Originally Posted by [nK]Sharp
The 600t is a mid tower isn't it. If so it may be a little difficult to keep it as cool as it might be in a full tower but it should still work I would imagine.
There's no logic there.
A mid tower with lots of fans will cool better than a full tower with few or no fans. The size of the case doesn't mean much - in fact, in a larger case, the air has more of a distance to move before it reaches where it needs to be, thus having less pressure.
Having said that, 580 SLI in a 600t is going to run warm. It's going to be very warm regardless of the chassis; the 600t lacks a fan on the side panel. A side panel fan blowing air on the cards is going to help reduce the temperatures, but when you have two large, hot cards sandwiched together, they are going to be warm.