STARTECH PS4C3IA3-USB-C-CARD 5-port USB 3.2 10Gbps PCIe 3.0 x4 expansion card

5-port USB 3.2 10Gbps PCIe 3.0 x4 card

This expansion card adds four external USB-C ports and one internal USB-A port to a desktop or server using a single PCIe 3.0 x4 slot. It is built around the ASM3142 controller, which supports up to 10Gbps bandwidth shared across all five ports. The card works with Windows, macOS and Linux on Intel, AMD and Apple Silicon platforms. It suits users who need high-speed USB-C connectivity for external drives or peripherals.

Installation ease and common issues

The card installs into any available PCIe 3.0 x4 slot and draws power from the bus, so no extra power cables are required. Driver support is native in modern operating systems, making setup straightforward for most users. A frequent issue is reduced throughput when multiple high-bandwidth devices are active simultaneously, because the 10Gbps total is shared. Another common oversight is connecting the card to a PCIe 2.0 slot, which halves the available bandwidth.

Pre-order checklist

Verify that your motherboard has a free PCIe 3.0 x4 slot that is electrically wired for at least four lanes; some chipsets only provide x1 or x2 on secondary slots. Confirm that your operating system version includes built-in support for the ASM3142 controller to avoid driver hunts. Check whether your case bracket has room for the four external USB-C cut-outs, as low-profile brackets may not fit. Ensure internal USB-A header clearance if you plan to use the internal port.