Side-by-side specifications of the Synology DS1517 and DS1522+, from official datasheets. Differences are highlighted.
| DS1517 | DS1522+ | |
| CPU | Annapurna Labs Alpine AL-314 1.7GHz | AMD Ryzen R1600 2.6 GHz, up to 3.1 GHz |
| Cores / threads | 4 cores / 4 threads | 2 cores / 4 threads |
| RAM (base) | 2 GB DDR3L | 8 GB DDR4 ECC SODIMM |
| RAM (max) | 2 GB | 32 GB |
| Drive bays | 5 | 5 |
| Expandable to | 10 (2× DX517) | 10 |
| M.2 slots | 0 | 2 M.2 2280 NVMe |
| Network | 4× 1GbE RJ-45 | 4 x 1GbE RJ-45 |
| 10GbE | no | optional |
| Max raw capacity | 75 TB | 15 drives |
| Hot-swap | yes | yes |
| Form factor | Desktop | Desktop |
| Released | 2017 | 2021 |
| Power consumption | 39.5 W / null | 52.06 W / 16.71 W |
| DSM at launch | — | — |