In Win BK644.BN300TBL Micro ATX Case with 300W Power Supply M/B Form Factor: Micro ATX Drive Bays: External 5.25" x 1, 3.5" x 1; Internal 3.5" x 1 Front Ports: USB 2.0 x 4, HD Audio x 1 Power Supply: SFX 12V form factor, 300W Full Height Slots x 4