z77a-g45 can run 6 cards. If you want to run 7 card, there is not enough data out there to know what can run 7 cards, and any board that appears to run 7 cards will be very pricy.
Thanks! I think that is what I am going to get. 100 extra dollars for a board that may or may not be able to run an extra card just doesn't seem worth it.