Side-by-side specifications of the Synology FS3017 and FS3420, from official datasheets. Differences are highlighted.
| FS3017 | FS3420 | |
| CPU | 2x Intel Xeon 6-core | Intel Xeon D-1739 |
| Cores / threads | 12 cores/24 threads | 8/16 |
| RAM (base) | 64 GB | 32 GB |
| RAM (max) | 512 GB | 192 GB |
| Drive bays | 24 | 24 |
| Expandable to | 72 | — |
| M.2 slots | null | — |
| Network | 2x 10GbE RJ45 | 2x 10GbE RJ-45 |
| 10GbE | yes | yes |
| Max raw capacity | 108 TB | 1 PB |
| Hot-swap | yes | yes |
| Form factor | Desktop | 2U rackmount |
| Released | 2017 | 2026 |