I heard about this rumor earlier this week already, yet yesterday an NVIDIA board-partner showed me some proof.
It seems that Gainward doesn't like to be forced to sell NVIDIA solely. And why should they, if Gigabyte, ASUS and MSI can do that as well, just because they're big. Therefore Gainward made the bold move to sell ATI graphics cards as well. according to one source I have, Gainward notified NVIDIA today about their decision.
It's quite interesting what NVIDIA's reaction is going to be as NVIDIA is pretty keen on keeping their board-partners to remain NVIDIA exclusive.
And if you need proof ...
