Meh. Not all give a damn about power/heat/noise.
Some of us are enthusiast and care about performance/performance/performance, and don't mind building a case around the GPU solution.
BTW- I had an FX5800, and you cannot compare the fan noise of that card to the fan noise of a GTX480. It's not even close, the FX5800 did sound like a hairdryer in your case. It's pretty doubtful NVIDIA would offer a card with similar noise again as people still talk about it all of these years later.
Notice the .5db noise difference between a GTX480 and a HD5970? Ever seen a thread "OMG! The HD5970 is too loud!" even though the HD5970 has exactly the same noise