Side-by-side specifications of the Synology RS217 and RS408, from official datasheets. Differences are highlighted.
| RS217 | RS408 | |
| CPU | Marvell ARMADA 385 88F6820 | 800 MHz |
| Cores / threads | 2 cores | — |
| RAM (base) | 512MB | 512 MB |
| RAM (max) | 512MB | — |
| Drive bays | 2 | 4 |
| Expandable to | 0 | — |
| M.2 slots | 0 | 0 |
| Network | 2x 1GbE RJ-45 | 2x Gigabit |
| 10GbE | no | no |
| Max raw capacity | 28TB | 4 TB |
| Hot-swap | yes | yes |
| Form factor | 1U rackmount | 1U rackmount |
| Released | 2017 | 2008 |