Side-by-side specifications of the Synology RS815 and RS816, from official datasheets. Differences are highlighted.
| RS815 | RS816 | |
| CPU | Intel Atom C2538 | Marvell ARMADA 385 88F6820 1.8GHz |
| Cores / threads | 4 | 2 cores |
| RAM (base) | 1 GB | 1GB DDR3 |
| RAM (max) | 1 GB | 1GB |
| Drive bays | 4 | 4 |
| Expandable to | 8 | 4 via RX415 |
| M.2 slots | 0 | 0 |
| Network | 2x Gigabit | 2x Gigabit RJ-45 |
| 10GbE | no | no |
| Max raw capacity | 32 TB | 56TB |
| Hot-swap | yes | yes |
| Form factor | 1U rackmount | 1U rackmount |
| Released | 2014 | 2016 |