Side-by-side specifications of the Synology DS211 and DS212j, from official datasheets. Differences are highlighted.
| DS211 | DS212j | |
| CPU | 1.6 GHz | — |
| Cores / threads | 1 core / 1 thread | — |
| RAM (base) | 256 MB | — |
| RAM (max) | — | — |
| Drive bays | 2 | 2 |
| Expandable to | 0 | 0 |
| M.2 slots | 0 | 0 |
| Network | 1× Gigabit Ethernet | 1× Gigabit |
| 10GbE | no | no |
| Max raw capacity | 6 TB | 6 TB |
| Hot-swap | no | no |
| Form factor | desktop | desktop |
| Released | 2011 | 2011 |
| Power consumption | 22 W / 10.8 W | 17.6 W / null |
| DSM at launch | — | — |