Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q65 Express Processors : Intel Core i5 Memory Support : Four (4) DIMM slots , Up to 16 GB DDR3 1333 MHz SDRAM  Hard Drive : 160MB to 1 TB , 64GB to 1TB Solid State Drive (optional) Removable Media : SATA DVD-ROM drive, SATA DVD Writer Drive, SATA Blu-ray Writer Drive Expansion Bays : External: One (1) 3.5-inch, One (1) 5.25-inch, Internal: One (1) 3.5-inch Expansion Slots : One (1) low-profile PCI, One (1) low-profile PCI Express x16, Two (2) low-profile PCI Express x1 Graphics : Intel HD Graphics 2000/3000 (integrated) Audio : Realtek ALC261 codec Communications : Integrated Intel 82579LM Gigabit Ethernet I/O Ports : Rear: 6 USB, VGA, Serial, DP, 2 PS/2, audio in/out, Front: 4 USB, audio ports Input Devices : HP Standard Keyboard (PS/2 or USB), HP 2-Button Optical Scroll Mouse (PS/2 or USB) Power : 240W Dimensions : 43.1 x 37.7 x 17.7 cm Weight : 7.6 kg