Side-by-side specifications of the Synology DS115 and DS116, from official datasheets. Differences are highlighted.
| DS115 | DS116 | |
| CPU | Marvell Armada 375 800 MHz | Marvell ARMADA 385 88F6820 1.8GHz |
| Cores / threads | 2 cores / 2 threads | 2 cores / 2 threads |
| RAM (base) | 512 MB DDR3 | 1GB DDR3 |
| RAM (max) | 512 MB | 1GB |
| Drive bays | 1 | 1 |
| Expandable to | 0 | 0 |
| M.2 slots | 0 | 0 |
| Network | 1× Gigabit Ethernet | 1 x Gigabit RJ-45 |
| 10GbE | no | no |
| Max raw capacity | 6 TB | 8TB |
| Hot-swap | no | no |
| Form factor | Desktop | Desktop |
| Released | 2015 | 2016 |
| Power consumption | — | — |
| DSM at launch | — | — |
Choose the DS116: its dual-core 1.8 GHz CPU and 1 GB RAM outperform the DS115’s 800 MHz single-core CPU and 512 MB RAM. Both are single-bay units with no expansion, 10GbE, or M.2 support, so choose the DS115 only if it is substantially cheaper for basic file storage.