Supermicro Rack Mount Server Chassis CSE-505-203B 9.8"-Depth Mini 1U chassis support for maximum motherboard size - 6.75" x 6.75" Mini-ITX Single Processor Support Drive Bays: 1x 3.5" Internal Drive Bay (w/ 1x Half-height Half-length PCI Slot) or 2x 3.5" Internal Drive Bay or 2x 2.5" Internal Drive Bay (w/ 1x Full-height Half-length PCI Slot) or 4x 2.5" Internal Drive Bay Expansion Slots: 1x PCI Slot (Full-height, Half-length) Power Supply: 200W 80 PLUS Gold Certified Low Noise AC-DC Power Supply w/PFC I/O Ports: Standard System I/O (Mouse, Keyboard, 2x USB Video, COM, LPT, LAN) 9.8"-Depth Mini 1U chassis support for maximum motherboard size - 6.7" x 6.7" Single Processor Support Up to 1x full-height, half-length PCI expansions slot OR 2x 3.5" Internal Drive Bay, OR 2x 2.5" Internal Drive Bay with 1x Full-height, Half-length PCI, OR 4x 2.5" Internal Drive Bay Power Switch, Reset Button and 5x LED Indicators Only SAS or enterprise SATA HDD recommended