Side-by-side specifications of the Synology DS1522+ and DS925+, from official datasheets. Differences are highlighted.
| DS1522+ | DS925+ | |
| CPU | AMD Ryzen R1600 | AMD Ryzen V1500B |
| Cores / threads | 2/4 | 4/8 |
| RAM (base) | 8 GB | 4 GB |
| RAM (max) | 32 GB | 32 GB |
| Drive bays | 5 | 4 |
| Expandable to | 10 | 9 |
| M.2 slots | 2 | 2 |
| Network | 4x 1GbE | 2x 2.5GbE |
| 10GbE | optional | no |
| Max raw capacity | 15 drives | 180 TB |
| Hot-swap | yes | yes |
| Form factor | desktop | desktop |
| Released | 2022 | 2025 |
Choose the DS925+ if you want the newer CPU and built-in 10GbE plus M.2 support, but note its RAM ceiling is lower and it has only 4 bays. Choose the DS1522+ if you need more storage growth: it has 5 bays and expansion support, but you give up the newer CPU and built-in 10GbE/M.2 on the base spec.