Hi,
 
I had 2 EVGA GTX 280 SCs. I finally upgraded them to the GTX680 and could not be happier. I was curious which scenario would be better:
 
A) Use GTX680 alone
 
B) Use GTX680 and put one of my GTX280s back in to handle Physx processing.
 
Think B would help my performance? Looking to get a few more frames per second.
 
Thanks!