The best silent card you can get is 9800 ... thats what I am using.

I use a arm like thing that mount a 120cc fan right above the video card. If you have a huge heat sink you MIGHT get away with it. Well they make a product that can take two 120cc fans:



http://www.frozencpu.com/products/10...oon.html#blank

Glad I looked this up for you I can move to something better then a 9800 now and still have low noise.