In Win BL631 SFF mATX Slim case with IP-S300FF1-0 H Haswell Ready power supply, USB 2.0 x 4, HD audio, Air Filter Motherboard Compatibility: MicroATX Front Ports: USB 2.0 / Audio Power Supply Mounted: Bottom With Power Supply: Yes External 5.25 Drive Bays: 1 External 3.5 Drive Bays: 1 Internal 3.5 Drive Bays: 2 Expansion Slots: 4 x Low Profile Slots |