PCIe X1 to 4 Port USB 3.0 Expansion Card with MSC9990 Chipset, Internal Desktop USB Adapter with 4-Pin Auxiliary Power Supply

This internal PCIe USB 3.0 expansion card adopts mature MSC9990 control chip, which efficiently expands four independent USB 3.0 ports via a single PCIe X1 slot of the desktop motherboard, solving the problem of insufficient onboard USB interfaces. Each port supports a maximum transfer speed of 5Gbps, meeting daily demands of U disks, external hard drives, cameras and USB peripherals.

Different from low-power expansion cards without extra power supply, this card reserves a 4-pin power interface connected to the PC power supply. It provides sufficient stable current when multiple power-hungry devices such as portable SSDs are used at the same time, effectively preventing device unrecognition, disconnection or slow transmission caused by inadequate bus power.

The integrated metal shielding structure reduces electromagnetic interference from graphics cards, CPU and power supplies inside the chassis, maintaining stable signal output during long-term continuous use. It is matched with a universal full-height metal baffle, which can be directly mounted on standard desktop chassis without modification.

It supports all mainstream Windows operating systems and Linux systems. After installing the matching driver, all four USB ports can be independently identified and work without bandwidth conflict. Ideal for office hosts, live streaming workstations, design computers and industrial control desktops that require extra high-speed USB expansion ports.