The P100 is an ATX case that epitomizes cool, quiet, & sophistication. It features the Performance One series design & Quiet Computing technologies that minimize system noise. In addition to 7 expansion slots, the P100 also supports 2 tool-less 5.25 drives & 7 tool-less 3.5/2.5 drives. A balance of price & feature is achieved by integrating Antec design with superior build quality. Engineered with Quiet Computing technology, the P100 is truly in a class all its own.