Item Type: PCI?E Riser Card Product Material: PCB Colour: Black Bus Bandwidth: About 8Gp/s Applicable Slots: PCI-E X4/X8/X16 Working Temperature: 0-70℃ Parameters: PCI-E X4 Interface to USB Interface (USB Devices Are Not Supported), the Motherboard Only Needs to Have PCI-Express X4/X8/X16 Slots to Easily Expand, Plug and Play. Thick Gold Plated Gold Fingers, Using Heavy Gold Process, Good Conductivity, Anti Oxidation, Ensure Good Contact, and Provide Data Transmission Rate. 1、Pcie 1X to 4USB: Bus interface Pcie X1 (compatible with X4, X8, X16/graphics interface), one interface can be expanded to 4 USB ports, which effectively solves the lack of PCI?E interface on the motherboard. 2、Adopting Plug in Design: Directly connected to the motherboard interface for power supply, without extension cords, can be fixed on the chassis, stability and reliability are greatly improved! 3、Direct Power Supply: The main control board adopts the direct power supply mode of the PCI?E interface, and no external power cord is required.Make the main control board power free from external interference and higher stability! 4、Stable: Reduce the number of adapters and adapter cables, one wire directly to the interface, effectively reducing interface interference and wire loss ensure data reliability and improve work efficiency. 5、Applicability: The USB connector is gold plated, which reduces interference between interfaces and enhances data.Completeness. System support: for Windows XP/Win7/Win8/Win10/LNUX /D0S. 1 x Expansion Card 1 x Screw