What is the quietest GPU & AMD vs nVidia

So I want a quiet GPU, around the 7850 2GB performance range. Also I will be using dual displays

well the quietest GPU would be the sapphire passive 7770 with no fans

anything above a 7770 or 650 would require some form of active cooling, but water cooling is pretty quiet

Woah that's huge. If that would even fit the BitFenix Prodig... Thank you!!

haha thats what you thought phosogene NOW say hello to my gtx 680 toasty maker!!!

http://www.geek.com/articles/chips/passively-cooled-geforce-gtx-680-uses-20-heatpipes-2-aluminum-heatsinks-20120628/

Oh my goodness.... I would have to blow a hole in the Prodigy to fit that beast

heh. Not the 6990