I thought I was good to go with five 7950's on my GA990fxa-ud5 but cgminer will not see the 5th gigabyte 7950.
each of my cards has been voltage unlocked to 1.09V and I'm using one powered 16x riser in the mix.
I've tried a 1x powered risers and different pci slots and I still can't get the 5th on cgminer.

I've read on the forum that my mobo gives some fits. I don't think I need to 'short' any of the slots since my windows system recognizes all cards.

Can anybody help in this situation?

Hoplou