Tom's Hardware > Forum > Graphic & Displays > Graphics Cards > Would PCIE 2.0 x 8 bottleneck a 4870?

Would PCIE 2.0 x 8 bottleneck a 4870?

Forum Graphic & Displays : Graphics Cards - Would PCIE 2.0 x 8 bottleneck a 4870?

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FiresOfGreed   06-23-2009 at 12:57:21 AM

Im looking into getting this MOBO: http://www.newegg.com/Product/Prod [...] 6813136055
But it only uses PCI-E 2.0 x 8 in crossfire, and I wanted to put two 4870's into my new build, so I'm worried about this bottlenecking the cards.

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g3force   06-23-2009 at 01:23:26 AM
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FiresOfGreed wrote :

Im looking into getting this MOBO: http://www.newegg.com/Product/Prod [...] 6813136055
But it only uses PCI-E 2.0 x 8 in crossfire, and I wanted to put two 4870's into my new build, so I'm worried about this bottlenecking the cards.


Read this: PCI Express & CrossFire: Scaling Explored
The majority of the tests show that bottlenecking on the 4870 in crossfire occurs on the last gen PCI-E 1.1 slots, but not on the PCI-E 2.0 slots. The difference between x8 and x16 link speeds on the 2.0 slot is negligible.

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