Synology DS425+ vs Synology RS422+
Two of the 4-bay nas in our best 4-bay nas comparison, lined up spec by spec. Every figure comes from the manufacturer pages linked below, and the scores use the same published formula as the full ranking.
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Best for: 4 official bays, 2 GB official installed memory, 2.5GbE official onboard Ethernet, 4-core official CPU
Check price at AmazonBest for: 4 official bays, 2 GB official installed memory, 1GbE official onboard Ethernet, 2-core official CPU
Check price at AmazonSpec-by-spec comparison
Green marks the better published figure. "Not listed" means the manufacturer doesn't publish it.
| Spec | Synology DS425+ | Synology RS422+ | Weight |
|---|---|---|---|
| Installed system memoryOfficial installed system memory published on the maker's specification table. A larger official figure is better for running services alongside file storage. Missing values take the category minimum. | 2 GB | 2 GB | 28% |
| Fastest official onboard EthernetFastest official onboard Ethernet port speed on the maker's specification table, in gigabits per second. Optional ports that the official table lists only as PCIe or add-in-card upgrades are not counted. Missing values take the category minimum. | 2.5 Gbps | 1 Gbps | 26% |
| Official CPU core countOfficial CPU core count published on the maker's specification table. Core count is not a complete performance picture across ARM and x86 designs, but it is a consistently published official figure. Missing values take the category minimum. | 4 | 2 | 24% |
| Official onboard Ethernet portsNumber of official onboard Ethernet ports on the maker's specification table. Missing values take the category minimum. | 2 | 2 | 22% |
| Drive bays (official table) | 4 official bays — 4 × 3.5" SATA HDD or 2.5" SATA SSD 2 × M.2 2280 NVMe SSD | 4 official bays — 4 × 3.5" SATA HDD or 2.5" SATA SSD | info |
| M.2 slots (official table) | 2 | Not listed | info |
| Installed system memory (official table) | 2 GB DDR4 non-ECC | 2 GB DDR4 ECC | info |
| Maximum memory capacity (official table) | 6 GB (2 GB + 4 GB) | Not listed | info |
| Memory type (official table) | Official installed memory is listed as non-ECC | Official installed memory is listed as ECC | info |
| CPU (official table) | Intel Celeron J4125 | AMD Ryzen R1600 | info |
| Official CPU core count | 4 | 2 | info |
| Official CPU thread count | 4 | 4 | info |
| Fastest official onboard Ethernet | 2.5 Gbps | 1 Gbps | info |
| Official onboard Ethernet port count | 2 | 2 | info |
| Official onboard Ethernet rows | 1 × official 1GbE (RJ-45 1GbE LAN Port: 1); 1 × official 2.5GbE (RJ-45 2.5GbE LAN Port: 1) | 2 × official 1GbE (RJ-45 1GbE LAN Port: 2) | info |
| Aggregate official onboard Ethernet (computed) | 3.5 Gbps, computed as the sum of official onboard port count × official port speed from the published LAN rows (1 × official 1GbE (RJ-45 1GbE LAN Port: 1); 1 × official 2.5GbE (RJ-45 2.5GbE LAN Port: 1)) | 2 Gbps, computed as the sum of official onboard port count × official port speed from the published LAN rows (2 × official 1GbE (RJ-45 1GbE LAN Port: 2)) | info |
| Form factor (official table or official model family) | desktop | 1U | info |
| Hot-swappable drives (official table) | Yes | Yes | info |
| Dimensions (official table) | 166 mm × 199 mm × 223 mm | 44 mm × 478 mm × 327.5 mm | info |
| Weight (official table) | 2.18 kg | 4.38 kg | info |
| Power supply (official table) | 90 watts | 100 watts | info |
| Hardware Encryption Engine (official table) | YES | YES | info |
| Total Memory Slots (official table) | 1 | Not listed | info |
| USB 3.2 Gen 1 Port (official table) | 2 | 1 | info |
| Noise Level (official table) | 21.6 dB(A) | 28.5 dB(A) | info |
| Wake on LAN / WAN (official table) | YES | YES | info |
| Power Consumption (official table) | 28.25 watts (Access) / 6.10 watts (HDD Hibernation) | 37.93 watts (Access) / 13.43 watts (HDD Hibernation) | info |
| PCIe (official table) | Not listed | PCIe Expansion | info |
| VaultPick score | 2.2/10 | 0.9/10 | 100% |
Where each one comes out ahead
Synology DS425+
Better published figure on: Fastest official onboard Ethernet, Official CPU core count.
What we like
- Official table lists a 2.5GbE onboard Ethernet port
- Official maximum memory capacity is 6 GB
- Official table lists 2 M.2 slots
- Official table lists hot-swappable drive bays
Watch out for
- Official installed system memory is 2 GB
Synology RS422+
No scored spec where it is strictly ahead; its case rests on the strengths below.
What we like
- Official installed memory is listed as ECC
- Official table lists hot-swappable drive bays
Watch out for
- Fastest official onboard Ethernet on the table we used is 1GbE
- Official installed system memory is 2 GB
- Official table we used does not list a maximum expandable memory capacity
- Official CPU core count is 2
Verdict
The official specification tables list the Synology DS425+ as a desktop unit and the Synology RS422+ as a rackmount unit. The Synology DS425+ record lists 4 official bays, 2 GB official installed memory, 2.5GbE official onboard Ethernet, 4-core official CPU, 2 official onboard Ethernet ports. The Synology RS422+ record lists 4 official bays, 2 GB official installed memory, 1GbE official onboard Ethernet, 2-core official CPU, 2 official onboard Ethernet ports.
- Synology DS425+: Synology official specifications: DS425+
- Synology RS422+: Synology official specifications: RS422+