today an usb hub pair (4-5) on one of my gekko hubs died and the two ports have no voltage anymore

on each of the two ports 1 gekkosience compac f (580mhz) stick and the corresponding fan were connected

I've had the same experience twice already.. seems to happen when the sticks are running at 500+ mhz.
The usb port just goes dead but the stick will keep working fine in a different port. I assume it has something to do with the amperage. I keep them around 425-475 Mhz now and they seem to be happier with that
Remember, on the old hubs the current limit per-pair of ports is 6A and each pair used their own (6A) regulator. My F running at 575 pulls 2.9-3A so only one per port pair. If you were running just 1 stick *something* overloaded that regulator feeding the ports...