Side-by-side specifications of the Synology DS207 and DS209j, from official datasheets. Differences are highlighted.
| DS207 | DS209j | |
| CPU | 500 MHz | 266MHz 32-bit with floating point |
| Cores / threads | 1/1 | 1/1 |
| RAM (base) | 128 MB | 64MB |
| RAM (max) | 128 MB | — |
| Drive bays | 2 | 2 |
| Expandable to | 0 | 0 |
| M.2 slots | 0 | 0 |
| Network | 1GbE x1 | 1x Gigabit |
| 10GbE | no | no |
| Max raw capacity | 2 TB | 4TB (2x 2TB) |
| Hot-swap | no | no |
| Form factor | Desktop | Desktop |
| Released | 2008 | 2009 |
| Power consumption | 28.2 W / 9.5 W | 15–36 W / unknown |
| DSM at launch | — | 2.2 |