The new Nvidia chipset will make Nvidia graphics cards run faster. This is the dream combination and this is what the future brings. All Hybrid SLI chipsets will work faster with Nvidia boards and if you plug an ATI graphics card nothing will happen, there won't be any performance increase.
Therefore, AMD already marked Nvidia as a hostile and Nvidia is simply returning the favor. It doesn’t take a scientist to figure out that AMD will probably do the same.
AMD’s upcoming Hyper Crossfire or however they will end up calling it, will certainly work faster with AMD motherboards powered with ATI graphics than any other scenario. This will drag people to pick Nvidia – Nvidia graphics cards and chipsets from ATI – AMD as this will be the only way to boost performance.
Source :
http://www.fudzilla.com/index.php?op...=3629&Itemid=1