Premiere Pro CS6 and GTX 680

I recently upgraded my video card from a GTX 580 to a GTX 680. At first, PP did not recognize the card and I had to manually add it to the config(?) file.

 

My problem is that PP CS6 makes very poor use of my new card. My render times are slower than before. When I check the GPU usage, it keeps jumping up and down. It never reaches above 40 odd percent.

 

Am I doing something wrong?

via Adobe Community : Popular Discussions – Adobe Premiere Forums http://forums.adobe.com/thread/1030903