Side-by-side specifications of the Synology RS812RP+ and RS815+, from official datasheets. Differences are highlighted.
| RS812RP+ | RS815+ | |
| CPU | Intel Atom Dual Core 2.13 GHz | Intel Atom C2538 |
| Cores / threads | 2 cores | 4C/4T |
| RAM (base) | 1GB DDR3 | 2 GB DDR3 |
| RAM (max) | 3GB | 6 GB |
| Drive bays | 4 | 4 |
| Expandable to | 4 with RX410 | 8 |
| M.2 slots | 0 | 0 |
| Network | 2x Gigabit | 4x Gigabit |
| 10GbE | no | no |
| Max raw capacity | 16TB; 24TB with RX410 | 24 TB |
| Hot-swap | yes | yes |
| Form factor | 1U rackmount | 1U rackmount |
| Released | 2012 | 2015 |