The other issue is that certain usb 2.0 interfaces dont function well through a usb 3.0 port. ie Presonus 1818 which I have and can verify. I built my dedicated audio computer with a motherboard that was heavy with 3.0 ports thinking faster is better. I have to plug my interface into the 2.0 usb on the front of my case. It works and the interface is great but wish I knew 3.0 wasn't that important in audio when I built it.

If I build again I will try to stay with 2.0 however the balance of 2.0 to 3.0 usb ports is flipping to favor the 3.0 speed.