Side-by-side specifications of the Synology RS3617xs+ and SA3400, from official datasheets. Differences are highlighted.
| RS3617xs+ | SA3400 | |
| CPU | Intel Xeon D-1531 | Intel Xeon D-1541 |
| Cores / threads | 6/12 | 8-core |
| RAM (base) | 8GB | 16 GB |
| RAM (max) | 64GB | 128 GB |
| Drive bays | 12 | 12 |
| Expandable to | 36 | 96 |
| M.2 slots | 0 | 0 |
| Network | 4x1GbE,2x10GbE | 2x 10GbE + 4x 1GbE |
| 10GbE | yes | yes |
| Max raw capacity | 360 TB | 1536 TB |
| Hot-swap | yes | yes |
| Form factor | rack 2U | rackmount |
| Released | 2017 | 2017 |