hey i just bought a usb hub for my mac because i needed one for my sound card my vci and my midifighter and i was trying it out using my vci and midifighter and i worked for about five minutes and then my controllers stay lit but no buttons changed color and they did nothing i later looked at the box and noticed it said that it had a 480 mbps rate and i was wondering if that was the problem and if so how much do i need to run all of this?