Side-by-side specifications of the Synology DS213+ and DS409, from official datasheets. Differences are highlighted.
| DS213+ | DS409 | |
| CPU | Marvell Armada XP MV78230 dual-core 1.0 GHz | 1.2 GHz |
| Cores / threads | 2 cores / 2 threads | 1 core / 1 thread |
| RAM (base) | 512 MB DDR3 | 256 MB |
| RAM (max) | 512 MB | 256 MB |
| Drive bays | 2 | 4 |
| Expandable to | 0 | 0 |
| M.2 slots | 0 | 0 |
| Network | 1× Gigabit Ethernet | 1× Gigabit Ethernet |
| 10GbE | no | no |
| Max raw capacity | 8 TB (2×4 TB) | 4 TB |
| Hot-swap | yes | no |
| Form factor | tower | Tower |
| Released | 2013 | 2009 |
| Power consumption | 18.4 W / 2.6 W | 42.9 W / 16 W |
| DSM at launch | 4.2 | 2.2 |