DESC: The NEW DimensionTM 5150 features a new stylish BTX chassis enabling quiet operation and cooling efficiency. It also provides an Intel® Pentium® 4 processor with HT Technology that can handle many productivity and multimedia applications simultaneously. Your choice of Genuine Windows® XP operating systems. Two front USB 2.0 ports, a headphone jack and a microphone jack encourage plug and play, and an optional 13-in-1 media card reader and an additional 5 USB 2.0 ports in back welcome an assortment of peripherals.