Caractéristiques des Synology RS408 et RS408RP côte à côte, d'après les fiches techniques officielles. Les différences sont surlignées.
| RS408 | RS408RP | |
| CPU | 800 MHz | 800 MHz |
| Cœurs / threads | — | — |
| RAM (base) | 512 MB | 512 MB |
| RAM (max.) | — | — |
| Baies | 4 | 4 |
| Extensible à | 0 | — |
| Emplacements M.2 | 0 | 0 |
| Réseau | 2x Gigabit | 2× Gigabit |
| 10GbE | no | no |
| Capacité brute max. | 4 TB | 4 TB |
| Remplacement à chaud | yes | yes |
| Format | 1U rackmount | 1U rackmount |
| Sortie | — | — |
| Consommation | 69.5 W / 25 W | 69.5 W / 25 W |
| DSM à la sortie | — | — |
Pick the RS408RP only if you need the dual power supplies for redundancy; otherwise the RS408 is the better value. For the decision you asked about, both are effectively the same on core hardware: same CPU class, same RAM ceiling, same bay count/expansion, and no built-in 10GbE or M.2 on either. In short, buy the RS408 unless redundant power is a must-have.