Side-by-side specifications of the Synology DS1515 and DS1522+, from official datasheets. Differences are highlighted.
| DS1515 | DS1522+ | |
| CPU | Annapurna Labs Alpine AL-514 | 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 | 8 GB DDR4 ECC SODIMM |
| RAM (max) | 2 GB | 32 GB |
| Drive bays | 5 | 5 |
| Expandable to | 15 | 10 |
| M.2 slots | 0 | 2 M.2 2280 NVMe |
| Network | 4 x 1GbE | 4 x 1GbE RJ-45 |
| 10GbE | no | optional |
| Max raw capacity | 40 TB | 15 drives |
| Hot-swap | yes | yes |
| Form factor | Desktop | Desktop |
| Released | 2015 | 2021 |
| Power consumption | — | 52.06 W / 16.71 W |
| DSM at launch | — | — |