:lol: i take it you read that techreport article.. the thing is, if there's no air inside the case, then theres nothing for the graphics card fan to suck in, nothing for any of hte fans to do, if you get my meaning. Air is meant to conduct the air and dissipate it. if there's less air in the case (no air would make it die within seconds i think, but no air would be fairly hard to achieve), then your temps will suffer. Better to have 2xintake and 3xexhaust. eg, two 120mm fans at the front, a PSU exhaust, a graphics card small exhaust, and a rear exhaust fan/rear exhaust fan+1 or 2 top fans.
your system must have air to move the heat around..