ok the story is like this i have gigabyte mobo x58 ud4p and i want to put on him one 7970 gpu(amd) and gts 250 for the physx
the slot 16_1 and 16_2 as you know very close and the gpu fans dont help so i wonder if i can put the 7970 as primary card on 16_2 cus the fans have more space in this place and not stock in the other card back
Your better off getting just the 7970 and not the gts250 for physix, in gaming the physix is not making as much difference in gameplay and it would e a watse to get a seperate video card just for that. Plus it's very diffacult to get the two different video cards to work together , AMD doesn't do physix.
You will be better off to get a GTX 680 and it will do physix without getting the second card.
What happens is if the nvidia card detects the AMD card in the system it locks the physix so that's why I had said earlier that it was very hard to do but there is a drivers hack that they say can do it.