Motherboard Compatibility: 12" x 13" E-ATX Power Supply: 500W External 5.25" Drive Bays: 3 Hot-Swap Drive Bays: 8 x 3.5" SAS/SATA Expansion Slots: 7 x Full-height, Full-length PCI expansion slots Front Ports: 2 x USB Dimensions: 25.5" x 17.8" x 7" Features: Processor Support: Supports dual, single Intel / AMD processors. SAS or enterprise SATA HDD only recommended SAS / SATA Hard Drive Backplane Buttons: Power On/Off button System Reset button LEDs: Power LED Hard drive activity LED 2x Network activity LEDs System Overheat LED Power Fail LED Fans: 4 5000 RPM Hot-swap PWM Cooling Fans Chassis intrusion switch