Dell Inspiron 3847 Desktop (Windows 7 Professional, Intel Quad Core i5-4460 up to 3.4GHz, 12GB DDR3, 1TB HDD) Windows 7 Professional, 64Bit, English. Best Operation System for Business and Home Use. Intel Core i5-4460 Processor 3.2GHz up to 3.4GHz Turbo Frequency, 6MB Cache , 12GB DDR3 (8GB+4GB 1600MHz), 1TB 7200 rpm Hard Drive Intel HD Graphics, Tray load DVD Drive (Reads and Writes to DVD/CD), 2 USB 3.0, 4 USB 2.0, HDMI DW 1705 802.11bgn + Bluetooth 4.0, 2.4 GHz, 1x1, Integrated 5.1 Audio, Inspiron 3847 Chassiss, MT, Black w/8:1 media card reader, Dell KB113 Wired Keyboard, Dell MS111 USB 3-Button Optical Mouse