Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset: Intel Q170 Processors: Intel 6th & 7th generation Core i5-i7 Quad Core, Core i3 Dual Core Memory Support: Four (4) DIMM slots , DDR3 Up to 16 GB 1600 MHz Hard Drive : Up to 2 TB or SSD (optional) SATA, M.2 SSD (Optional) Removable Media : DVD-ROM/ DVD-ReWritable slim (optional), Card reader (optional) Expansion Bays : 1 (total) / 0 (free) x external 5.25" Slim Line, 1 (total) / 0 (free) x internal 2 x 2.5"/3.5" shared Expansion Slots : 2 x PCIe x16, 1 x PCIe x1, 1 x PCI, 1 M.2 Graphics : Integrated Intel HD Graphics (depends on CPU) Audio : Integrated Audio Communications : Integrated Intel® i219-V Ethernet LAN 10/100/1000 I/O Ports : 10 External USB: 6 x 3.0 (2 front/4 rear) and 4 x 2.0 (2 front/2 rear - 1 front with PowerShare); 1 Internal USB 2.0; 1 RJ-45; 1 Serial; 2 Display Port 1.2; 1 HDMI 1.4; 2 PS/2; 1 UAJ, 1 Line-out; Power : 240 W Dimensions : 35 x 15.4 x 27.4 cm Weight : 7.93 kg