The problem with fan noise is that they are subjective. Some people say a
fan is quiet because the noise does not bother them or because they have
crap hearing. Similarly, some people are more affected by high pitched fan
noise - CPU fans have this problem - or lower bassed noise.
It is horses for courses so the best thing to do is to ignore someone saying
such and such is silent because it might be quiet to them but not to you. If
you want quiet then get rid of the fans.
More and more card makers are selling VGA cards with heatsinks - they are
silent.
J.