The GS1000 is designed for optimal airflow on both intake and exhaust. The ventilated floor panel helps cool the PSU and other components. The optional 120mm fan ports will allow additional fans to further enhance cooling performance. The top vent coupled with a 120mm fan are very effective in exhausting hot air. The optional 120mm fan ports will allow additional fans to further enhance cooling performance. Manufacturer: Zalman Tech Co., LTD Manufacturer Part Number: GS1000-T Manufacturer Website Address: Brand Name: Zalman Product Model: GS1000 Product Name: GS1000 Chassis Product Type: System Cabinet Motherboard Support: ATX Motherboard Support: EATX Motherboard Support: Micro ATX Number of Fans Support: 5 Number of Fans Install: 2 Number of External 5.25" Bays: 4 Number of Internal 3.5" Bays: 6 Number of Total Bays: 10 Number of Expansion Slots: 7 Front USB: Yes Front FireWire: Yes Front Audio In: Yes Front Audio Out: Yes Interfaces/Ports: 1 x Audio Out Front Interfaces/Ports: 1 x IEEE 1394 FireWire Front Interfaces/Ports: 2 x USB 2.0 USB Front Interfaces/Ports: 1 x Audio In Front Number of Power Supplies Support: 1 Material: Aluminum Material: Plastic Form Factor: Full-tower Dimensions: 22.44" Height x 10.24" Width x 25.20" Depth Weight (Approximate): 26.46 lb