The p100 is an atx case that epitomizes cool quiet and sophistication it features the performance one series design and quiet computing technologies that minimize system noise in addition to 7 expansion slots the p100 also supports 2 tool less 525 drives and 7 tool less 3525 drives a balance of price and 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