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Old 2 Weeks Ago   #1 (permalink)
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Default 8x vs 16x
Ilooking to buy a new mobo, is there that much of a diffrence in SLI if the PCI-e slot are 8 or 16?
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Old 2 Weeks Ago   #2 (permalink)
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Nope.
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Old 2 Weeks Ago   #3 (permalink)
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Not really. If you're talking about pci-e 2.0 8x, then you could even run a 5870 at 99% full speed on that.
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Old 2 Weeks Ago   #4 (permalink)
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8x 2.0 = 16x 1.0

If the card you are getting with SLI/CF aren't monster powerful, they won't be bottlenecked.
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Old 2 Weeks Ago   #5 (permalink)
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So it really doesn't matter on pci-e 2.0 if it 8x or 16x for the SLI
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Old 2 Weeks Ago   #6 (permalink)
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Originally Posted by KEITHRH12 View Post
So it really doesn't matter on pci-e 2.0 if it 8x or 16x for the SLI
Not for 9800GTX+'s at least.
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Old 2 Weeks Ago   #7 (permalink)
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The first cards to majorly bottleneck x8 PCI-e 2.0 slots will be the 59XX cards. If you have a 5870 or worse, it will not bottleneck in an x8 slot.
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Old 2 Weeks Ago   #8 (permalink)
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Newer graphics cards may bottleneck PCI-e 2.0 8x. Current cards do not really get bottlenecked.
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Old 2 Weeks Ago   #9 (permalink)
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So just buy a 8x board, wuold buying a 16x be a waste, or future proof. I probly buy 2 new Nvida cards anyways.
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Old 2 Weeks Ago   #10 (permalink)
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Originally Posted by lelouche View Post
Newer graphics cards may bottleneck PCI-e 2.0 8x. Current cards do not really get bottlenecked.
The 5870 bottlenecks on x8 slightly

http://www.anandtech.com/mb/showdoc.aspx?i=3649&p=7
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