Side-by-side specifications of the Synology DS715 and DS720+, from official datasheets. Differences are highlighted.
| DS715 | DS720+ | |
| CPU | Quad-core 1.4GHz | Intel Celeron J4125 |
| Cores / threads | 4 | 4 cores |
| RAM (base) | 2GB | 2 GB DDR4 |
| RAM (max) | 2GB | 6 GB |
| Drive bays | 2 | 2 |
| Expandable to | 5 | 7 |
| M.2 slots | 0 | 2 |
| Network | 2x 1GbE | 2 x GbE RJ-45 |
| 10GbE | no | no |
| Max raw capacity | 56TB | 32 TB |
| Hot-swap | yes | yes |
| Form factor | desktop | desktop |
| Released | 2015 | 2020 |