Summary: I bought one of these to add USB 3.0 capability to my homebuilt PC. Install was easy, just need a free PCIe slot. Recognized by Win7 and drivers installed OK. Would not allow any USB device to connect. I had to buy a Molex (4 pin) to SATA power cable, and it now works. It would be nice if the power cable was part of the package. Add it to you cart and make your life easy.