Synology DiskStation DS1821+

Best RAM for Synology DiskStation DS1821+


The Synology DiskStation DS1821+ is a brilliant expansive NAS. It has eight drive bays for those with big data demands, an AMD Ryzen processor, and support for up to 32GB of RAM. Here’s our list of the best RAM for Synology DiskStation DS1821+.

What RAM is supported by Synology DiskStation DS1821+?

The processor inside the Synology DiskStation DS1821+ is the mighty AMD Ryzen V1500B. It’s a very capable CPU with four physical cores and a top boost speed of 2.2GHz. Not bad for a chip that sucks up to 25W of power.

AMD states the processor is capable of supporting DDR4 RAM up to 2400MT/s, although like many processors, you can run memory at higher speeds. The DS1821+ has a maximum capacity of 32GB. Synology offers official RAM for the DiskStation DS1821+:

Using official RAM is great for maintaining support from Synology. The company is less likely to help with issues that end up being related to unofficial memory modules, but you will be paying a premium for branded hardware.

Best RAM for Synology DiskStation DS1821+

Synology D4ECSO-2666-16G
Synology D4ECSO-2666-16G. (Source: Synology)

Synology D4ECSO-2666-16G

Synology offers its official RAM modules for branded NAS enclosures. They’re expensive but you will have peace of mind and full support from the company should an issue arise down the line. This kit would double the available memory of the DS1621xs+.

Samsung DDR4-2666 16GB
Samsung DDR4-2666 16GB. (Source: NAS Master)

Samsung DDR4-2666 16GB

This unofficial Samsung DDR4 SODIMM module matches the Synology RAM stick almost identically. It has a capacity of 16GB, and a speed of 2666MT/s, but is substantially cheaper. You just lose the official support from Synology.

How to install RAM in Synology DiskStation DS1821+

Installing RAM inside the Synology DiskStation DS1821+ is not a difficult task. The modules aren’t located inside the NAS enclosure, but rather have their own dedicated hatch located underneath the main chassis. Here’s how to quickly install RAM:

  1. Remove the drive bays.
  2. Flip the NAS over.
  3. Unscrew the RAM module hatch door.
  4. Open the hatch door.
  5. Remove the existing DDR4 module if replacing it with a dual kit.
  6. Install your newly purchased RAM modules in the available slot(s).
  7. Close and secure the hatch door.
  8. Boot up the Synology DiskStation DS1621+.
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