Why only 2 cards for one case?
I have always 3 5970 in one 19" case.
because i have enough space, and i want to let the cards enough room to breath

From one rack guy to another, very nice but with the cards and from what I can see how do you keep the temps down? I had to pull the cover on my CPU to get enough air in there to cool that bad boy down.
i have AC on that room, all my GPUs run around 62-63 degrees celcius with fans below 50% rpm. top cover is indeed off mainly for my confort