Side-by-side specifications of the Synology DS1815+ and DS3622xs+, from official datasheets. Differences are highlighted.
| DS1815+ | DS3622xs+ | |
| CPU | Intel Atom C2538 | Intel Xeon D-1531 |
| Cores / threads | 4 cores / 4 threads | 6 cores / 12 threads |
| RAM (base) | 2 GB DDR3 | 16 GB DDR4 ECC SODIMM |
| RAM (max) | 6 GB | 48 GB |
| Drive bays | 8 | 12 |
| Expandable to | 10 (DX513; 18 total) | 36 (with 2 DX1222) |
| M.2 slots | 0 | 0 (requires adapter card) |
| Network | 4x Gigabit Ethernet | 2 x 1GbE, 1 x 10GbE RJ-45 |
| 10GbE | no | yes |
| Max raw capacity | 48 TB internal; 108 TB with DX513 expansion | 200 TB single volume |
| Hot-swap | yes | yes |
| Form factor | Tower | tower |
| Released | 2014 | 2021 |
| Power consumption | — | 94.42 W / 54.33 W |
| DSM at launch | — | 7.0 |