GeforceFX 5800 - Problem...

I've got my new computer with this graphic video card.
A Geforce Fx5800 by Asus.
Now, the problem is... when I boot the computer
at the start I hear the spinning fan of the fx...
then the silence... of course because I'm in windows
and I'm not executing videogames. But when I try
to play to a videogame (direct3d opengl) the fan doesn't make
any noise... now...

Am I fortunate, because I've a silent fx5800 :-P eheh
Or what? I hear the fx's spinning fan accelerate only when I boot
the computer and for three seconds (probably it test itself)

Let me know thanks in advance.

..: Emily and TheGhost :.