UPDATE
Here is my fix. I'm using the 100.65 WHQL 32 driver btw. I have a 7600 GT

Note: Ntune is not a good workaround. 1. It is meant for Nvidia
motherboards. 2. The fan only remains quiet for a given session, a reboot or
putting the system to sleep and re-awakening returns the fan to full speed.
3. Ntune is buggy with Vista.

Open Power Options/Settings and select Power saver as the plan.
Click on Change plan settings for the Power saver.
In the next window select Change advanced power settings
In the Power Options Advance settings scroll down and expand Processor power
management. For both Minimum processor state and Maximum processor state set
both to 100%. Click ok Save changes. Note: It may take a minute or 2 for the
graphics card fan to go off after performing these steps.

This is working flawlessly for me so far. Hope this helps everyone else and
spread the word if it does! I know a lot of people are annoyed by this bug
until a real fix comes from Nvidia.

"Stefan Eesmann" wrote:
[color=blue]
> Hi,
>
> in XP the fan was only running when TV functionalty etc. was used, but in
> Vista it's running right from the start. Turned already Aero off but the fan
> doesn't go off.
>
> Any ideas ?
>
>[/color]