Side-by-side specifications of the Synology DS118 and DS120j, from official datasheets. Differences are highlighted.
| DS118 | DS120j | |
| CPU | Realtek RTD1296, 1.4 GHz | Marvell Armada 3700 88F3720 |
| Cores / threads | 4 cores / 4 threads | 2 cores / 2 threads |
| RAM (base) | 1 GB DDR4 non-ECC | 512 MB DDR3L |
| RAM (max) | — | 512 MB |
| Drive bays | 1 | 1 |
| Expandable to | 0 | 0 |
| M.2 slots | 0 | 0 |
| Network | 1 x 1GbE RJ-45 | 1 x 1GbE RJ-45 |
| 10GbE | no | no |
| Max raw capacity | 10 TB | 16 TB |
| Hot-swap | no | no |
| Form factor | Desktop | Desktop |
| Released | 2017 | 2020 |
| Power consumption | 9.4 W / 4.22 W | — |
| DSM at launch | — | — |