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Crossfire/SLI Question
http://mysterybyte.com/phpBB3/viewtopic.php?f=4&t=1076
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Author:  jdstew218 [ Wed Oct 15, 2008 1:58 pm ]
Post subject:  Crossfire/SLI Question

I was just wondering if in order to run 2 cards in Crossfire/SLI mode, do they have to be the same card? I know ATI - Crossfire and Nvidia - SLI but would I have to use the same ATI cards? Can I use two different ATI cards? What are the limitations on those cards?

Author:  Dr_BenD_over [ Wed Oct 15, 2008 2:30 pm ]
Post subject: 

For Ati the have to be the same core. They can be different manufacturers, memory sizes or clocked differently (each card runs at it own speed)

For example:

HD3870 + HD3850
HD4870 + HD4850

http://game.amd.com/us-en/content/image ... July08.jpg

For Nvidia they can be different manufacturers, different clocks(card clocked to lower speed) and different memory size. I suspect that the number of shaders must be matched as well, which screws up things on a pretty collosal scale on the Nivida side as they have cards with the same names that are different, and cards with different names that are the same (9800GT = 8800GT)

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