>>284186198
you pretty much have to get a pci-e expansion card. I don't think any motherboards have enough usb controller bandwidth to the cpu on their own.
FWIW some mobos do have more _ports_ in the form of usb2/3 pin headers. They usually connect to extra ports on the front of your case, but you can also buy cheap adapters for those to add more ports in your extra pci slots, or in a 5.25" bay. You won't magically get more bandwidth that way though, only ports.