Upgrading the memory on an asustor AS5402T Hard Drive and Flash NAS

The asustor AS5402T is a NAS appliance that supports two (2) 3.5" drives and four (4) NVMe drives.  I wanted to run some Docker and Home Automation on my AS5402T NAS so that I didn't have to maintain additional machines. 

The AS5402T has two SODIMM slots that are accessible without any tools. It comes standard with a single upgradable 4GB SODIMM.  Upgrading from 4GB to 32GB was a simple, toolless operation.

Getting Access

Getting access to the memory slots

  1. Power off the unit.
  2. Unplug the unit from the wall outlet.
  3. Remove the 3.5" disks. Remember which slot each drive was in.
  4. You should be able to see the SODIMM slot by looking in through the disk drive opening.  The memory modules are visible at the bottom.  See the following images

I swapped the RAM and reinserted the drives before powering up.

Original Configuration

The unit accepts DDR3 3200MHz SODIMM. 


Two CRUCIAL 16GB DDR3 1600 SODIMM

The RAM modules cost me about $45 each with tax.  I only really needed 16GB. The local Microcenter tempted me with piles of available modules, and I fell for it.




Memory at idle

After the upgrade...



Revision History

Created 2025/09

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