Drive bays: 1 x 5.25-inch CD-ROM, 1 x 3.5-inch FDD, and 6 x 3.5-inch HDD Expansion slot: 8 PCI Mother Board Support: 12"×9.6" in max Cooling fans: 4 x 8025(STD) Steel thickness: 1.0 or 1.2mm Riser card: 3 to 3 32-bit PCI (optional) USB port: 1 USB 2.0 in front panel Colors: black PSU: A2462007/A2512407PS(optional) Dimensions:427mm × 530mm × 88mm