Gentlemen - I have a Dell dimension 5150 desktop running with Windows 7 that had a 3.5 disc drive. I replaced this with a 4 port usb 3.0 kit with an attached pci-e card. When I boot the computer the power light comes on for the device I installed. After inserting a usb 3.0 jump drive, when I check to see if it is recognized, it dosen't show up in the My Computer file. Is there something else I should  changing in the set-up program? I went in the set up  and SAW the pci-e slot recognizes the usb. Any help will be greatly appreciated. ThanksDid you install the drivers for the USB 3.0 PCI-e card?Yes, I installed the drivers from the disc that was supplied.In that case, there could be a problem on the usb jump drive itself. Another POSSIBILITY is that there is an ERROR on the USB driver. Check it by right-clicking My Computer>Properties>Hardware>Device Manager. Double check everything. ;-)I did as you suggested and everything was working except 5 items in the system devices. they showed no drivers installed. They are  1. direct memory access controller  2. intel 82801G (ich7 family)smbus controller -  27da  3. NUMERIC data processor  4. programmable interrupt controller and  5. system speaker an timer. I don't if one of these is causing the problem. The usb 3.0 jump drive works when it's in a usb 2.0 connection. Your help is very much appreciated -ThanksRe-install your MBoard Chipset drivers and re-boot.reinstalling the CD that comes with your computer will be able to help you.Stop parroting...Thanks for every ones suggestions. I tried them all and it still does not work. I have ordered a new pci-e card with 4 usb 3.0 ports. It that does not work, I will stay with usb 2.0 and sell all the other components on e-bay. Thanks again to all. Unless it was an el' cheapo Chinese knockoff card i can't see how it wouldn't work...

Best of Luck...let us know.Just to close this thread - I received the new pci-e card, installed it and loaded the drivers and everything works. Thanks all for your help, the problem must have  been with the other 2 devices I purchased.Good news indeed...glad you are fixed up.