Side-by-side specifications of the Synology RS2211RP+ and RS2212RP+, from official datasheets. Differences are highlighted.
| RS2211RP+ | RS2212RP+ | |
| CPU | Dual Core 1.8 GHz | Dual Core 2.13 GHz |
| Cores / threads | 2 | 2 cores |
| RAM (base) | 1 GB | 1 GB DDR3 |
| RAM (max) | 2 GB | 3 GB |
| Drive bays | 10 | 10 |
| Expandable to | 22 | 22 |
| M.2 slots | 0 | 0 |
| Network | 2x Gigabit | 2x Gigabit |
| 10GbE | no | no |
| Max raw capacity | 30 TB | 66 TB |
| Hot-swap | yes | yes |
| Form factor | 2U rackmount | 2U rackmount |
| Released | 2011 | 2012 |