Small PCIE to 19PIN USB3.0 Expansion Card Function: compact PCIE expansion card that adds an internal 19pin USB 3.0 header for higher speed internal USB connectivity. Power options: supports 15pin PCIe power or a small 4pin power supply to ensure stable operation. Controller: uPD720202 for USB 3.0 performance and compatibility. Compatibility: works with Windows operating systems including XP, 2003, 2008, 7, 8, 10, and 11, 32bit and 64bit editions. Performance: on PCIE 1.0 slots, speed is around 140 MB/s; on PCIE 2.0 slots, speed is over 300 Mbps. Size and form: small PCIe form factor designed for compact builds and small form factor systems. What makes it stand out: provides internal USB 3.0 expansion from a PCIe connection with specific power options and broad Windows compatibility, suitable for upgrading legacy or compact systems. Use scenarios: 1) Upgrade a compact PC, HTPC, or embedded system that lacks a USB 3.0 internal header by adding internal USB 3.0 connectivity. 2) Extend USB 3.0 support in miniITX or small servers, allowing faster internal connections to USB devices and enclosures. 3) or augment USB 3.0 capability in industrial or small form factor PCs that use Windows 32/64bit environments and require reliable USB 3.0 performance. Notes: retains the original product's specifications, model references, and functionality without added features.