Side-by-side specifications of the Synology DS1813+ and DS3615XS, from official datasheets. Differences are highlighted.
| DS1813+ | DS3615XS | |
| CPU | Intel Atom D2700 | Intel Core i3-4130 |
| Cores / threads | 2C/4T | 2C/4T |
| RAM (base) | 1GB | 4GB DDR3 ECC |
| RAM (max) | 4GB | 32GB |
| Drive bays | 8 | 12 |
| Expandable to | 10 | 24 |
| M.2 slots | 0 | 0 |
| Network | 4x GbE | 4x1GbE |
| 10GbE | no | optional |
| Max raw capacity | 72TB | 216TB |
| Hot-swap | yes | yes |
| Form factor | desktop | desktop |
| Released | 2013 | 2014 |