MB Form Factor: MicroATX External Bay: 1 x 5.25', 1 x 3.5', Internal Bay: 2 x 3.5', 1 x 2.5' Expansion Slots: 4 x Low Profile Expansion Slots Front I/O Panel: 4 x USB 2.0, HD Audio Power Supply: 300W Standard TFX 12V Power Supply (Support Haswell)