Hello everybody. Recently I resurrected an old PowerMac (Dual G5@2.0GHz) by installing 4GB of RAM (it wasn't really dead, just somewhat slow), and after adding another HDD I realized the USB 2.0 ports in it would be a limitation for data transfers, so I devised the idea of adding USB 3.0 ports. When I opened the case to upgrade the RAM I noticed the existence of several PCI slots on the motherboard, they are available for expansion, aren't they? Assuming they are and that I manage to get a PCI expansion card with USB 3.0 ports, would it work on the machine? I mean, would "Leopard" detect them? So far the cards I've seen say they only support Windows (but that could be marketing). Thanks, Joe.