Hi guys. Newbie here. Just bought a ifi iUSBPower yesterday at the montreal sonℑ show and am very happy with all it brought to the table. Since i use it connected to a SOtM USB PCI card i assumed that switching off the power switch on the PCI card would have been benificial or at least wouldn't have made any difference since the iPower is supposed to provide the power. But to my surprise leaving the power switch on gives far better results. Wanted to know if some of you with a similar setups experienced the same thing. thx