I actually have tried 2 different powered usb 2.0 hubs with no difference. On this board, the manual specifically states that all usb 2 and 3 ports are controlled by the xHCI controller - and the bios has no option to disable that. That seems to be a fix with people having issues with the X52/56 stuff - although it reverts all ports to usb 2.0 speeds. Without a powered external port a lot of newer PCs won't even recognize that these are plugged in. FSX, 2020, IL2, squadrons all work fine.