Product Specification Brand:         SilverStone Technology Motherboard Compatability: SSI Color:         White, Black Cooling Method: Air Item Dimensions LxWxH: 17.56 x 16.93 x 6.93 inches Number of USB 3 Ports: 1 Hard Disk Form Factor: 3.5 Inches Fan Count:         2 Supports up to SSI-CEB motherboard Supports Standard profile PCI / PCIe x 7 slots Six 5. 25" drive bays for flexible 5. 25" device installation 5Gbps Super Speed USB 3. 1 Gen 1 interface, backward compatible with USB 2. 0 / 1. 1 Mounting holes ready for quick rail slide installation (rail slide sold separately) Product Description SilverStone’s RM41-506 is a higher performance server chassis designed for the professional environment. It is equipped with six 5.25” drive bays, room for ATX/PS2 or Mini Redundant power supplies, and motherboard support up to SSI-CEB. Front I/O ports are upgraded to USB 3.1 Gen1 specification and two PWM fans (80mm rear) are included to keep up with modern computing conveniences. As an overall package designed for maximizing efficiency, flexibility, and durability, the RM41-506 is a great choice for professionals or data center engineers looking to build a server.