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Crossfire with 16x and 8x PCI-E slots?

Im building a new computer for myself this summer, and I only have enough for one 5770.
Somewhere down the road I may go crossfire for when More GPU intensive games come out.

Can I do Crossfire with two different speed PCI-E slots?
(16x and 8x)

There will obviously be a performance bottlenecks with that, but is it even possible in the first place.
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  1. Best answer
    Yes, you can definitely crossfire with two different speed slots. Not that it'll matter with 2 5770s as they're probably not going to see much performance hit (if any) even being run in an 8x8x configuration.
  2. Best answer selected by Ninelivesproductions.
  3. Thanks for the help! I actually wonder if I'll ever need to buy another one....
    By the time I need to they'll only cost $100 ahah.
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