Operating System : Windows 10 Home & Pro MAR Chipset : Intel Q65 Processors : Intel Core i3,i5.i7 2nd Gen Memory Support : Four (4) DIMM slots , Up to 16 GB DDR3 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 Combo Drive CD-RW 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 : Intel HD Graphics 2000 Audio : Realtek ALC269Q High Definition Audio Codec Communications : Intel 82579LM Gigabit Ethernet I/O Ports : Front: Four (4) USB, microphone, headphone, Rear: Six (6) USB,VGA, DP, RJ-45, Serial, Stereo line in, Speakers line out, PS/2 Input Devices : Standard Keyboard, Mouse (PS/2 or USB) Power : 250W Dimensions : 41 x 36 x 10.2 cm Weight : 7.56 kg