| Clustering Supported, eSATA, Network (RJ-45), RAID Supported | Yes |
| Controller Type | Serial ATA |
| Country of Origin | Taiwan |
| Depth | 19.4" |
| Ethernet Technology | Gigabit Ethernet |
| Expansion Slot Type | PCI Express 3.0 x8 |
| Form Factor | Rack-mountable |
| Height | 1.7" |
| Maximum Power Supply Wattage | 150 W |
| Memory Technology | DDR4 SDRAM |
| Number of 2.5" / 3.5" Bays, Number of Hard Drives Supported, Number of Network (RJ-45) Ports, Number of Total Expansion Bays | 4 |
| Number of Hard Drives Installed, Number of Solid State Drive Installed | 0 |
| Number of Power Supplies Installed, Number of Total Expansion Slots, Packaged Quantity | 1 |
| Number of USB 3.0 Ports, Total Number of USB Ports | 2 |
| Operating System | DiskStation Manager |
| Processor Core | Quad-core (4 Core) |
| Processor Manufacturer | Intel |
| Processor Model | C3538 |
| Processor Speed | 2.10 GHz |
| Processor Type | Atom |
| Product Family, Product Series | Plus |
| Product Model | RS820+ |
| Product Name | Synology 4 Bay Rack Mounted NAS RS820+ |
| Product Type | SAN/NAS Storage System |
| Rack Height | 1U |
| RAID Levels | 0, 1, 5, 6, 10, Basic, Hybrid RAID, JBOD |
| Standard Memory | 2 GB |
| Total Hard Drive Capacity Supported, Total Solid State Drive Capacity Supported | 64 TB |
| Width | 18.9" |