If by "power hub" you mean a USB hub that has an external power adapter, then it won't work. The hub will still receive power from the computer and the external power adapter is only to provide additional power if needed, so you'll have to unplug and replug the USB hub as you switch games, which can get really tedious.

Instead, pick up a USB hub that has on/off switches for the ports:

https://www.amazon.com/s?k=usb+hub+switches&ref=nb_sb_noss_1

This way you can keep the hub connected to the PC, then turn on/off the ports as needed. I use this 13-port hub that has 2 buttons that controls 6 ports each. It's a little more convenient than the ones with a switch per port:

https://www.amazon.com/gp/product/B00HL7Z46K/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1