

Will this 1Rx8 ECC kit run correctly if I leave an older non-ECC DDR4 SODIMM in the second slot?

Mixing ECC and non-ECC modules is not supported; the NAS will disable ECC or fail to boot, so all slots should use matching ECC SODIMMs.

How can I verify the kit is running at 2666 MT/s with ECC active after installation?

In DSM open Resource Monitor → Memory; it should show 16 GB at 2666 MHz and report ECC as enabled or corrected errors counted.

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