PCI Express bus link sharing

Discussion in 'The Projects Forum' started by Melchior, Jan 10, 2010.

  1. Melchior

    Thread Starter New Member

    Feb 2, 2008
    Very technical question; I hope someone here can understand this:

    Can a 16x link PCI-Express bus lane be used as 16 separate lanes directly?

    Does the PCI-Express Bus controller expect a 16x link, as a single lane ?

    Or does the protocol automatically negotiate each link into a single lane?

    In short: Can a 16x link PCI-Express bus slot be used for 16 separate PCI 1x devices,
    WITHOUT a PCI-Express switch chip (or any extra chips)?
  2. kubeek

    AAC Fanatic!

    Sep 20, 2005
    According to the wiring of the slots it should be possible. http://pinouts.ru/Slots/pci_express_pinout.shtml
    First you can try to wire two 1x cards like network card into a single 2x or bigger slot and see what happens. Just split the power and connect the differential pairs. And let us know if it worked