Available at Lenovo official store, Lenovo IdeaCentre K300 53161EU Intel Core 2 Quad 2.50GHz Desktop PC features Tower form factor, Intel Core 2 Quad Q8300 2.50GHz quad-core processor, 8GB DDR3 RAM, 1TB SATA 7200rpm hard drive, DVD burner, ATI Radeon HD4650 graphics card with 1GB dedicated video memory, TV tuner w/ 4-in1 remote control, more. Comes with Windows 7 Home Premium 64-bit OS installed.