Side-by-side specifications of the Synology DS212j and DS213+, from official datasheets. Differences are highlighted.
| DS212j | DS213+ | |
| CPU | — | Marvell Armada XP MV78230 dual-core 1.0 GHz |
| Cores / threads | — | 2 cores / 2 threads |
| RAM (base) | — | 512 MB DDR3 |
| RAM (max) | — | 512 MB |
| Drive bays | 2 | 2 |
| Expandable to | 0 | 0 |
| M.2 slots | 0 | 0 |
| Network | 1× Gigabit | 1× Gigabit Ethernet |
| 10GbE | no | no |
| Max raw capacity | 6 TB | 8 TB (2×4 TB) |
| Hot-swap | no | yes |
| Form factor | desktop | tower |
| Released | 2011 | 2013 |
| Power consumption | 17.6 W / null | 18.4 W / 2.6 W |
| DSM at launch | — | 4.2 |