Side-by-side specifications of the Synology RS812 and RS812RP+, from official datasheets. Differences are highlighted.
| RS812 | RS812RP+ | |
| CPU | Intel Atom Dual Core 2.13 GHz | Intel Atom Dual Core 2.13 GHz |
| Cores / threads | 2 cores / 2 threads | 2 cores / 2 threads |
| RAM (base) | 1 GB DDR3 | 1 GB DDR3 |
| RAM (max) | 3 GB | 3 GB |
| Drive bays | 4 | 4 |
| Expandable to | 4 via RX410 | 4 (RX410) |
| M.2 slots | 0 | 0 |
| Network | 2x Gigabit | 2x Gigabit |
| 10GbE | no | no |
| Max raw capacity | 24 TB with RX410 | 24 TB with RX410 |
| Hot-swap | yes | yes |
| Form factor | 1U rackmount | 1U rackmount |
| Released | 2012 | — |
| Power consumption | 37 W / unknown | 46.2 W / unknown |
| DSM at launch | — | — |
Choose the RS812RP+ if you need better performance and redundancy: it has a dual-core 2.13 GHz Intel Atom D2701 versus the RS812’s 1.6 GHz dual-core Atom D2550, supports 6GB RAM versus 4GB, and adds redundant power supplies. Both have four bays and no built-in 10GbE or M.2 support; neither offers meaningful bay expansion, so the RS812 is adequate only for lighter workloads.