Side-by-side specifications of the Synology RS2423+ and RS2821RP+, from official datasheets. Differences are highlighted.
| RS2423+ | RS2821RP+ | |
| CPU | AMD Ryzen V1780B | AMD Ryzen V1500B |
| Cores / threads | 4/8 | 4 |
| RAM (base) | 8 GB DDR4 ECC UDIMM | 4 GB |
| RAM (max) | 32 GB | 32 GB |
| Drive bays | 12 | 16 |
| Expandable to | 24 | 28 |
| M.2 slots | 0 | 2 |
| Network | 2x 1GbE, 1x 10GbE | 4 x 1GbE RJ-45 |
| 10GbE | yes | optional |
| Max raw capacity | 432 TB | 108 TB |
| Hot-swap | yes | yes |
| Form factor | 2U | 3U rackmount |
| Released | 2025 | 2021 |