so yesterday i updated my gtx 660 to a radeon 7970 the 660 used the pci-3 slot so after removing the nvidia drivers i put in my new card but couldnt get a screen on... then i used the gpu in the mobo where i got a screen i then proceded to download the drivers for my new gpu, and restartet yet i couldt see it in device manager...
then i removed the gpu put in my 660 again and that worked fine..
after a while i tried the pci-2 slot with my 7970 and that worked perfectly... so
how come i can't use my pci-3slot for my radeon 7970 but it works for a 660?
I EVEN downloaded the newest bios driver aswell yet no luck

hope someone can help me as i want to set my gpu in crossfire soon