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Green circuit board with black memory chips, no heat spreader, 288 gold pins along the bottom edge

NEMIX RAM

NEMIX RAM 16GB DDR4 2666 PC4-21300 CL19 1.2V 288-Pin ECC UDIMM 2Rx8 QNAP NAS

SKU CH-K3YM-V28E2

16GB DDR4 2666 ECC UDIMM module with CL19 latency and 1.2V operation for QNAP NAS upgrades

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • 16GB DDR4 ECC UDIMM protects data integrity
  • 2666MHz PC4-21300 speed handles demanding workloads
  • CL19 1.2V operation balances performance and efficiency
  • 2Rx8 288-pin layout fits compatible QNAP NAS
  • Major OEM chips ensure reliable server-grade stability

16GB DDR4 ECC UDIMM for QNAP NAS

This 16GB DDR4-2666 ECC UDIMM module is built for QNAP NAS devices that require 288-pin unbuffered memory with error correction. It operates at 1.20V with CL19 latency and a 2Rx8 organisation. The stick uses major OEM chips from Samsung, Micron or Hynix and carries no heat spreader.

Sustained workload stability

All modules are rigorously stress tested under load to ensure reliability during continuous operation in mission-critical environments. The ECC function detects and corrects single-bit errors on the fly, preventing silent data corruption during long file transfers, backups or virtualisation tasks. Unbuffered design keeps latency low for responsive NAS services.

Compatibility checks before ordering

Verify that your QNAP model accepts 16GB DDR4-2666 ECC UDIMM modules in a 2Rx8 configuration at 1.20V. Confirm the motherboard has a free 288-pin slot and supports unbuffered ECC memory rather than registered or non-ECC types. Check the maximum supported capacity per slot and total system limit in the owner's manual. Ensure the BIOS or firmware is current for proper memory training.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $141.99
Cheaper than about 57% of the 6,523 comparable items (median $188.99).
Total capacity 16 GB
Lower than about 60% of the 6,064 comparable items (median 32 GB).
Price per GB $8.87 per GB
Pricier than about 62% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineQNAP NAS Device Memory
Model nameQNAP NAS Memory
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
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V

Questions about this item

Does the 1.2V DDR4 2666 module run hot or noisy in a QNAP NAS under continuous load?

The module operates at 1.20V without a heat spreader and has no moving parts, so it adds no audible noise and minimal thermal load.

What must my QNAP NAS already support for this 288-pin ECC UDIMM to work?

The NAS needs DDR4 slots that accept 288-pin unbuffered ECC UDIMMs at 2666 MT/s and a memory controller capable of 2Rx8 organisation.

Will this CL19 2Rx8 stick work alongside my existing DDR4 2666 memory in the same QNAP?

Yes, if the existing modules are also DDR4 2666 ECC unbuffered UDIMMs; matching speed, voltage and ECC type lets the system run in multi-channel mode.

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