Inateck Superspeed 4 Ports PCI-E to USB 3.0 Expansion Card - Interface USB 3.0 4-Port Express Card Desktop with 15 Pin SATA Power Connector, [ Include with A 4pin to 2x15pin Cable + A 15pin to 2x 15pin SATA Y-Cable ] (KT4001) SuperSpeed USB 3.0 supports transfer rates of up to 5Gbps - The actual transmission speed is limited by the setting of the device connected 4 USB 3.0 downstream ports for standard desktop PCs; Supports USB Hot Plug, Plug & Play; Support LPM, Low Energy Consumption; 15 pin SATA Power Connector to power USB devices from your PC power supply Backwards compatible with USB 2.0 and 1.1 devices; Operating System Compatibility: Windows XP/Vista/7/8 With quick and easy installation. All USB 3.0 PCI-E Cards require an external connection to the power supply of the PC in order to supply voltage to the USB buss