Technical Specifications Carbide Series: Side panel with mesh fan mount locations Four 5.25” drive bays Six 3.5” hard drive bays with 2.5” compatibility Eight expansion slots Supports most 240mm dual radiators (15mm spacing) Two-year warranty Front I/O panel contains: Two USB 3.0 connectors One Firewire connector 3.5” headphone and microphone connector Power and reset switches Fan LED on/off switch Carbide Series 500R: Dimensions: 20.5” x 8.1” x 20” Supports graphics cards up to 452mm in length (with hard drive cage removed) Multi-channel fan controller Six 120mm/140mm fan mounts Four 120mm fan mounts Includes a 200mm side panel fan, two front-mounted 120mm fans, and one rear 120mm fan