How to get 3.0 x16 speed from video card ???

i got a asrock Z77 pro4-m motherboard the new gen3 i5 - 3570k , and a powercolor hd 7950 video card . now my mobo has 3.0x16 pcei slot, and my videoc card is 3.0 x16 bus interface , and the cpu is do i change the pcei link speed in my only has 2 option auto / gen1...if i got a board, video card , and gen3 cpu, shouldnt there be a gen2 or gen 3 speed option ?
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  1. Auto will negotiate the best speed common to both the card and the pci-e slot.

    But... It really is a non issue. The difference between pcie 2.0 and 3.0 speeds are detectable only with a synthetic benchmark, nor really by any noticeable difference in fps.
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