Side-by-side specifications of the Synology RS814+ and RS814RP+, from official datasheets. Differences are highlighted.
| RS814+ | RS814RP+ | |
| CPU | Intel Atom 2.13 GHz dual-core | Intel Atom C2538 2.13 GHz |
| Cores / threads | 2 cores / 2 threads | 4 cores / 4 threads |
| RAM (base) | 2 GB DDR3 | 2 GB DDR3 |
| RAM (max) | 4 GB | 4 GB |
| Drive bays | 4 | 4 |
| Expandable to | 4 via RX410 | 4 via RX410 |
| M.2 slots | 0 | 0 |
| Network | 4x Gigabit Ethernet | 4x Gigabit Ethernet |
| 10GbE | no | no |
| Max raw capacity | 40 TB with RX410 | 40 TB with RX410 |
| Hot-swap | yes | yes |
| Form factor | 1U rackmount | 1U rackmount |
| Released | 2014 | 2014 |
| Power consumption | — | — |
| DSM at launch | — | — |
Choose the RS814RP+ if you want a redundant power supply; otherwise the RS814+ is the same class of box and is usually the better value. Both use the same CPU and RAM ceiling, both have 4 bays and no expansion to add more internal bays, and neither supports 10GbE or M.2.