PCIe to USB 19pin 3.0 Expansion Card Function and benefits Small PCIe expansion card that provides a 19pin USB 3.0 internal header for convenient front panel or internal USB 3.0 connections in compact systems. Empowers USB 3.0 performance in builds where the motherboard lacks or lacks adequate internal USB 3.0 headers. Compact form factor designed for small space PC builds without sacrificing USB 3.0 connectivity. Performance On PCIe 1.0, the expansion card can reach around 140M/S. On PCIe 2.0, performance can reach over 300Mbps. Power and compatibility Power input options include a small 15pin PCIe style connector or a floppy drive 4pin power supply. Compatible with PCIe standard slots. It must be plugged in to work when in use. Practical attributes Small and space efficient, suitable for mini PC cases, ITX builds, or other tight installations. Maintains a straightforward, reliable connection to internal USB 3.0 devices via the 19pin header. Use scenarios Scenario 1: Add USB 3.0 support to a compact or mini PC that lacks an internal USB 3.0 header, enabling frontpanel USB 3.0 ports. Scenario 2: or supplement an absent or insufficient USB 3.0 header on a home or office build, improving USB 3.0 device compatibility and speed. Scenario 3: Quick upgrade or create a test bench setup where USB 3.0 connectivity is needed without modifying the motherboard or its headers. Notes 1: Can only be used with PCIe standard. It must be plugged in to work when in use.