Especificaciones de los Synology DS209j y DS209+ en paralelo, de las fichas técnicas oficiales. Las diferencias están resaltadas.
| DS209j | DS209+ | |
| CPU | 266MHz 32-bit with floating point | 800 MHz |
| Núcleos / hilos | 1/1 | 1 core / 1 thread |
| RAM (base) | 64MB | 512 MB |
| RAM (máx.) | — | 512 MB |
| Bahías | 2 | 2 |
| Ampliable a | 0 | 0 |
| Ranuras M.2 | 0 | 0 |
| Red | 1x Gigabit | 1× Gigabit |
| 10GbE | no | no |
| Capacidad bruta máx. | 4TB (2x 2TB) | 2 TB |
| Intercambio en caliente | no | no |
| Formato | Desktop | Desktop |
| Lanzamiento | 2009 | 2008 |
| Consumo | 15–36 W / unknown | 32.4 W / 18 W |
| DSM de lanzamiento | 2.2 | 2.0 |
Choose the DS209+ if you want the faster CPU and higher RAM ceiling; the DS209j is the slower, lower-memory option. Neither has 10GbE or M.2, and both are 2-bay units with no expansion.