Side-by-side specifications of the Synology RS2212+ and RS2212RP+, from official datasheets. Differences are highlighted.
| RS2212+ | RS2212RP+ | |
| CPU | Dual Core 2.13 GHz | Dual Core 2.13 GHz |
| Cores / threads | 2 | 2 cores |
| RAM (base) | 1GB DDR3 | 1 GB DDR3 |
| RAM (max) | 3GB | 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 | 66TB | 66 TB |
| Hot-swap | yes | yes |
| Form factor | 2U | 2U rackmount |
| Released | 2012 | 2012 |
They’re effectively the same platform: both have the same CPU class, 4 GB RAM and a 4 GB ceiling, 2 bays, no expansion support, no 10GbE, and no M.2. The only decisive difference is the RP+ power supply: RS2212RP+ has redundant hot-swap PSUs, while RS2212+ has a single PSU. For a home/SMB buyer, pick the RP+ only if uptime on power matters; otherwise they’re functionally the same.