Hardware Specifications CPU CPU Model Intel Xeon D-1527 CPU Architecture 64-bit CPU Frequency Quad Core 2.2 (base) / 2.7 (turbo) GHz Hardware Encryption Engine (AES-NI)  Memory System Memory 8 GB DDR4 ECC UDIMM Memory Module Pre-installed 8GB (1 x 8GB) Total Memory Slots 4 Memory Expandable up to 64 GB (16 GB x 4) Storage Drive Bays 4 Maximum Drive Bays with Expansion Unit 16 M.2 Drive Slots 2 (NVMe & SATA) Compatible Drive Type* (See all supported drives) •3.5" SATA HDD •2.5" SATA HDD •2.5" SATA SSD •M.2 2280 NVMe & SATA SSD Maximum Internal Raw Capacity 56 TB (14 TB drive x 4) (Capacity may vary by RAID types) Maximum Raw Capacity with Expansion Units 224 TB (56 TB + 14 TB drive x 12) (Capacity may vary by RAID types) Maximum Single Volume Size •200 TB (32GB RAM required, for RAID 5 or RAID 6 groups only) •108 TB Hot Swappable Drive  Notes •"Compatible drive type" indicates the 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. (Learn more) •Expansion of the internal volume is only supported if the combined single volume size does not exceed the maximum limit of 108TB or 200TB if upgraded to 32GB RAM or more. External Ports RJ-45 1GbE LAN Port 4 (with Link Aggregation / Failover support) USB 3.0 Port 2 Expansion Port 1 PCIe PCIe Expansion 1 x Gen3 x8 slot (x8 link) Add-in-card support PCIe Network Interface Card (Learn more) File System Internal Drives •Btrfs •EXT4 External Drives •Btrfs •EXT4 •EXT3 •FAT •NTFS •HFS+ •exFAT* Notes exFAT Access is purchased separately in Package Center. Appearance Size (Height x Width x Depth) 44 mm x 480 mm x 518.6 mm Weight 8.16 kg Others System Fan 40 mm x 40 mm x 2 pcs Fan Speed Mode •Full-Speed Mode •Cool Mode •Quiet Mode Easy Replacement System Fan  Power Recovery  Noise Level* 39.3 dB(A) Scheduled Power On/Off  Wake on LAN/WAN  Power Supply Unit / Adapter 2 X 150W AC Input Power Voltage 100V to 240V AC Power Frequency 50/60 Hz, Single Phase Power Consumption* 68.68 W (Access) 34.78 W (HDD Hibernation) British Thermal Unit 234.35 BTU/hr (Access) 118.67 BTU/hr (HDD Hibernation)