ㆍ PCIe x4 Gen2 interface ㆍ 8 USB 3.0 ports ㆍ 4 Independent USB 3.0 Host Controllers ㆍ User-configurable 900mA and 1500mA current limit ㆍ Supports Windows XP/7/8 and Linux ㆍ Compliant with USB 3.0 specification Rev. 1.0 and Intel® xHCI specification Rev. 1.0 ㆍ Software-programmable per-port power on/off control (by request)