Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q77 Processors : Intel 3rd generation Core i7/i5 Quad Core, i3 Dual Core and Pentium Dual Core, Intel 2nd generation Core i3 Dual Core, Pentium Dual Core Memory Support : Four (4) DIMM slots , Up to 32 GB DDR3 1600 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) 5.25-inch, Internal: One (1) 3.5-inch Expansion Slots : One (1) PCIe x16, One (1) PCIe x16 (wired x4), One (1) PCIe x1, One (1) PCI (LP) Graphics : Integrated Intel® HD Graphics 2500/4000 (3rd G), 2000/3000 (2nd G) Audio : Realtek ALC269Q High Definition Audio Codec Communications : Intel 82579LM Gigabit Ethernet LAN 10/100/1000 I/O Ports : Front: Four (4) USB, microphone, headphone, Rear: Six (6) USB, Stereo L/I, Speakers L/O Input Devices : Dell USB Entry Keyboard, Dell USB Multimedia Pro Keyboard Dell USB Entry Optical Mouse, Dell Laser Mouse Power : 250W Dimensions : 360 x 102 x 410 mm (14.17 x 4.02 x 16.14 in) Weight : 7.9 kg, 17.38 lbs