Front I/O (x4) USB 2.0, (x1) USB 3.0, (x1) IEEE1394, (x1) Headphone, (x1) MIC Cooling (x2) 200mm Fans w/White LEDs, (x1) 120mm Fan Material Steel structure with molded ABS plastic accent pieces ?Twin 200mm cooling fans with white LEDs for excellent cooling ?Side panel with cutout for window AND mesh with room for four 120mm fans ? both included! ?Eight expansion slots provides you flexibility for multiple graphics card solutions ?Unique cable routing holes guarantees you a clean and clutter-free installation ?Integrated fan controller, for up to four fans, gives you the choice of noise vs. performance ?Tool-free optical drive installation makes building your system faster than ever ?CPU backplate cutout makes upgrading your CPU heatsink easy ?2.5? and 3.5? hard drive compatibility for up to 6 drives ? straight out of the box! ?Two year warranty with Corsair?s world-class customer service and technical support