I recently received my Area 51-ALX. I have Dual 2GB radeon 5970 cards. I opened the chassis and noticed that the cards was stack right on top of each other with no space betwen them. The fans are placed on the bottom of the cards.. My concern is that the fan on the top card is being blocked by the bottom video card. Is this a problem for overheating?
Thats why they put Ports at the end of the card, for Xfire config. So the top card will just suck all the air from the ports, and the bottom card will suck air from fan space+ports. You should be fine.