What means by PCI Express 2.0 x16 : 1 @x4

What means by PCI Express 2.0 x16 : 1 @x4
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  1. This means that a graphic card that will be installed on that slot will have only a quarter of the bandwidth of a card on a Express 2.0 x16 @x16 slot. Your motherboard probably has 2 PCI Express 2.0 slots, if you will put 2 graphic cards in both of them, one will run @x16 and the second will run @x4.
    More on this subject in this thread: http://www.eggxpert.com/forums/thread/826549.aspx
  2. Its not really designed to run 2 GPU's, but u can use audio card,

    wireless adapter or any other PCI card.
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