CPU CPU Model Intel Atom C2538 CPU Architecture 64-bit CPU Frequency Quad Core 2.4 GHz Hardware Encryption Engine (AES-NI) Memory System Memory 2/8 GB DDR3 Memory Module Pre-installed 2GB (1 x 2GB) / 8GB (2 x 4GB) Total Memory Slots 2 Memory Expandable up to 16 GB (8 GB x 2) Storage Drive Bays 8 Maximum Drive Bays with Expansion Unit 18 Compatible Drive Type* (See all supported drives) 3.5" SATA HDD 2.5" SATA HDD 2.5" SATA SSD Maximum Internal Raw Capacity 96 TB (12 TB drive x 8) (Capacity may vary by RAID types) Maximum Raw Capacity with Expansion Units 216 TB (96 TB + 12 TB drive x 10) (Capacity may vary by RAID types) Maximum Single Volume Size 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 c model : ADATA XPG SX6000 Lite 512GB PCIe 3D NAND PCIe Internal Solid State Drive tag : NAS