Side-by-side specifications of the Synology RS812RP+ and RS814RP+, from official datasheets. Differences are highlighted.
| RS812RP+ | RS814RP+ | |
| CPU | Intel Atom Dual Core 2.13 GHz | Intel Atom C2538 2.13 GHz |
| Cores / threads | 2 cores / 2 threads | 4 cores / 4 threads |
| RAM (base) | 1 GB DDR3 | 2 GB DDR3 |
| RAM (max) | 3 GB | 4 GB |
| Drive bays | 4 | 4 |
| Expandable to | 4 (RX410) | 4 via RX410 |
| M.2 slots | 0 | 0 |
| Network | 2x Gigabit | 4x Gigabit Ethernet |
| 10GbE | no | no |
| Max raw capacity | 24 TB with RX410 | 40 TB with RX410 |
| Hot-swap | yes | yes |
| Form factor | 1U rackmount | 1U rackmount |
| Released | — | 2014 |
| Power consumption | 46.2 W / unknown | — |
| DSM at launch | — | — |
Choose the RS814RP+ for its faster quad-core CPU, 2GB RAM expandable to 4GB, and four bays expandable to eight with an RX410; the RS812RP+ has a slower dual-core CPU, 1GB expandable to 3GB, and four bays expandable to eight with an RX410. Neither supports 10GbE or M.2, so choose the RS814RP+ unless the RS812RP+ is substantially cheaper.