Side-by-side specifications of the Synology DS114 and DS115, from official datasheets. Differences are highlighted.
| DS114 | DS115 | |
| CPU | Marvell Armada 370 1.2 GHz | Marvell Armada 375 800 MHz |
| Cores / threads | 1 core / 1 thread | 2 cores / 2 threads |
| RAM (base) | 512 MB | 512 MB DDR3 |
| RAM (max) | 512 MB | 512 MB |
| Drive bays | 1 | 1 |
| Expandable to | 0 | 0 |
| M.2 slots | 0 | 0 |
| Network | 1x Gigabit Ethernet | 1× Gigabit Ethernet |
| 10GbE | no | no |
| Max raw capacity | 4 TB | 6 TB |
| Hot-swap | no | no |
| Form factor | Desktop | Desktop |
| Released | 2013 | 2015 |
| Power consumption | — | — |
| DSM at launch | — | — |
Choose the DS115 if you want the newer/faster unit: it uses a dual-core Marvell Armada 375 at 1.0 GHz versus the DS114’s single-core Armada 370 at 1.2 GHz, and both top out at 1 GB RAM. Both are 1-bay NASes with no expansion, no 10GbE, and no M.2 slots, so the real deciding factor is the DS115’s newer CPU platform.