Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q77 Processors : Intel Core i5 Memory Support : Up to 16 GB DDR3 1333 MHz SDRAM  Hard Drive : 160MB to 1 TB 2.5" SATA, 64GB to 1TB Solid State Drive 2.5" SATA (optional) Removable Media : SATA DVD-ROM drive, SATA DVD Writer Drive, SATA Blu-ray Writer Drive (Slim-Line) Expansion Bays : External: One (1) Slimline bay for ODD Internal: One (1) 2.5-inch Expansion Slots : N/A Graphics : Intel HD Graphics: Basic, 2000, 2500, 4000 Audio : Realtek ALC261 codec Communications : Intel 82579LM integrated GbE Network Connection I/O Ports : Front: Four (4) USB 2.0, Audio I/O, Rear: Six (6) USB 2.0, Audio I/0, Two(2) Display Port Input Devices : Standard Keyboard (PS/2 or USB) Power : 135W Dimensions : 25.4 x 25.2 x 6.6 cm Weight : 3.1 kg