I just read the power requirements for new Nvidia G80 DirectX10 based graphic cards. And I can't say I didn't expect this numbers coming, perhaps I didn't expect them being so huge. I mean, graphic cards industry is going berserk. Which sane person will mount dual 8800GTX graphics card and at least 800W PSU (rhetorical question)? I am not even going to imagine the loudness of such as beast. Dissipating 800W should be loud, very loud.
But hey, on the bright side you won't need heating for the winter.
PS. Thanks to some manufacturers out there for selling fanless/silent graphic cards such as Gigabyte GV-NX76T256D-RH which I am planning to get soon. I'll certainly avoid everything with fan on it for the time being.