I'm building a media content PC that will be about evenly divided between photo and video editing, as well as Web development work, using Adobe CS6 applications.
From the research I've done, it appears that an nVidia card would clearly be the best tool for video editing while an AMD card the best for photo editing.
The reason: Premiere Pro relies on CUDA, a proprietary nVidia technology, for its new graphic acceleration, which can exponentially reduce the amount of time for certain tasks; this is not available in the AMD cards. Photoshop, on the other hand, relies more on open CL, which is implemented much better on the AMD cards, which also benefit from the fact they have better compute processing than the latest, more gamer-oriented nVidia cards.
There is one outlying benchmark from Puget Systems that puts the nVidia cards ahead on both applications, but it's so much the exception that there may be an issue with their methodology.
I've got an EVGA GTX 670 FTW in hand, but I'm considering returning it for an Radeon HD 7970 Ghz Edition. But then I lose the video acceleration benefits. A professional video editor might counsel getting one of the higher end nVidia Quadro cards for $1,000+. It would solve the problem, but that's not in the budget, and the Quadro cards in the $500-$750 range are not as generally capable as the other cards I'm looking at.
So, there you have it.
Does anyone have experience with either of these cards with CS6 or see an angle I'm missing?