Side-by-side specifications of the Synology DS1817 and SA6400, from official datasheets. Differences are highlighted.
| DS1817 | SA6400 | |
| CPU | Intel Atom C2538 1.7 GHz | AMD EPYC 7272 |
| Cores / threads | quad-core/4 threads | 12 cores / 24 threads |
| RAM (base) | 4 GB | 32 GB DDR4 ECC RDIMM |
| RAM (max) | 8 GB | 1024 GB |
| Drive bays | 8 | 12 |
| Expandable to | 10 | 108 |
| M.2 slots | 0 | — |
| Network | 2 x 1GbE RJ-45, 2 x 10GBASE-T RJ-45 | 4×1GbE RJ-45, 2×10GbE RJ-45, 1×management LAN |
| 10GbE | yes | yes |
| Max raw capacity | 180 TB | 1.944 PB |
| Hot-swap | yes | yes |
| Form factor | desktop | 2U rackmount |
| Released | 2017 | 2025 |
| Power consumption | — | 180.5 W / 88.56 W |
| DSM at launch | — | — |