








Couldn't load pickup availability
Service continuity is at the core of the RS3621RPxs design.
Dual PSUs provide protection against a PSU failure or accidental cord removal while hot-swappable fans can be replaced without powering down the system.
Synology High Availability (SHA) pairs two identical units together creating an active-passive cluster with minute-level failover. Learn more
Btrfs prevents data corruption and reduces maintenance overheads with advanced storage technologies and optimized snapshots.
| CPU Model | Intel Xeon D-1531 | |
| CPU Quantity | 1 | |
| CPU Core | 6 | |
| CPU Architecture | 64-bit | |
| CPU Frequency | 2.2 (base) / 2.7 (turbo) GHz | |
| Hardware Encryption Engine | ||
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Memory
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System Memory | 8 GB DDR4 ECC UDIMM |
| Total Memory Slots | 4 | |
| Maximum Memory Capacity | 64 GB (16 GB x 4) | |
| Notes |
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Storage
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Drive Bays | 12 |
| Maximum Drive Bays with Expansion Unit | 36 (RX1217 x 2) | |
| Drive Type (See all supported drives) |
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| Hot Swappable Drive* | ||
| Notes | Synology only guarantees full functionality, reliability, and performance for Synology drives listed on the compatibility list. The use of non-validated components may limit certain functionality and result in data loss and system instability. | |
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External Ports
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RJ-45 1GbE LAN Port | 4 |
| USB 3.2 Gen 1 Port | 2 | |
| Expansion Port | 2 | |
| Expansion Port Type | Infiniband | |
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PCIe
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PCIe Expansion | 2 x Gen3 x8 slots (x8 link) |
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Appearance
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Form Factor (RU) | 2U |
| Size (Height x Width x Depth) | 88 mm x 482 mm x 724 mm | |
| Weight | 14.5 kg | |
| Rack Installation Support* | 4-post 19" rack (Synology Rail Kit - RKS-02) | |
| Notes | The rail kit is sold separately | |
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Others
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System Fan | 80 mm x 80 mm x 4 pcs |
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| Easy Replacement System Fan | ||
| Power Recovery | ||
| Noise Level* | 50.2 dB(A) | |
| Scheduled Power On / Off | ||
| Wake on LAN / WAN | ||
| Power Supply Unit / Adapter | 500 watts 550 watts* |
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| Redundant Power Supply | ||
| AC Input Power Voltage | 100 V to 240 V AC | |
| Power Frequency | 50/60 Hz, Single Phase | |
| Power Consumption | 140.01 watts (Access) 65.94 watts (HDD Hibernation) |
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| British Thermal Unit | 477.43 BTU/hr (Access) 224.86 BTU/hr (HDD Hibernation) |
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Temperature
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Operating Temperature | 0°C to 35°C (32°F to 95°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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5 Years | |
| Notes | The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) | |
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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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A comprehensive backup and recovery solution for securing data stored on Synology servers. Backup data locally, to another Synology device, rsync server, or cloud-based storage such as Google Drive, Dropbox, S3-compatible destinations, and Synology C2. Deduplication
Easily schedule flexible point-in-time backups of shared folders and iSCSI LUNs with an RPO as low as 5 minutes and recovery in seconds. Set up replication and failover to other Synology storage systems for fast RTOs and minimal service disruption.

