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Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel G41 Processors : Intel Core 2 Duo, Core 2 Quad, Pentium & Celeron Memory Support : Two (2) DIMM slots , Up to 4 GB DDR3 SDRAM PC3-10600 (1066/1333 MHz)  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) PCI 2.3, One (1) PCI Express x16, Two (2) PCI Express x1 Graphics : Integrated Intel Graphics Media Accelerator 4500 Audio : Realtek ALC662 High Definition audio codec Communications : Realtek RTL8103EL 10/100 Fast Ethernet controller I/O Ports : Front: 2 USB, audio ports, Rear: 4 USB, VGA, RJ-45, audio in/out Input Devices : Compaq USB Standard Keyboard, Compaq USB Optical Scroll Mouse Power : 300-W Dimensions : 42.8 x 38.4 x 16.6 cm Weight : 10.2 kg