The Grandia GD04 is an incredible product that combines years of SilverStone expertise in SFF (Small form factor) and HTPC (Home Theater Personal Computer) chassis design. It has a beautifully proportioned exterior and powerful thermal capability that rivals the best tower chassis. From the front, the GD04 is shaped similarly to most home theater components, but the depth was reduced to a mere 323mm. This overall size of 21.5 liters in volume actually makes the case one liter smaller than SilverStone’s own Micro-ATX Sugo cases! Even though GD04’s diminutive size allows it to easily integrate into any home theater cabinet, it can still accommodate an impressive list of standard components such as 5.25� optical drive, two 3.5� hard drives, a 2.5� SSD, a standard ATX power supply, and two high-end graphics cards up to 11 inches. Cooling duty in the GD04 is handled by three filtered 120mm fans designed with the same positive air pressure as the Fortress FT01, this enables class-leading cooling efficiency, red Power Supply: No Motherboard Compatibility: Micro ATX External 5.25" Drive Bays: 1 Internal 3.5" Drive Bays: Internal: 3.5" x 2 , 2.5" x 1 or 3.5" x 1 , 2.5" x 2 Expansion Slots: 5 Front USB Ports: Yes Front Audio Ports: Yes 120mm Fans: 2 x 120mm right side intake fans 1 x 120mm left side intake fan