Side-by-side specifications of the Synology DS1512+ and DS1515+, from official datasheets. Differences are highlighted.
| DS1512+ | DS1515+ | |
| CPU | Intel Atom D2700 | Intel Atom C2538 |
| Cores / threads | 2 cores / 4 threads | 4 cores / 4 threads |
| RAM (base) | 1 GB | 2 GB DDR3 |
| RAM (max) | 3 GB | 6 GB |
| Drive bays | 5 | 5 |
| Expandable to | 10 (2× DX510) | 10 (with DX513) |
| M.2 slots | 0 | 0 |
| Network | 2× Gigabit Ethernet | 4 x Gigabit |
| 10GbE | no | no |
| Max raw capacity | 60 TB | 30 TB internal; 90 TB with DX513 expansion |
| Hot-swap | yes | yes |
| Form factor | desktop | Desktop |
| Released | 2012 | 2015 |
| Power consumption | 50.6 W / unknown | 72.5 W / 18.4 W |
| DSM at launch | 4.0 | — |