Best RAM Upgrade for Synology DS925+ (2026 Guide)

RAM picks for the DS925+

Three sensible ways to reach or approach the 32GB ceiling, depending on budget and how many slots you want to fill.

Which should you pick

Why RAM matters here, and where it does not

The DS925+ ships with 4GB of DDR4 ECC memory soldered or fitted as a single SO-DIMM, expandable to 32GB across its two slots. Extra memory feeds Synology's file caching, so repeated reads of the same files get faster, and it gives DSM more headroom when several packages are active at once, such as Hyper Backup running alongside Synology Drive sync and an active SMB session or two.

What extra RAM will not do is unlock hardware video transcoding. The AMD Ryzen V1500B in this NAS handles transcoding in software only, and Synology's own documentation does not list reliable real-time hardware transcode support for this chip in Plex or Jellyfin. If you need a NAS that transcodes 4K video on the fly for multiple devices, look at a model with Intel Quick Sync instead. For the DS925+, plan on direct play to compatible devices, or transcode sparingly and expect it to lean on the CPU rather than dedicated hardware.

Where memory does pay off is with the two M.2 NVMe slots. These can be used as a read or read-write cache pool, and a well-cached workload benefits from more system RAM to manage that cache metadata, particularly if you have several active users or a busy SMB share.

A word on compatibility