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Green circuit board with black memory chips and gold edge connector

NEMIX RAM

NEMIX RAM 16GB DDR4 2666 ECC UDIMM CL19 1.2V 288-Pin Synology Memory Upgrade

SKU CH-P9GJ-9DN43

A 16 GB DDR4 ECC UDIMM running at 2666 MHz with CL19 latency and 1.2 V for Synology NAS upgrades

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • 16 GB DDR4 2666 MHz expands NAS capacity
  • ECC UDIMM protects data integrity in Synology systems
  • CL19 latency with 1.2 V keeps power draw low
  • 288-pin unbuffered design fits compatible Synology bays
  • Built with Samsung Micron Hynix chips for reliability

16GB DDR4 ECC UDIMM for Synology NAS

This module provides 16GB of DDR4 2666 memory with ECC error correction. It is built for Synology NAS systems that accept unbuffered UDIMMs. The single 2Rx8 rank design fits compatible bays directly.

DDR4 2666 speed and unbuffered design

The PC4-21300 standard sets the maximum data rate at 2666 MT/s. ECC functionality requires a motherboard that supports error-correcting unbuffered memory; systems without ECC support will not use the parity bits. Voltage is fixed at 1.2V.

Tool-free installation in compatible bays

The 288-pin UDIMM slots into the NAS memory socket without screws or cables. Alignment notches prevent backward insertion. Systems that require registered or load-reduced DIMMs will not accept this unbuffered module.

How it compares

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

Price $133.99
Cheaper than about 64% 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 $8.37 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 nameNEMIX RAM
Product lineSynology Compatible Series NAS Memory
Model nameSynology DDR4 2666 MHz ECC Unbuffered UDIMM
Part numberME21300-628K1
Total capacity16 GB
Product type288-Pin DDR4 ECC UDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology
In the box
Included items16 GB (1 × 16 GB) DDR4 2666 MHz PC4-21300 2Rx8 1.2 V CL19 288-PIN ECC Unbuffered UDIMM

Questions about this item

Should I choose the 16GB single module or look for a dual-channel kit?

This listing is a single 16GB 2Rx8 DDR4 2666 ECC UDIMM; adding a second identical module enables dual-channel bandwidth on supported Synology NAS boards.

What does the 2666 MT/s rating deliver in my Synology NAS?

The module runs at DDR4 2666 (PC4-21300) with CL19 latency, providing the maximum JEDEC speed the NAS memory controller officially supports for ECC unbuffered DIMMs.

Does the 288-pin DDR4 ECC UDIMM interface limit capacity or speed in practice?

The 288-pin DDR4 ECC unbuffered interface caps each DIMM at the JEDEC DDR4 2666 standard; total system capacity depends on the number of slots your Synology model provides.

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