I to have similar issue with AOC monitor and my new usb graphic card.
It was all working find the last few days and yesterday it flickered while dragging something and 1 of the AOC monitors seem to freeze, all 3 of the other monitors flickered and then I was down to 3 monitors working..
If I unplug the usb cable and reconnect, everything works for a few minutes and then that one flickers and freezes again and everything goes back to a 3 monitor setup.
Is there any additional configuration that is needed when installing multiple of the same usb cards? I mean they do show up in the task bar as unique devices.. is it the monitors that don't work well with the cards?
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