Xbox One wireless controller and Xbox 360 wireless controller for PC power requirements

Hi,

I have been reading about these controllers. As to use power to transmit is there any indication on how much power is required from the USB ports. I don't think my ports are powered ports.


GA-MA78GM-US2H
https://www.gigabyte.com/Motherboard/GA-MA78GM-US2H-rev-10#sp

Is something like this necessary?
http://www.manhattan-products.com/hi-speed-usb-pci-card2

Could they work in standard USB 2 ports - non powered ports?

How much power should they draw.

Thanks,

Ward.