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Scalable NAS with SSD cache acceleration capability
Synology DiskStation DS1520+ is an ideal network-attached storage solution suitable for small office and IT enthusiasts. Two built-in M.2 SSD slots and Synology SSD Cache technology allow you to boost system I/O and application performance. The scalable storage design of DS1520+ lets you start small and expand storage capacity with Synology DX517 as your data grows.
CPU - 4-core 2.0 GHz, burst up to 2.7 GHz
Cache Acceleration - 2 x built-in M.2 2280 NVMe SSD slots
Performance - Average 19.8% boost to computing-intensive applications1
Scalability - Expand up to 15 drives with a DX517 expansion unit
Optimize performance and capacity
DS1520+ provides two built-in M.2 SSD slots so that you can take full advantage of Synology SSD Cache functionality. Add SSD cache for up to 20 times faster I/O response without using front drive bays. You can add 10 more drives with two Synology DX517 to expand storage capacity.
Accelerate demanding applications
A more powerful CPU speeds up computing-intensive applications. The new 4-core processor boosts photo indexing, database response times, and web PHP response efficiency. Easily categorize your photo memories, smoothly manage files across computers and mobile devices, and enjoy blazing fast web applications.
Access and sync your files seamlessly
Synology Drive provides a built-in universal portal to access your data anytime and anywhere, and synchronize all your files across platforms, including Windows, macOS, Linux, Android, and iOS. Learn more
Sync files on demand: Save the storage space and network bandwidth of your PC.
Go back in time: Easily retrieve previous versions of your shared files.
Back up your data: Protect your files as scheduled or in real-time.
Real-time collaboration on your private cloud
Synology Office is a collaboration package combining the convenience and usability of public clouds with the data privacy and security guaranteed by private clouds. It allows you to work seamlessly together on documents and spreadsheets in a protected environment. Learn more
Real-time collaboration on the same online documents to boost productivity,
Instant communication on Synology Chat during the editing of documents or spreadsheets
Version control for you to navigate all the changes and retrieve previous versions with just a click
Virtual Machine Manager
Virtual Machine Manager enables you to test new software in sandboxes, isolate your customers' machines, and increase the flexibility of your server. You can easily run Windows, Linux, and Virtual DSM on your Synology NAS by just a few steps. Learn more
Snapshots for virtual machines
Perfectly clone and restore a virtual machine within seconds.
Seamlessly migrate Virtual DSM instances from a Synology NAS to another.
Create multiple isolated virtual machines for subsidiary business units or departments.
Engineered for reliability, backed by Synology
DS1520+ is designed to reliably store your data and is backed by Synology's three-year hardware warranty. An optional two-year extended warranty is available in select regions for up to five years of coverage. Learn more
Powered by Synology DSM
Complete multimedia solution for management, streaming, and playback.
Store multiple backup versions with block-level incremental data backup and cross-version deduplication.
Simplified backup solution for your Mac, PC, and mobile devices.
Schedulable and instantaneous data protection for shared folders and iSCSI LUNs for disaster prevention.
Complete surveillance solution for recording, monitoring, and management.
Virtual Machine Manager
Run various operating systems in isolated sandboxes. Seamlessly clone, restore and migrate virtual machines.
Intel Celeron J4125
4-core 2.0 (base) / 2.7 (burst) GHz
Hardware Encryption Engine (AES-NI)
8 GB DDR4 non-ECC
Memory Module Pre-installed
8 GB (4 GB + 4 GB)
Total Memory Slots
Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion.
Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.
Maximum Drive Bays with Expansion Unit
15 (DX517 x 2)
M.2 Drive Slots
Compatible Drive Type* (See all supported drives)
3.5" SATA HDD
2.5" SATA HDD
2.5" SATA SSD
M.2 2280 NVMe SSD
Maximum Internal Raw Capacity
80 TB (16 TB drive x 5) (Capacity may vary by RAID types)
Maximum Raw Capacity with Expansion Units
240 TB (80 TB + 16 TB drive x 10) (Capacity may vary by RAID types)
Maximum Single Volume Size*
Hot Swappable Drive
"Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.
The maximum raw capacity is not limited by the maximum single volume size. Synology NAS models may utilize capacities over the maximum single volume size as long as each volume created is below the limit.
Each internal volume (may consist of multiple drives) is expandable up to 108TB.
RJ-45 1GbE LAN Port
4 (with Link Aggregation / Failover support)
USB 3.0 Port
exFAT Access is purchased separately in Package Center.
Size (Height x Width x Depth)
166 mm x 230 mm x 223 mm
92 mm x 92 mm x 2 pcs
Fan Speed Mode
Brightness Adjustable Front LED Indicators
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter
AC Input Power Voltage
100 V to 240 V AC
50/60 Hz, Single Phase
36.67 W (Access)
15.51 W (HDD Hibernation)
British Thermal Unit
125.21 BTU/hr (Access)
52.96 BTU/hr (HDD Hibernation)
Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
0°C to 40°C (32°F to 104°F)
-20°C to 60°C (-5°F to 140°F)
5% to 95% RH
3-year hardware warranty, extendable to 5-year coverage - EW201
The warranty period starts from the purchase date as stated on your purchase receipt.
Main Unit X 1
Accessory Pack X 1
AC Power Adapter X 1
AC Power Cord X 1
RJ-45 LAN Cable X 2
Quick Installation Guide X 1
Expansion Units: DX517
2.5" SATA SSD: SAT5200
M.2 2280 NVMe SSD: SNV3400
Surveillance Device License Pack
Model specifications are subject to change without prior notice.
The figures are based on Synology internal testing. No other services or applications are processed during the performance tests.
| Stock code || IBSY-1520P12|
| Brand || Synology|
| Series || DiskStation NAS|
| Model || DS1520+ (12GB)|
| Type || 5-Bay, 2x NVMe (4GB + 8GB non-Synology RAM)|
| ROHS || Y|
| Min Qty || 789|
| Date added || 17/08/2020|
DS1520+ (12GB) Spec Information
| Form Factor / Drive Height || 166 x 230 x 223 mm|
| Platter size || 3.5"|
| Platter (alternate) || 2.5"|
| RAM/Cache || 12GB|
| Guarantee || 3yr|
| Processor || Intel Celeron J4125 4-core 2.0 GHz, burst up to 2.7 GHz|
| CPU Mark (cpubenchmark.net) || 3035|
| Total Drives || 5|
| Total Drives (alternate) || 5|
| RAID || 0:1:5:6:|
DS1520+ (12GB) Spec Connections
DS1520+ (12GB) Speed
| Speed/RPM || SATA 6Gb/s to 1GbE|
| Weight (kg) || 3.2kg|
| Weight (bare) || 2.26kg|
| Colour || Black|
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Synology DiskStation NAS DS1520+ (12GB) reviews
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20/12/2020 | Guest
You can start with any number of drives, and leave some room for future expansion. We recommend that you use exactly the same make and model of drive when expanding your RAID.
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