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Please Explain Video Card Speed on Motherboard....

Last year I bought a motherboard that runs one pci-e video card at 16x speed or two cards at 8x speed each. What exactly does this mean in terms of video card performance?

Specifically - does this mean that two video cards running at 8x will only perform the same as one card running at 16x???

Thanks.
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  1. No, Almost all graphics cards will not saturate an x8 PCI-E lane

    So say for example 2 x HD6850's in Crossfire in 8x/8x configuration will perform almost identically to the same cards in 16x/16x configuration.

    The only cards that would use up a 8x lane would be extremely high end cards like a GTX480 or HD5970
  2. Ok thanks. I just wanted to make sure running two cards on my board will definitely be better than running one card. I understand now that running two cards at 8x speed each isn't as fast as running both at 16x speed but still better than running one card at 16x speed.
  3. Best answer selected by mattd860.
  4. This topic has been closed by Mousemonkey
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