In an attempt to add more, cheap, fast HD capacity to my Xserve I've bought a PCIe USB3 card from ORICO. Now I find it needs an external source of +5V to work properly, or at all. The PCIe slot doesn't supply +5V, only +3.3V and +12V. I suppose they could have derived +5V from the +12V but opted to cost-shift onto the user instead. Or maybe the current draw of bus-powered USB HDDs was beyond the PCIe's capacity; all my USB3 drives are self-powered. So, does anyone know where I could tap into a safe source of +5V on an Xserve 1,2 or 1,1?