Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel G41 Processors : Intel Core 2 Duo, Core 2 Quad, Dual Core & Celeron Memory Support : Two (2) DIMM slots , Up to 4 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 Blu-ray Writer Drive Expansion Bays : External: One (1) 3.5-inch, Two (2) 5.25-inch, Internal: Two (2) 3.5-inch Expansion Slots : Two (2) PCI , One (1) PCIe x16 Native Graphics : Integrated Intel GMA X4500 Audio : Realtek ALC269Q High Definition Audio Codec Communications : Broadcom (BCM57780) Gigabit LAN 10/100/1000 (WOL, PXE) I/O Ports : Front: Two (2) USB, microphone, headphone, Rear: six (6) USB,Stereo line in, Speakers line out, Serial, Parallel, VGA, DP, eSATA,RJ45 Input Devices : Standard Keyboard, Mousel (USB) Dimensions : 43.3 x 40.8 x 18.7 cm Weight : 12 kg