On "business class" PC's, is it safe to assume the USB2 ports (front and back -- typically 4 or 5, total?) are handled by one controller and the USB3 ports by another?
And, more specifically, that power supplied to the devices in each class are handled independant of each other? (i.e., USB3 having more power delivery capability than USB2).
Finally, is the power handling done with external (to the controller) FETs or passed directly through (particularly on the USB2 ports)?
SWMBO's legacy desktop has developed a power problem with the USB2 ports (front and back). If power is passed internal to the controller, then it's just not worth my time to even open the case...