Structure: Standard 19 "on posture, all steel structure, 1.2mm SGCC, USB connection,6 springs absorption apparatus, front strap lock; Color: Black, white, iron grey, silver; Dimensions: 480*530*180mm(W*L*H) Motherboard: 12 "?3"; Driver Space: 5.25 "?; 3.5 "?(FDD); 3.5 "?(HDD) Cooling Fan: 2025?, 8025? (Optional); Expansion Space: 7 PCI expansion slots; Alarm System: 0.4W speaker or buzzer; Safe Authentication: FCC CE; Selects Power: ATX300W, 350W, 400W;EPS350W、 400W、460W.