Chenbro RM31300-H 3U 26IN General Purpose Server Chassis Case Type: 3U Rackmount Material: 1.2mm SGCC M/B Type: Extended ATX (12"x13"), Support CEB1.0 M/B (Need Bracket) CPU Type: DP Xeon/ DP Opteron/ DP Nocona Drive Bays: External 6x 5.25", External 3x 3.5" Cooling System: 4x 80 mm middle fans Expansion Slots: 7 I/O Panel: 2x USB 2.0 Ports