Side-by-side specifications of the Synology DS409 and DS419SLIM, from official datasheets. Differences are highlighted.
| DS409 | DS419SLIM | |
| CPU | 1.2GHz | Marvell Armada 385 88F6820 |
| Cores / threads | — | 2-core |
| RAM (base) | 256MB | 512 MB |
| RAM (max) | — | 512 MB |
| Drive bays | 4 | 4 |
| Expandable to | — | 0 |
| M.2 slots | 0 | 0 |
| Network | 1x Gigabit | 2x 1GbE RJ-45 |
| 10GbE | no | no |
| Max raw capacity | 4TB | 20 TB |
| Hot-swap | yes | yes |
| Form factor | desktop | mini cube |
| Released | 2009 | 2019 |