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Green rectangular circuit board with gold edge connectors and black memory chips, no heat spreader

NEMIX RAM

NEMIX RAM 16GB DDR4 2666 PC4-21300 CL19 2Rx8 1.2V 288-pin ECC RDIMM server RAM

SKU CH-S60B-MCQ25

16 GB DDR4 2666 ECC RDIMM module with CL19 latency, 1.2 V operation and 2Rx8 registered design for server stability

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • 16 GB capacity expands server memory headroom
  • DDR4 2666 speed delivers responsive data throughput
  • CL19 latency with 1.2 V operation balances performance and efficiency
  • ECC registered design protects data integrity under load
  • 288-pin RDIMM form factor fits compatible QNAP NAS slots

QNAP NAS 16 GB DDR4 ECC RDIMM

This 16 GB DDR4 2666 MHz registered DIMM adds error-correcting memory to compatible QNAP NAS devices. It targets IT professionals who need data-integrity protection for mission-critical storage workloads. The module is built with major OEM DRAM and validated for server-grade reliability.

Capacity and headroom

A single 16 GB rank of 2Rx8 organisation suits multi-user file serving, virtualisation hosts and backup targets that benefit from ECC. Workloads that exceed this capacity will require additional DIMM slots or higher-density modules. The CL19 latency and PC4-21300 bandwidth match the platform's native memory controller limits.

Thermals and power

Operating at 1.20 V without a heat spreader, the module runs cool inside typical NAS chassis airflow. Registered buffering reduces electrical load on the memory bus, helping system stability during sustained write-heavy tasks. Power draw remains low enough for dense multi-DIMM configurations without supplemental cooling.

How it compares

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

Price $94.99
Cheaper than about 71% 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 $5.94 per GB
Cheaper than about 64% 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 numberMR21300-628K1
Total capacity16 GB
Product type288-Pin DDR4 RDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V

Questions about this item

Will this 2666 MHz CL19 RDIMM run alongside existing DDR4 modules in a server?

It is a DDR4 2666 PC4-21300 CL19 1.2V ECC registered module. The system will clock all installed memory to the lowest common speed and timing.

How can I verify the 16GB 2Rx8 ECC RDIMM is detected correctly after installation?

Check the BIOS or UEFI memory information screen for 16 GB total capacity, 2666 MT/s speed, ECC active, and registered mode reported.

Does the box include only the MR21300-628K1 module or are heat spreaders and cables supplied?

The package contains the single 288-pin DDR4 RDIMM. No heat spreader, cables, or additional accessories are included.

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