Side-by-side specifications of the Synology RS815 and RS826+, from official datasheets. Differences are highlighted.
| RS815 | RS826+ | |
| CPU | dual-core CPU | AMD Ryzen V1500B |
| Cores / threads | 2 cores / 2 threads | 4 cores / 8 threads |
| RAM (base) | 1 GB DDR3 | 4 GB DDR4 ECC SODIMM |
| RAM (max) | 1 GB | 32 GB (16 GB x 2) |
| Drive bays | 4 | 4 |
| Expandable to | 4 | 8 (with RX426) |
| M.2 slots | 0 | unknown |
| Network | 2x Gigabit | 4 x 1GbE RJ-45 |
| 10GbE | no | optional |
| Max raw capacity | 32 TB | 200 TB single volume |
| Hot-swap | yes | yes |
| Form factor | 1U rackmount | 1U rackmount |
| Released | 2015 | 2026 |
| Power consumption | — | 37.73 W / 15.57 W |
| DSM at launch | — | — |