Caractéristiques des Synology RS408 et RS409 côte à côte, d'après les fiches techniques officielles. Les différences sont surlignées.
| RS408 | RS409 | |
| CPU | 800 MHz | 1.2GHz |
| Cœurs / threads | — | — |
| RAM (base) | 512 MB | 256MB |
| RAM (max.) | — | — |
| Baies | 4 | 4 |
| Extensible à | — | 8 |
| Emplacements M.2 | 0 | 0 |
| Réseau | 2x Gigabit | 2x Gigabit |
| 10GbE | no | no |
| Capacité brute max. | 4 TB | 3TB internal; 8 bays w/ RX4 |
| Remplacement à chaud | yes | yes |
| Format | 1U rackmount | 1U rackmount |
| Sortie | 2008 | 2009 |
I can’t reliably compare RS408 vs RS409 from the specs you provided, because both spec fields are empty. If you send the CPU, RAM max, bay/expansion, 10GbE, and M.2 details for each, I’ll give you a 2–3 sentence recommendation.