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Old September 29, 2011, 11:59 AM
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Linus Linus is offline
 
Join Date: Apr 2007
Posts: 716
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Unfortunately you can only set up SLI between cards with the same GPU configuration.

For example, you can configure 2x GTX 580 in SLI even if one of them is MSI and the other one is EVGA, but you cannot configure them in SLI if one is GTX 580 and one is GTX 570.

CrossfireX is a little bit more flexible. As long as they are built on the same architecture, they can run in CrossfireX. For example, a 6990 can run with a 6970 in 3-way CrossfireX, and a 6970 can run with a 6950 in 2-way CrossfireX.
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