The new flagship in Antec's Gaming series, the Eleven Hundred, brings ultimate gaming builds to life. The Eleven Hundred's nine expansion slots and space for an XL-ATX motherboard accommodate elite GPU configurations up to 3-way NVIDIA® SLI® / 4-way AMD CrossFireX™. An included top 200 mm exhaust fan, rear 120 mm fan and up to seven more optional fans in strategic positions - including behind the motherboard tray - keep all your components comfortably firing on all cylinders. The Eleven Hundred also lets you organize a clean, powerful build with superior cable routing, including 36 mm of space behind the motherboard tray and grommet-lined cable routing holes. For me details goto http://www.antec.com/product.php?id=704505&fid=4&lan=us