CPU Model : Intel Atom C2538-CPU Architecture : 64-bit-CPU Frequency : Quad Core 2.4 GHz-System Memory : 2 GB DDR3-Memory Module Pre-installed : 2 GB (2 GB x 1)-Total Memory Slots : 2-Memory Expandable up to : 16 GB (8 GB x 2)-Drive Bays : 4-Maximum Drive Bays with Expansion Unit : 8-Compatible Drive Type* : 3.5" SATA HDD2.5" SATA HDD2.5" 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 : 112 TB (56 TB + 14 TB drive x 4) (Capacity may vary by RAID types)-Maximum Single Volume Size : 108 TB-RJ-45 1GbE LAN Port : 4 (with Link Aggregation / Failover support)-USB 3.0 Port : 2-eSATA Port : 1-PCIe Expansion : 1 x Gen2 x8 slot (x4 link)Add-in-card support : PCIe Network Interface card M2D18 - Dual M.2 SATA SSD Adapter card for SSD cache