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Two green DDR4 SODIMM sticks, no heat spreaders, gold contacts, 260-pin

NEMIX RAM

NEMIX RAM 16GB (2x8GB) DDR4 2666MHz CL19 1.2V ECC SODIMM for Synology RS822+

SKU CH-DYS3-5A3YP

ECC DDR4 SODIMM kit adds 16 GB at 2666 MHz CL19 for Synology RS822+ 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 on Synology RS822+
  • 16 GB kit (2 × 8 GB) expands NAS capacity
  • DDR4 2666 MHz CL19 matches system spec
  • 2 V low-voltage modules reduce power draw
  • 260-pin SODIMM form factor fits RS822+ slots

Synology RS822+ DDR4 ECC SODIMM Kit

This 16 GB kit contains two 8 GB DDR4 2666 MHz ECC unbuffered SODIMM modules built for the Synology RS822+ NAS. It runs at 1.20 V with CL19 latency and uses a 260-pin form factor. The memory targets IT professionals who need validated ECC reliability for mission-critical storage workloads.

2x8 GB Matched Pair With ECC Validation

The paired modules are stress-tested together to ensure stable dual-channel operation inside the RS822+. ECC circuitry detects and corrects single-bit errors, protecting data integrity during intensive file serving or backup tasks. No heat spreaders are included, keeping the low-profile SODIMM height compatible with the NAS chassis.

DDR4 2666 SODIMM Interface Constraints

The 260-pin DDR4 SODIMM slot limits upgrades to unbuffered ECC modules at this speed and voltage. Higher-frequency or registered DIMMs will not function in the RS822+ memory controller. Builders needing more than 16 GB total capacity cannot use this kit alone.

How it compares

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

Price $109.99
Cheaper than about 66% 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 $6.87 per GB
Cheaper than about 58% of the 20,941 comparable items (median $8.19 per GB).

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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

Will the ECC SODIMM modules need replacement after a certain number of write cycles?

ECC DRAM does not wear out from write cycles; the modules only require replacement if a hardware fault develops.

What is the first limit reached when the kit runs at 2666MHz CL19 continuously?

The CAS latency of CL19 sets the timing ceiling; sustained throughput cannot exceed the DDR4 2666 bus rate.

How much heat and power does the 1.2V kit produce during all-day NAS operation?

At 1.20V with no heat spreader the modules run cool and draw minimal power, so fan noise stays low in the RS822+.

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