Product Name SPIRIT Dimension (W) 195 x (H) 485 x (D)505 mm Drive Bay 5.25" External x 2 (Both side tool-free holders) 2.5" Internal x 4 ; 3.5" Internal HDD x 4 Expansion Slot 7 slots Motherboard Support ATX, Micro ATX, mini-ITX (with backside hole for CPU cooler) Power Supply Standard P/S2 ATX/EPS power supply units on downside space with anti- vibration rubber. Cooling System AIR COOLING Front Fan: 200mm or 140mm or 120 fan x 2 optional Rear Fan: Preinstalled XOF black/black blade fan 120mm fan x 1 optional 80mm x 1 Bottom Fan: 120mm fan x 1 optional Top Fan: 120mm fan x 2 optional or 140mm x 2 optional I/O Panel Front panel I/O : Reset button, USB3.0 x 2, USB2.0 x 2, Audio in/out x 1 (HD Audio) CPU Cooler 160mm height support Max GPU length 300mm Additional features Display card retainer