Side-by-side specifications of the Synology FS2500 and FS3400, from official datasheets. Differences are highlighted.
| FS2500 | FS3400 | |
| CPU | AMD Ryzen V1780B | Intel Xeon D-1541 2.1 GHz |
| Cores / threads | 4 cores / 8 threads | 8 cores / 16 threads |
| RAM (base) | 8 GB DDR4 ECC UDIMM | 16 GB DDR4 ECC RDIMM |
| RAM (max) | 32 GB | 128 GB |
| Drive bays | 12 | 24 |
| Expandable to | 0 | 72 |
| M.2 slots | 0 | 0 |
| Network | 2 × 1GbE RJ-45; 2 × 10GbE RJ-45 | 4 x 1GbE RJ-45, 2 x 10GbE RJ-45 |
| 10GbE | yes | yes |
| Max raw capacity | N/A | 184.32 TB |
| Hot-swap | N/A | yes |
| Form factor | 1U rackmount | 2U rackmount |
| Released | 2025 | 2022 |
| Power consumption | 74.83 W / N/A | 313.84 W / 125.77 W |
| DSM at launch | — | — |