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Green rectangular DDR4 RDIMM module with black chips, gold contacts, no heat spreader

NEMIX RAM

NEMIX RAM 32GB DDR4 2666 ECC RDIMM Synology SA6400 memory upgrade

SKU CH-K97A-BK39H

Adds 32 GB of ECC registered DDR4-2666 memory to a Synology SA6400 NAS

  • Total capacity32 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeRegistered
  • Rated voltage1.2 V
  • 32 GB capacity expands Synology SA6400 workload headroom
  • ECC RDIMM registered design protects data integrity under load
  • DDR4 2666 speed matches system memory bus exactly
  • 2 V operation keeps power draw low in dense NAS builds
  • 288-pin 2Rx4 module installs in a single slot

Synology SA6400 DDR4 ECC RDIMM

This 32 GB DDR4 2666 MHz module is built for the Synology SA6400 NAS. It adds registered ECC memory to a system that requires error-correcting registered DIMMs. IT teams use it to expand capacity for virtualization, file services or database workloads on that specific platform.

Tool-free slot installation

The 288-pin RDIMM seats in the SA6400 memory slots without tools. Because the system demands registered ECC modules, a standard unbuffered DIMM will not post. Installers must also match the existing 2666 MHz speed and 1.20 V voltage; mixing different ranks or voltages can prevent boot.

32 GB single-module capacity

The kit supplies one 32 GB stick (1x32 GB) at PC4-21300 CL19 2Rx4. This density decides whether the NAS reaches its maximum supported memory or fills a single empty slot. Buyers needing a different total capacity or a dual-rank kit must choose another part.

How it compares

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

Price $196.99
Cheaper than about 59% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $6.16 per GB
Cheaper than about 64% 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 RDIMM Registered Server Memory
Part numberMR21300-324K1
Total capacity32 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
Heat spreaderNo
Memory rank2Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology
In the box
Included items32 GB (1 × 32 GB) DDR4 2666 MHz PC4-21300 2Rx4 1.2 V CL19 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

How can I confirm the 32GB DDR4 2666 ECC RDIMM is recognised correctly after installing it in my Synology SA6400?

After installation, open the Synology DSM interface and check the System Information or Resource Monitor section; it will display the installed memory capacity, speed and ECC status, confirming the module is detected and operating at 2666MHz with CL19 timings.

What is included in the package and do I need any extra components to install this memory?

The package contains one 32GB 288-pin DDR4 2666MHz PC4-21300 CL19 1.2V ECC registered RDIMM (2Rx4); no additional parts, cables or tools are required for installation in a compatible Synology SA6400 NAS.

Which capacity or version should I choose if I want to expand my SA6400 beyond the single 32GB module?

This part number MR21300-324K1 is a single 32GB module; add additional identical modules to reach the SA6400's supported maximum capacity, ensuring each stick matches the 2666MHz CL19 ECC RDIMM specification.

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