USB 3.0 PCI-E 1 to 4 PCI-Express 16X Slots Adapter CardSpecification: Name：PCI-E 1 TO 4 PCI-E USB CARD Chip：ASM1184e Size：120 x 55 x 75 mm(Refer to the last product display picture) Material：Premium Aluminum Heat Sink Bus interface: PCI-E x 1 (compatible with 4x / 8x / 16x graphics card interface) Compatible system: WinXP / Win7 / Win8 / Win10/Win XP/DOS / Linux. Features： Effectively solve the motherboard PCI-E interface is not enough, one interface can be expanded to 4 interfaces. Adopting a plug-in design, it can be directly connected to the motherboard interface without an extension cable, and it can be fixed to the chassis, which greatly improves the stability and reliability. The main control board adopts the PCI-E interface for direct power supply, no external power cord is required, so that the main control board power is not affected by external interference and has higher stability. Reduce the number of adapters and adapter cables, one wire directly to the interface, effectively reducing interface interference and wire loss, ensuring data reliability, and improving work efficiency. The USB connector is gold-plated, which reduces interference between interfaces and enhances data integrity. Note： The 4 USB3.0 ports on this adapter card are PCI-E signals, not USB signals, and cannot be connected to USB devices MZHOU provides quality products and pre-sales and after-sales services to Amazon buyers.Please feel free to contact us if you have any questions! Your support will make us do better!