Xserve: where can I get +5V?

Discussion in 'Mac OS X Server, Xserve, and Networking' started by warragul, Sep 21, 2016.

  1. warragul macrumors member

    Joined:
    Sep 19, 2016
    Location:
    Melbourne, Australia
    #1
    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?
     
  2. jamall macrumors regular

    Joined:
    Jun 9, 2003
    Location:
    Canberra, Australia
    #2
    Seeing as nobody else chimed in, the most obvious source of +5V would be one of the existing USB slots. You'd have to modify a cable and have it double back inside the chassis through one of the ventilation holes, but it would be a fairly simple hack.
     
  3. warragul thread starter macrumors member

    Joined:
    Sep 19, 2016
    Location:
    Melbourne, Australia
    #3
    'Doh! Obvious indeed. Thanks for making me feel like an idiot, jamall. :)
    Of course, there's only 500mA available there but it should be enough, as long as I use self-powered peripherals.
    Should be able to tap it off the back of the socket, rather than using an external plug
    Thanks again.
    The whole thing has been rendered moot, though. I can't find a driver for the cards I have, although I have a driver for a 0194,1033 card installed in an earlier (1,1) Xserve. All the chatter these days is about drivers for recent versions of OSX Server and I'm stuck with the 32-bit EFI that limits me to older versions. Perhaps more research on SFOTT is in order.
     

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