Best RAM Upgrade for the Synology DS1525+ (2026)

Best RAM picks for the DS1525+

Three sensible tiers depending on budget and how much headroom you want.

Which should you pick

Why RAM matters more than clock speed here

The DS1525+ uses an AMD Ryzen V1500B quad-core processor, a capable chip for a five-bay NAS but not one built for hardware video transcoding. DSM will use extra RAM for file system caching, Docker containers, and background services like indexing and antivirus scans far more effectively than it will benefit from a few hundred extra megahertz on the memory itself. This is why matching capacity to your workload beats hunting for the fastest SO-DIMM on the shelf.

With two SO-DIMM slots and a 32GB ceiling, the practical upgrade path is either adding a second 8GB module to the stock stick for 16GB total, or replacing both with matched 8GB or 16GB pairs to hit 32GB. Since Synology's ECC support on this model is limited to the specific DDR4 modules it validates, sticking with well-known SO-DIMM brands at compatible speeds (2400 to 3200MHz) is the safer route rather than assuming any laptop RAM will be accepted without complaint.

A word on transcoding