4-bay with expansion
High-speed storage
Two built-in 2.5GbE ports and over 522/565 MB/s sequential read/write4
Versatile applications
2.5GbE connectivity and diverse storage options
The DS925+ features built-in 2.5GbE networking and supports both SATA flash drives and HDDs in 2.5"/3.5" internal bays, as well as M.2 NVMe drives via M.2 slots for use as either cache or storage pools.2
Expand capacity for evolving needs
Consolidate your data with up to 96 TB of raw storage across 4 bays. Need more space? Add capacity with the DX525 for up to 216 TB of total raw storage.3
Store, share, and protect
Manage all your documents, photos, and other files, back up applications and devices, and protect your assets with professional video surveillance.
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Hardware Specifications
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CPU
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CPU Model | AMD Ryzen V1500B |
| CPU Quantity | 1 | |
| CPU Cores | 4 | |
| CPU Threads | 8 | |
| CPU Architecture | 64-bit | |
| CPU Frequency | 2.2 GHz | |
| Hardware Encryption Engine | ||
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Memory
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System Memory | 4 GB DDR4 ECC SODIMM |
| Memory Module Pre-installed | 4 GB (4 GB × 1) | |
| Total Memory Slots | 2 | |
| Maximum Memory Capacity | 32 GB (16 GB x 2) | |
| Notes |
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Storage
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Drive Bays | 4 |
| Maximum Drive Bays with Expansion Unit | 9 (DX525 × 1) | |
| M.2 Drive Slots | 2 (NVMe) | |
| Drive Type (See all supported drives) |
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| Hot Swappable Drive* | ||
| Notes |
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External Ports
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RJ-45 2.5GbE LAN Port | 2 |
| USB 3.2 Gen 1 Port | 2 | |
| Expansion Port | 1 | |
| Expansion Port Type | USB Type-C | |
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Appearance
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Size (Height x Width x Depth) | 166 mm × 199 mm × 223 mm |
| Weight | 2.26 kg | |
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Others
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System Fan | 92 mm × 92 mm × 2 pcs |
| Fan Speed Mode |
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| Brightness Adjustable Front LED Indicators | ||
| Power Recovery | ||
| Noise Level* | 20.5 dB(A) | |
| Scheduled Power On / Off | ||
| Wake on LAN / WAN | ||
| Power Supply Unit / Adapter | 100 watts 120 watts* |
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| AC Input Power Voltage | 100V to 240V AC | |
| Power Frequency | 50/60 Hz, Single Phase | |
| Power Consumption | 37.91 watts (Access) 12.33 watts (HDD Hibernation) |
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| British Thermal Unit | 129.27 BTU/hr (Access) 42.05 BTU/hr (HDD Hibernation) |
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| Notes |
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Temperature
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Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Storage Temperature | -20°C to 60°C (-5°F to 140°F) | |
| Operating Humidity | 8% to 80% RH | |
| Storage Humidity | 5% to 95% RH | |
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Certification
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Warranty
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3-year hardware warranty, extendable to 5 years with EW201 | |
| Notes |
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Environment
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RoHS Compliant | |
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Packaging Content
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Optional Accessories
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| Notes | For multi-module memory configurations, all modules must be identical and share the same model number. Check the Product Manual of your Synology product for recommended memory configurations. | |





