GIGABYTE Poseidon, Midi Tower, PC, Silver, ATX, micro ATX, Aluminium, SECC, 200 mm GIGABYTE Poseidon. Form factor: Midi Tower, Type: PC, Product color: Silver. Width: 200 mm, Depth: 495 mm, Height: 440 mm. Ventilation fan(s): 120mm x 2, Internal drive bays: 3.5" x 4, External drive bays: 5.25" x 5, 3.5" x 1