Wakko,
Did you go to the site that explains the poor RF filter design on some
GeForce cards?
Here
It's possible that some of the manufacturers have caught on or are using
better components and the blurring is less evident in newer boards. You
should not have to desolder the caps and inductors on the output of your
card to get it to work right, but alas, that is what some people have had
to resort to...