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What is the meaning of this.

As pertaining to this - http://www.newegg.com/Product/Product.aspx?Item=N82E16813131837

PCI Express 3.0 x16 - 2 (x16/0 or x8/x8)

I was planning on running SLI in the future. Will x8/x8 affect the performance? Does that mean that each card will run at 1/2 the PCI-e 3.0 bandwidth?
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More about what meaning this
  1. x8/x8 3.0 is just fine for SLI (that's x16/x16 2.0, but even x8/x8 2.0 would be fine).

    It would only be a problem if one of them was x4. SLI can't be enabled if one of the GPU's is in a x4 slot.
  2. The graphics card is GTX 670 and it's pci-e 3.0. Does that make a difference or no?
  3. Best answer
    phunky_21 said:
    The graphics card is GTX 670 and it's pci-e 3.0. Does that make a difference or no?

    No. Assuming you have an IB CPU you're effectively doubling the PCIe bandwidth as @DJDeCiBeL stated. Even x8/x8 PCIe 2.0 on ANY HD monitor isn't even remotely close to saturation regardless of what settings including any AA setting.

    /edit see - http://www.techpowerup.com/reviews/Intel/Ivy_Bridge_PCI-Express_Scaling/
  4. Yes I have Ivy bridge. i7 3770 3.5ghz. I remembered reading something about ivy bridge only being compatible with the pci-e 3.0 that's one of the reasons that pushed me towards getting it. That was a good link thanks.

    /edit: Those aren't SLI though are they? Does it make any difference in SLI?
  5. For SLI only the GTX 600 series + IB + PCIe 3.0 MOBO = PCIe 3.0 otherwise you're running PCIe 2.0 on say a GTX 500 series or before.

    Single HD Monitor: SLI or CF PCI Express 3.0 x8/x8 vs PCI Express 2.0 x8/x8 no differences in performance; see my prior link.

    It takes 4-WAY SLI GTX 680 + Multiple Monitors + High Details + High AA = to see any discernible differences.
  6. Best answer selected by phunky_21.
  7. This topic has been closed by Nikorr
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